Having seen this video, Vevor emailed me: "I noticed that you created a vevor milling table, can you feature these product links?" US milling table s.vevor.com/bfQPkv CA milling table s.vevor.com/bfQPkJ I bought the table myself, but I did get the mini lathe in a previous video for free, and they were ok with that video as well, even though I was quite critical of various aspects of it.
Unbelievable! Vevor does not even understand the serious negative revelations you have made about this piece of sh*t!. Any publicity is good publicity, just like show business! And people are lapping it up - ref: Canada now out of stock! Too sad!
I mean... if you know how to an angle grinder is perfectly acceptable to do scraping work with. I know an older dude, French guy that moved to Germany back in the 80's, he's a nutter, but he can do incredibly precise scrape work with a small Makita angle grinder. When i asked him why he's not using the conventional scraper tool, he said he's too old to use the vibrator and too lazy to do it manually. Yes, in that fashion. But hey, he does incredibly good work and he's gotten an old clapped out lathe i had so close to perfect that i only get a very small error on the standard cylinder test. Barely noticeable on my dial indicator. That said, when i tried it, i made a gouge in a test piece and said... i'm not good enough and went back to my hand scraper. Training wheels it is. Some people just have the "touch".
@@difflocktwo dont insult those who are, making a 4 m2 small shed isnt being a carpenter nor is bying the cheapest chinese lathe and doing stupid things with it.
@@sphinxios @difflocktwo I was a Master Carpenter 35 years and yes he is a carpenter, i never built thing like he has. Like coding there are many different Languages, and he has his own. Why so bitter difflocktwo?
Matthias never fails to amaze me with his insightful and meticulous logic to show us not only the "root cause" of engineering/physics/math-based designs and how to resolve them. I have seen several people on YT showing off the same x-y table and recognizing most of the issues he has shown here but none have done such "analytical" investigations with simple DIY solutions any DIY'er can follow
His last video where he showed that the gears for threading chart had just flat out wrong values - it took Adam savage 3 failed screws and an afternoon of thinking to figure that out!
Retired CNC tech here. Cut a section off the bent lead screw. Take the lose nut with the lead screw section in it. Put it on a wood fixture. Melt some Babbitt metal and cast a busing/bearing in the nut. Twist the stub out of your cast bushing. Take a clean section of your trash lead screw and some valve fringing compound. Lap the working surface of your cast bushing. Then clean it out well with naphtha and a tooth brush. Pack your lead screw with a stiff grease and assemble. You’ll cut your lash in half. This is how early machine tools were made in the 19th century. And bearings were made in the Ford T and A’s engines. Do it right you’ll never do it again. Second point. Those are not thrust bearings on the spindle. Just pillow bearings. True your casting surfaces by putting brass washers into contact. Make a couple on your lathe. Cover them with valve grinding compound and lap the contact surfaces in. Pull it apart and remove the brass washers. Clean everything with naphtha and a brush. Be sure those open bearings are clean. Get yourself two cupped spring steel washers. Any industrial supply like MSC or Grainger will have them. About 0.050 inch should be right. Pack those bearings with a stiff grease. Put the spring washers between the back bearing and the inner end cap, and between the outer end cap and the outer bearing. I’m contact with the surfaces you previously lapped. Cups toward the bearings. Then torque the spindle nut. You may need to replace that cheesy acorn nut with a pair of thin profile nuts. Work it back and forth with your indicator as in the video, torquing as you go. Find the best compromise between free nothing and consistency. Then lock the two spindle nuts together. A little blue locktite helps. Best you can do. Fox out
Chinese products being cheap and dodgy is.. normal. But when it comes to tools, I always get red in the face and Greta Thunberg levels of outraged: "How could you?!".
Really enjoying the new metal based content and watching you problem solving and learning as you go. It can be an addiction trying to find accuracy in tools at a lower price point
You are the best person on You Tube that gets things that are cheaply made and tries to make it better! I am like most... I don't have unlimited money. Now I know not to buy one of these now because I do not have the tools to make it like it ought to be. I appreciate your candidacy with all you videos. LONG TIME WATCHER
Great to see you diving in to machining, it took a lot of restraint for me not to buy a Chinese import lathe and mill, I tried to look for second hand lathe and mill and couldn’t find any, so I bought my lathe( Chinese import) from a uk company that basically spruced it up and made it far more precise than what it came from the factory. I wasn’t gonna buy an import mill so I waiting. Finally got my hands on a old round column mill for a very reasonable price and I was and still very glad I waited and got my hands on it, it’s not perfect but it’s 100 times better than anything I could have got and afforded. I love machining and learning everything that goes with it. Woodworking is very forgiven when mistakes are made, not the case with machining. So it’s a learning curve and a great challenge, a lot of room for learning. I hope you enjoy your new toys and you adventure in precision engineering, unfortunately that’s not something we get on Chinese imports, but that’s something that you can certainly work on to achieve. Great seeing you get in about it.
Especially in the UK there are so many old, high quality lathes around. I had the same decision to make but I'm glad I decided against the chinese product and for a Drummond B-type from 1914. She was wonkey, but as I'm slowly improving the features, I learn a lot on the way. Those were made as "real" tools for industry as well, not for hobbyists, it's already at the point where I can see those qualities. Certainly when I whatch videos from chinese mini lathes I am baffled how bad some aspects of those are. I'd definitely go for older machines again.
@@computername yeah totally agree, they where made to last and they have. My mill is a round column nearok and it solidly build and am the same just slowly improving the precision and learning along the way, check my channel out if you like and follow along the way as we are both learning. I’ve had the chance to get a few old lathes it’s just there size and weight totally exceeds what my floor can handle but I plan to keep a look out and try and get my hands on a golden oldie. Good luck with your future projects.
@@gedr7664 if your talking about my lathe it’s warco. I think the lathe Matthias has is just a generic Chinese one, maybe from VEVOR but your need to get that from the man himself.
Something you can easily do with a round column mill is fill the column with hydraulic cement and a few pieces of rebar. The cement will swell just a bit as it sets so it won't be able to fall out. It will dampen vibrations by the added mass and stiffness.
I’m so glad you are going through the pain of tuning and setting up these low end metal working tools for your viewers. My very limited experience with high end metal working tools has steered away from these low end tools.
Hey there, love your videos. I've done 3 reviews on this mill table... actually 2 but another is in process now. All three came to the same conclusion. The table castings and machine were okay but the lead screws were junk. In the first video I did I replaced the lead screws with 3/4"-10 threaded rod and made dials. In the second video (and second table) I tried to keep the original lead screws and installed DROs. Yes it works but they wobble. In the third video (in process) I replace the screws with 3/8"-16 thread rod and increase the X-axis travel by about 3 inches. In hindsight i should have used 1/2"-13 and not 3/8" but it works. This video will hopefully be out tomorrow.
I really like how this video amplifies the types of errors that can be in even the highest quality spindles/leadscrews. I've watched some of Robin Renzetti's videos about making components for high end spindle rebuilds, and this video really helps me understand why he takes the great care he does for certain components (like lapping the locking nuts flat and parallel).
Very balanced view of what you should expect and how to deal with some of the bottom of the barrel 'machinist' tools out there. A lot of satisfaction can come from tuning up bad products if you take it in stride and realize that's part of the cost of paying so little.
Some X-Y tables cost many times more than these cheap imports. I'd expect those to be more refined. At the bottom of the price range there's going to be rough edges.
Buying Chinese equipment is a good way to acquire a long term project. Keep buying them and you will never run out of them!! Great for your channel and for UA-cam! Can't beat the Chinese I tell you...
This was very educational regarding Vevor product quality. Thank you so much! I had considered buying a few things from them but now I have written them off completely. That milling table was the worst excuse of a tool I think I have ever seen.
I've been asking myself for years how you ever got on without a metal lathe. 🤣🤣 You can take advantage of that slop in the lead screw nut mounting holes. If you pivot the nut a bit you can eliminate some of the backlash. It's a kudge, but it works.
I have that same unit. The best and most important fix is to surface grind the gibs on both x and y. Mine were both junk pieces of steel. Grinding them flat and parallel (with a true surface grinder) made a huge improvement in the ease and accuracy of travel...
I have one of those and had similar issues. What I did on the lead screw nut was 3D print a sleeve for it. Since the table is for light use, that seems to remove the play. Also, I stoned the ways, and trammed the table by making it parallel with the base. A pain, but it works well now.
I was taught at school and during my apprenticeship that you NEVER leave a chuck key in the lathe. It doesn't live there. In your hand or in the rest. NEVER the chuck. Good video and sorry you couldn't get the precision you desired.
I love this - This came borked, so he fixed the work they should have done at manufacture! However, i don't see it this way at all - not all tools come perfect, and most tools need some sort of adjustment and handling before they can be used for their intended use, so this video is actually showing that "Before you use your tools, check to make sure they are working correctly first" - A valuable lesson.
Those X-Y tables are almost never used for what they're intended to be used for. So what's the point? 99 out of 100 that buy them would never appreciate the effort. You can't talk the other 99 out of what they want to do either.
I have the exact same compound table Mathias. Bought it 2yrs ago. But mine wasn’t damaged….thank God🙏 The one I received is accurate within 2-3 thousandths in the X & Y axis. With that much error in your table, I think they should send you a replacement and see how that goes. Unless they’ve changed there manufacturing methods, you should have a more accurate table. Just my opinion🤷♂️That table is made for precision….if dropped and damaged I would request a replacement table. Metal doesn’t just break but also bends in other area’s that causes all sorts of problems.
@@matthiaswandel I have a neighbour who builds engines for racing cars.....he once had an offer from a chinese factory to make the engine, claiming they will copy it step by step, inch by inch, so he sent the engine to CN, and after a couple of months he received their prototype, which had a HUGE dent on one side.......when he called them to complaint, they said that dent was also in the original he sent (turns out the delivery company damaged it, and the chinese factory copied also the damages!!). Probably this table was damaged before the chinese started to copy it! (they even made the hole in the cardboard box, for more accuracy!)
Mathias i would suggest milling and mounting a second lead nut about an inch forward of the factory one, and let your lead screw pass through both of them. You may lose a couple inches of travel away from center, but the extra nut will absolutely help to stabilize that lead screw.
@@SuperDavidEF believe it or not you're not going to get a much better tolerance than that factory nut. I mean there is probably a tiny bit or room for improvement but It's probably within two or three thou, it just seems way tolerant because of how long the screw is. Any play whatsoever would drastically show up with a screw that long. I could be wrong but I bet much tighter than that and youd have some binding issues. 🤷
5:50 the term is "chilled", when casting, iron if it cools down too quick, it chills and hardens in that particular spot. This used to be a big issue before carbide tools were a thing. It also indicates that they run very little machining margin for their castings.
Such an interesting video! On my recent trip to China I couldn't help but notice various chinese brands of home air conditioners and also automobiles, many of which I was told are well respected, quality brands, that exist there but non existent outside China. What we see here in North America are generally low cost imports, and the quality reflects that.
The chinese are perfectly capable of producing quality products, but we usually look to them for cheap stuff, so that's what we get. There was a time when Japan, then Taiwan, were known for cheap junk too.
German stuff was junk after the war we used to call it Gerry built they made some good cars and bikes in 80s and 90s they went back to very dear junk after 2000😊
That is one of those units you buy as a kit/project. I think the only way you are going to get accuracy out of it is to mill a screw and make a bronze nut for it. Its easier than it sounds and you can remove all the slop.
Wow, Vevor is not showing good QC. That's unfortunate since they are bringing a lot of industrial machinery to people that couldn't afford it before. Great work on the lead screw and finding all of the issues.
The man who used to do his “precision” machining with an angle grinder has become the precision machinist persona at whom he once scoffed. Welcome to quality workmanship. Wait until you get a good lathe, one that doesn’t sound like dragging a steel garbage can on asphalt!
Very interesting. I don't follow all the details about why this surface does that, etc., but it is fascinating seeing you modify and attempt to improve the precision of your tools. Thanks for sharing.
I bought one of those tables a year ago with the idea that it would only be good as a raw casting, I did end up re-machining all of the important surfaces and re-scraping the ways as I am using it as a sort-of precision slide. The lead screws are not very nice, but functional enough for the purpose.
I have 3 of them. Modifications to Screws, nuts, and bushings for screws. And full screws for the x and y it just about takes 2 to make 1 and the Unsupported screws don't help it's why i made them full screws and took the table endplates for x and y put a bushing for the screw in them and added it to the other as well and made better Gibbs is how i got mine working. I have 2 tables that have cave of a hole in them. They did nothing to help me beyond sending me a replacement one that was as bad if not worse then the 1st. Then when i complained about the same issues, i got $40 and that was it. I am out $250, for 2 got one for free as a replacement and only got 1 useable one after sever modifications. This is more of a project if you buy one. Good video on you, hope you have better luck.
Next time, specify all parts shall be 100% Chinesium! That being said, your analytical talents enabled you to add more value to the finished product than what you started with. I look forward to your further adventures in machining!
I have a vevor bandsaw, and it was an absolute nightmare setting up. Nothing from the factory was remotely accurate. But once i got it set up, it works quite well!
Life of a DIY mechanist. Most machines from china are treated as assembled kits. Rough casting in need of finish machining. Have you heard of “metal scraping” to Finish in a machine? Adam Booth, Keith Rucker and Keith Fenner. Mr Pete 222 also May more answers . You’re on the right path. Thanks for sharing
I know it was cheap, so we can't expect too much from it... But this level of carelessness is just insulting! I almost bought a vevor lathe but changed my mind after seeing a lot of videos about the quality of vevor tools and machines...
Great Job!!! Winky's workshop Channel has a video called ; improving the lenght of the vevor mill table and one changing both lead screw, but he used RH threads..i have same table but i will change to Acme 5/8-8 LH, but have to chamge dials to Inches..keep posting!!
Thank you Matthias - the man who taught us to bring metalwork precision to woodwork. China produces hundreds of thousands of tons of badly made and badly packaged junk every year. Buyers send it back for refund or - even worse, a replacement, which is just as badly made as the one sent back! It's true that the branded version of this milling table will cost 3 - 4 times more and still be made in china, but like the iphone it will be made under strict western company supervision. The Chinese can produce quality.
As with many offshore machinery tools... they're just a kit in a box, waiting to be semi-perfected! :D If you run into a bent shaft like that, a couple of V-blocks, an arbor press and a dial indicator is the way to go. Bump, turn, read, repeat!
Seeing as you now have a leadscrew nut split longitudinally, use the half with the most meat on the thread and put it up against the leadscrew so that there is no or very little play against the thread and bolt it down. Then make a block out or hard wood, or metal if you have some, and place it against the leadscrew on the opposite side to the half nut and use it to push the leadscrew tight against the nut so that all the play is taken up. Unless you are trying to force a half inch cut it should make everything more accurate for what you want to use it for. On older lathes they used a half nut on the lead screw for moving the carriage along the bed. HTH
If you can swing it, would love another table analyzed. Comparing the cost and quality is amazing to me. My mill has a very worn table but I work around it.
Your milling table was packed in really strange packaging for that weight. I have the same type table (bought for one project), but mine was packed in plywood box secured with metal clamps. Table elements like handwheels and fixing nuts were packaged in plastic bag inside. I'm glad You managed to fix everything. :)
Very helpful presentation. IMO 10:51 That backlash on the cast nut I found was unfortunately necessary. On a similar table I tried to reduce it and found that without the slop in that nut the leadscrew would bind at some point in its travel due to the wobble in the leadscrew.
You can make it much more accurate by purchasing a DRO - digital read-out and installing it on both axis. That way you do not rely on cranking the handle but on a digital scale. Vevor does carry a DRO kit in their store and they might be willing to sponsor a video of you installing it on this table ;-)
I just looked and Vevor is sold out of the 2 axis DRO. It costs more than that X-Y table does too. So the other option is to just get a couple cheap digital calipers and screw them to the table. Which is what I'd do if it were me.
@@hobbifiedWell, that is exactly what I did for my Russian made table lathe. Bought a 4 inch digital calipers and a 12 inch plastic digital one and mounted them on my lathe. One day I will get "proper" [knockoff] DRO ;-)
Sometimes there are products/tools that is better buying good quality used ones even if they need repair, than new cheap ones. My dad has a small metal workshop, the lathe and milling machine were bought used, they needed repairs/rebuilt but at least we got good stuff.
That is Hilarious! Great you got it working at the end. Your bending reminded me of me having to bend several rods and the lead screw straight on my cheap CNC machine. You might have succeeded the bending without / with less weakening the material, these cuts look quite deep.
You can straighten any shaft in your lathe. Chuck the bent end in the three jaw, then put a DTi on the end. Rotate the shaft around to find where it goes high and tap it down a little, check the run out with the Dti again and repeat until the runout is .001 or less.
I honestly think they are cast, but your forming hypothesis makes sense.. I have 3 broken vises with various casting defects. A sodium hydroxide bath followed by phosphoric acid treatment revealed many cracks on one of them. The cast iron is not homogenous, going from malleable iron to super hard and brittle white cast iron that eats cobalt and even carbide bits.
I have one and love it, but mine wasn't dropped and I don't use the scale. I took it all apart, cleaned and deburred, then reassembled and really took time to adjust the gibs.
Great job brining that milling table to greater precision and insightful observation into the market which Venor is shooting for. Am I right in guessing you will use your drill press to mount the milling table and the quill shaft to hold the cutter? If so, does your drill press exhibit a runout to complement the increased accuracy of the milling table?
I bought one of those x y tables. They pretty much suck. You did some things I didn't think of. I may have to revisit it again. Might be able to get it good enough for the drill press. Might try to make a brass nut for it too. At some point the returns are diminishing.
The metal Lathe is the heart of the shop. Now take lessons from Mr. Pete (tubalcain on UA-cam (Your UA-cam Shop Teacher). His early Lathe videos are best for new comers. I on the other hand was lucky enough to pick up a 1950's 13" Atlas lathe for 700.00. Great machine. Cheers
There is a way to fix the nut to help the backlash situation. Cut the nut about a 1/3rd along with a hacksaw or band saw. now with a 2 piece nut you can shim them apart to remove the extra backlash. All you need to do then is drill a couple of holes for a steel dowel pin or the end of a clean drill bit shank to prevent rotation. Or perhaps a couple of cap screws to hold the nut in opposing corners? It will make a pretty big difference Then a simple task of make a couple of thin clamp plates for the sides to hold them together tightly clamping the shims.
I had not watched this video, but did just watch most of the "why the hate" video and when you said "they are building to a price and the quality is what it is" I came to see what that "price" was. in the UK it's saying £91 !! For a milling table that's only about 0.05mm out of true - no-one can legitimately complain at that. Considering buying it myself now as I've had cause to need a lateral milling table a couple of times.
3:08 yeah threads are usually rolled at industrial scales, leaves less waste, since it moves the material arround instead of cutting it. 4:52 basically how straightening is done with a press too, the tools are usually a bit more sophisticated but yeh the principle is the same (althought idk if you really needed those relieve cuts, never seen it be done on the straightening press)
I'm glad that you were able to make these discrepancies known. for a machined item that was ridicules!! I'm not an engineer, but I can appreciate the extent you went thru to make that atrocity even workable. the only thing that would justify that kind of aborted craftsmanship if it were at a give away price. to compensake one's ego to have to "Machine the thing to make it work. well done Matthias! I sincerly hope they watch this video.
For what most jokers are going to try to use that table for none of it matters. The problem is Mathias wanted to use the table for what it's meant to be used for. Which is work positioning. For that it is less than fit for use. They don't work as milling tables either but they're not supposed to. That's what everyone that buys one of those tries to do with it. Why that doesn't work is complicated. But it just don't.
Matthias, it's great to see you finally making your way into precision metalworking! I've often thought that if you had a lathe and a mill, you'd rule the world. Honestly, you can completely ignore the handwheel dials if you install digital readouts for each axis. iGaging linear scales would be a good, inexpensive solution. I use them on my lathe, and they've been plenty accurate and repeatable for my needs.
This is pretty much my experience with tools straight out of china: they are okay-ish if you spend some time fixing all the things their (non-existant) QA missed. Worst case you end up with broken parts but generally it's just a matter of re-assembling it making sure all the corners are square, loctiting all the screws so they don't vibrate out and doing a couple of test pieces to find out where the lack of precision comes from and fixing those. If you do that, the tools are fine, but for about half the price of a "locally" produced thing if you don't want to pay too much but have the time it's a fine product, as long as you take the shortcomings into account.
Is the X and Y perpendicular? I think you can work around everything else. When I was a kid I used to mill in one-direction to avoid slop from backlash on worn machines. It was not sensible to find a machine which didn't have backlash, and it varied along the length of the screw, because the screw at the centre of the table was far more worn than at the ends. You did have to watch the friction else the bit could "climb" your piece and suck the whole table along with the piece into the cutter.
I have actually been quite impressed with the robustness and quality of the Vevor products I have bought in the past. I haven't, however, bought anything like a machinist tool or anything that requires any sort of precision. But I am a bit surprised surprised at how consistently bad that lead screw is.
Matthias, you could tighten up the threads in that lead screw block by slicing the block in half (90 degrees to the screw axis) and then drilling and tapping for two lash screws with jam nuts on them. This would pull the two 'halves' of the threaded block together and give you infinite adjustability of the drag on the lead screw, getting rid of that slop in the screw/block fitment.
because the acme threads are cast, I expect there is variation in their width. A stiff spring might be needed. e.g., after slicing it in half, pull it together with a tension spring. The thickness of the bandsaw blade should have removed enough material to let the spring clean up the slop. Also as machines age, the thread thins more in the center. IMHO, you can account for backlash in machines, but the laziest fix would be a digital readout. I would also check that crossfeed for... square. X and Y might not be perpendicular.
I have had similar issues on Vevor and auto parts when buying from Amazon. Some parts I returned cost me to return (one nearly 1/2 the cost of the product) even though I am a Prime member. Amazon has, IMO, a buyer beware site.
It is not a mill table. It is an X-Y table. There is a difference. I know it looks like a mill table but it just ain't. Melt a bunch down and maybe you can make a mill out of them then? 20 of them would weigh as much as my mill does. I just have a benchtop mill too. You'd need a lot more to make a knee mill.
Having seen this video, Vevor emailed me:
"I noticed that you created a vevor milling table, can you feature these product links?"
US milling table s.vevor.com/bfQPkv
CA milling table s.vevor.com/bfQPkJ
I bought the table myself, but I did get the mini lathe in a previous video for free, and they were ok with that video as well, even though I was quite critical of various aspects of it.
Precisely for that, honest reviews actually boost their sales! Because they are sometimes 10 times cheaper than competitors
oops on the reversed links - I just cut and pasted those from the email without testing them, will fix.
And checking those links now -- Canda now out of stock!
Is it time to make a wooden mill table?
Unbelievable! Vevor does not even understand the serious negative revelations you have made about this piece of sh*t!. Any publicity is good publicity, just like show business! And people are lapping it up - ref: Canada now out of stock! Too sad!
Matthias is slowly turning into This Old Tony
Imagine the reverse - Old Tony turns into Wandel !
Hmmm I'm missing out on the pervasive dad jokes
Wrong. Matthias was ToT all along. You're just looking at the wrong time scale. See, this is ToT pre-time travel.
And we got front row seats!
Love it
@@aserta that makes so much sense
“How did I ever get in without a metal lathe?” Had me chuckling. If I recall, Mathias once successfully adjusted a morse taper with an angle grinder!
After spaffing a bunch of weld onto it to make it thicker, yes I remember 🤣 Somehow it even worked!
I asked myself that very thing once I learned about machining. Damn schools for taking classes away!
No he just squeezed it really hard with his hands.
I mean... if you know how to an angle grinder is perfectly acceptable to do scraping work with. I know an older dude, French guy that moved to Germany back in the 80's, he's a nutter, but he can do incredibly precise scrape work with a small Makita angle grinder. When i asked him why he's not using the conventional scraper tool, he said he's too old to use the vibrator and too lazy to do it manually. Yes, in that fashion.
But hey, he does incredibly good work and he's gotten an old clapped out lathe i had so close to perfect that i only get a very small error on the standard cylinder test. Barely noticeable on my dial indicator. That said, when i tried it, i made a gouge in a test piece and said... i'm not good enough and went back to my hand scraper. Training wheels it is.
Some people just have the "touch".
I love that the "and I am going to fix it" is implied at this point
Matthias, the genius software engineer, the carpenter, the UA-camr and now, the machinist!!!
programmer maybe, but never a carpenter nor a machinist
@@sphinxios Clearly he is both a carpenter and a machinist.
@@difflocktwo dont insult those who are, making a 4 m2 small shed isnt being a carpenter nor is bying the cheapest chinese lathe and doing stupid things with it.
@@sphinxios Says who?
@@sphinxios @difflocktwo I was a Master Carpenter 35 years and yes he is a carpenter, i never built thing like he has. Like coding there are many different Languages, and he has his own. Why so bitter difflocktwo?
Matthias never fails to amaze me with his insightful and meticulous logic to show us not only the "root cause" of engineering/physics/math-based designs and how to resolve them. I have seen several people on YT showing off the same x-y table and recognizing most of the issues he has shown here but none have done such "analytical" investigations with simple DIY solutions any DIY'er can follow
His last video where he showed that the gears for threading chart had just flat out wrong values - it took Adam savage 3 failed screws and an afternoon of thinking to figure that out!
Retired CNC tech here.
Cut a section off the bent lead screw. Take the lose nut with the lead screw section in it. Put it on a wood fixture. Melt some Babbitt metal and cast a busing/bearing in the nut. Twist the stub out of your cast bushing.
Take a clean section of your trash lead screw and some valve fringing compound. Lap the working surface of your cast bushing. Then clean it out well with naphtha and a tooth brush.
Pack your lead screw with a stiff grease and assemble. You’ll cut your lash in half. This is how early machine tools were made in the 19th century. And bearings were made in the Ford T and A’s engines. Do it right you’ll never do it again.
Second point. Those are not thrust bearings on the spindle. Just pillow bearings. True your casting surfaces by putting brass washers into contact. Make a couple on your lathe. Cover them with valve grinding compound and lap the contact surfaces in.
Pull it apart and remove the brass washers. Clean everything with naphtha and a brush. Be sure those open bearings are clean. Get yourself two cupped spring steel washers. Any industrial supply like MSC or Grainger will have them. About 0.050 inch should be right.
Pack those bearings with a stiff grease. Put the spring washers between the back bearing and the inner end cap, and between the outer end cap and the outer bearing. I’m contact with the surfaces you previously lapped. Cups toward the bearings.
Then torque the spindle nut. You may need to replace that cheesy acorn nut with a pair of thin profile nuts. Work it back and forth with your indicator as in the video, torquing as you go. Find the best compromise between free nothing and consistency. Then lock the two spindle nuts together. A little blue locktite helps.
Best you can do.
Fox out
Your bodging of literally EVERYTHING in wood to a high standard is what made you unique and famous :-) and you know it. And we love(d) it.
This goes to show that for some products you really get what you pay for.
If we even get that
Ain't is so!
Chinese products being cheap and dodgy is.. normal. But when it comes to tools, I always get red in the face and Greta Thunberg levels of outraged: "How could you?!".
@@teaCupkk
The big problem is the price point the product is built to.
Or at the very least, you don't get what you don't pay for.
Really enjoying the new metal based content and watching you problem solving and learning as you go. It can be an addiction trying to find accuracy in tools at a lower price point
For years now, I've enjoyed watching your problem-solving genius. You're truly an inspiration, Matthias. Thanks for the great content.
You are the best person on You Tube that gets things that are cheaply made and tries to make it better! I am like most... I don't have unlimited money. Now I know not to buy one of these now because I do not have the tools to make it like it ought to be. I appreciate your candidacy with all you videos. LONG TIME WATCHER
Thank you Matthias for reinforcing my belief in used tools and machinery.
I've seen a lot of videos of people using this milling table. ugh! you had so many issues. you are the master of making things work!!!
Matthias - I like this “Fix Cheap Tools” series
Great to see you diving in to machining, it took a lot of restraint for me not to buy a Chinese import lathe and mill, I tried to look for second hand lathe and mill and couldn’t find any, so I bought my lathe( Chinese import) from a uk company that basically spruced it up and made it far more precise than what it came from the factory. I wasn’t gonna buy an import mill so I waiting. Finally got my hands on a old round column mill for a very reasonable price and I was and still very glad I waited and got my hands on it, it’s not perfect but it’s 100 times better than anything I could have got and afforded. I love machining and learning everything that goes with it. Woodworking is very forgiven when mistakes are made, not the case with machining. So it’s a learning curve and a great challenge, a lot of room for learning. I hope you enjoy your new toys and you adventure in precision engineering, unfortunately that’s not something we get on Chinese imports, but that’s something that you can certainly work on to achieve. Great seeing you get in about it.
Especially in the UK there are so many old, high quality lathes around. I had the same decision to make but I'm glad I decided against the chinese product and for a Drummond B-type from 1914. She was wonkey, but as I'm slowly improving the features, I learn a lot on the way. Those were made as "real" tools for industry as well, not for hobbyists, it's already at the point where I can see those qualities. Certainly when I whatch videos from chinese mini lathes I am baffled how bad some aspects of those are. I'd definitely go for older machines again.
@@computername yeah totally agree, they where made to last and they have. My mill is a round column nearok and it solidly build and am the same just slowly improving the precision and learning along the way, check my channel out if you like and follow along the way as we are both learning. I’ve had the chance to get a few old lathes it’s just there size and weight totally exceeds what my floor can handle but I plan to keep a look out and try and get my hands on a golden oldie. Good luck with your future projects.
what is the comapny for the lathe ?
@@gedr7664 if your talking about my lathe it’s warco. I think the lathe Matthias has is just a generic Chinese one, maybe from VEVOR but your need to get that from the man himself.
Something you can easily do with a round column mill is fill the column with hydraulic cement and a few pieces of rebar. The cement will swell just a bit as it sets so it won't be able to fall out. It will dampen vibrations by the added mass and stiffness.
I’m so glad you are going through the pain of tuning and setting up these low end metal working tools for your viewers. My very limited experience with high end metal working tools has steered away from these low end tools.
Hey there, love your videos. I've done 3 reviews on this mill table... actually 2 but another is in process now. All three came to the same conclusion. The table castings and machine were okay but the lead screws were junk. In the first video I did I replaced the lead screws with 3/4"-10 threaded rod and made dials. In the second video (and second table) I tried to keep the original lead screws and installed DROs. Yes it works but they wobble. In the third video (in process) I replace the screws with 3/8"-16 thread rod and increase the X-axis travel by about 3 inches. In hindsight i should have used 1/2"-13 and not 3/8" but it works. This video will hopefully be out tomorrow.
I have been following your videos for some years now and must tell you are AMAZING!
It is a joy watching how you approach, troubleshoot and improve issues like these, Matthias :)
I love watching him fix/improve cheap products. Also agreed, love that you have a metal lathe now.
I really like how this video amplifies the types of errors that can be in even the highest quality spindles/leadscrews. I've watched some of Robin Renzetti's videos about making components for high end spindle rebuilds, and this video really helps me understand why he takes the great care he does for certain components (like lapping the locking nuts flat and parallel).
Bravo Matthias! I am so happy that you got this lathe... because you are gonna teach us so much!! Enjoy it!
Very balanced view of what you should expect and how to deal with some of the bottom of the barrel 'machinist' tools out there. A lot of satisfaction can come from tuning up bad products if you take it in stride and realize that's part of the cost of paying so little.
Some X-Y tables cost many times more than these cheap imports. I'd expect those to be more refined. At the bottom of the price range there's going to be rough edges.
Buying Chinese equipment is a good way to acquire a long term project. Keep buying them and you will never run out of them!! Great for your channel and for UA-cam! Can't beat the Chinese I tell you...
Paid to fiddle around in the shop. You are living my dream. Keep up the good work
This was very educational regarding Vevor product quality. Thank you so much! I had considered buying a few things from them but now I have written them off completely. That milling table was the worst excuse of a tool I think I have ever seen.
Thank you for going over this unit in detail, I previously considered buying one!
I've been asking myself for years how you ever got on without a metal lathe. 🤣🤣
You can take advantage of that slop in the lead screw nut mounting holes. If you pivot the nut a bit you can eliminate some of the backlash. It's a kudge, but it works.
I was going to comment that the broken nut was just an accidental backlash compensation feature 😂
I have that same unit. The best and most important fix is to surface grind the gibs on both x and y. Mine were both junk pieces of steel. Grinding them flat and parallel (with a true surface grinder) made a huge improvement in the ease and accuracy of travel...
I have one of those and had similar issues. What I did on the lead screw nut was 3D print a sleeve for it.
Since the table is for light use, that seems to remove the play. Also, I stoned the ways, and trammed the table by making it parallel with the base. A pain, but it works well now.
I was taught at school and during my apprenticeship that you NEVER leave a chuck key in the lathe. It doesn't live there. In your hand or in the rest. NEVER the chuck.
Good video and sorry you couldn't get the precision you desired.
If everyone was as determined as Matthius, all products would be awesome!
This video showcases how the mind of a genius works. “Then I realized…” Brilliant!
I love this - This came borked, so he fixed the work they should have done at manufacture!
However, i don't see it this way at all - not all tools come perfect, and most tools need some sort of adjustment and handling before they can be used for their intended use, so this video is actually showing that "Before you use your tools, check to make sure they are working correctly first" - A valuable lesson.
Those X-Y tables are almost never used for what they're intended to be used for. So what's the point? 99 out of 100 that buy them would never appreciate the effort. You can't talk the other 99 out of what they want to do either.
I have the exact same compound table Mathias. Bought it 2yrs ago. But mine wasn’t damaged….thank God🙏 The one I received is accurate within 2-3 thousandths in the X & Y axis. With that much error in your table, I think they should send you a replacement and see how that goes. Unless they’ve changed there manufacturing methods, you should have a more accurate table. Just my opinion🤷♂️That table is made for precision….if dropped and damaged I would request a replacement table. Metal doesn’t just break but also bends in other area’s that causes all sorts of problems.
Chines machine should be bought in all technical schools......they are great to learn how to fix the hundreds of issues they bring from the factory.
Definitely a learning experience. Sort of like buying something used and banged up.
@@matthiaswandel I have a neighbour who builds engines for racing cars.....he once had an offer from a chinese factory to make the engine, claiming they will copy it step by step, inch by inch, so he sent the engine to CN, and after a couple of months he received their prototype, which had a HUGE dent on one side.......when he called them to complaint, they said that dent was also in the original he sent (turns out the delivery company damaged it, and the chinese factory copied also the damages!!).
Probably this table was damaged before the chinese started to copy it! (they even made the hole in the cardboard box, for more accuracy!)
the wise bending and checking is amazing, very useful, thanks!
Mathias i would suggest milling and mounting a second lead nut about an inch forward of the factory one, and let your lead screw pass through both of them. You may lose a couple inches of travel away from center, but the extra nut will absolutely help to stabilize that lead screw.
If he's going to machine a new nut, wouldn't it be better to just replace the factory nut?
@@SuperDavidEF Do both perhaps?
@@SuperDavidEF believe it or not you're not going to get a much better tolerance than that factory nut. I mean there is probably a tiny bit or room for improvement but It's probably within two or three thou, it just seems way tolerant because of how long the screw is. Any play whatsoever would drastically show up with a screw that long. I could be wrong but I bet much tighter than that and youd have some binding issues. 🤷
@robertswaine6096 I didn't think of a half nut but you're right it could do the trick 👍
@@A_Stereotypical_Heretic The first (broken in shipping) nut could do the trick.
MW, we need more people like you in the world. thx
5:50 the term is "chilled", when casting, iron if it cools down too quick, it chills and hardens in that particular spot.
This used to be a big issue before carbide tools were a thing.
It also indicates that they run very little machining margin for their castings.
Brilliant.
Very enjoyable presentation of what you did to improve the machine.
Such an interesting video! On my recent trip to China I couldn't help but notice various chinese brands of home air conditioners and also automobiles, many of which I was told are well respected, quality brands, that exist there but non existent outside China. What we see here in North America are generally low cost imports, and the quality reflects that.
The chinese are perfectly capable of producing quality products, but we usually look to them for cheap stuff, so that's what we get. There was a time when Japan, then Taiwan, were known for cheap junk too.
German stuff was junk after the war we used to call it Gerry built they made some good cars and bikes in 80s and 90s they went back to very dear junk after 2000😊
That is one of those units you buy as a kit/project. I think the only way you are going to get accuracy out of it is to mill a screw and make a bronze nut for it. Its easier than it sounds and you can remove all the slop.
Thank you for another great video Mathias👍 I always learn things from you🙂
Wow, Vevor is not showing good QC. That's unfortunate since they are bringing a lot of industrial machinery to people that couldn't afford it before. Great work on the lead screw and finding all of the issues.
The man who used to do his “precision” machining with an angle grinder has become the precision machinist persona at whom he once scoffed. Welcome to quality workmanship. Wait until you get a good lathe, one that doesn’t sound like dragging a steel garbage can on asphalt!
Very interesting. I don't follow all the details about why this surface does that, etc., but it is fascinating seeing you modify and attempt to improve the precision of your tools. Thanks for sharing.
I bought one of those tables a year ago with the idea that it would only be good as a raw casting, I did end up re-machining all of the important surfaces and re-scraping the ways as I am using it as a sort-of precision slide. The lead screws are not very nice, but functional enough for the purpose.
I have 3 of them. Modifications to Screws, nuts, and bushings for screws. And full screws for the x and y it just about takes 2 to make 1 and the Unsupported screws don't help it's why i made them full screws and took the table endplates for x and y put a bushing for the screw in them and added it to the other as well and made better Gibbs is how i got mine working. I have 2 tables that have cave of a hole in them. They did nothing to help me beyond sending me a replacement one that was as bad if not worse then the 1st. Then when i complained about the same issues, i got $40 and that was it. I am out $250, for 2 got one for free as a replacement and only got 1 useable one after sever modifications. This is more of a project if you buy one. Good video on you, hope you have better luck.
I have this same table. I was pretty happy with it, because my expectations were zero.
I would say you got along surprisingly well without a lathe. I surprised you didn’t get one sooner!
Next time, specify all parts shall be 100% Chinesium!
That being said, your analytical talents enabled you to add more value to the finished product than what you started with. I look forward to your further adventures in machining!
I have a vevor bandsaw, and it was an absolute nightmare setting up. Nothing from the factory was remotely accurate. But once i got it set up, it works quite well!
Great video, I really love your closing comment, cheers!
Life of a DIY mechanist. Most machines from china are treated as assembled kits. Rough casting in need of finish machining. Have you heard of “metal scraping” to Finish in a machine? Adam Booth, Keith Rucker and Keith Fenner. Mr Pete 222 also May more answers . You’re on the right path. Thanks for sharing
I know it was cheap, so we can't expect too much from it... But this level of carelessness is just insulting! I almost bought a vevor lathe but changed my mind after seeing a lot of videos about the quality of vevor tools and machines...
Great Job!!! Winky's workshop Channel has a video called ; improving the lenght of the vevor mill table and one changing both lead screw, but he used RH threads..i have same table but i will change to Acme 5/8-8 LH, but have to chamge dials to Inches..keep posting!!
Thank you Matthias - the man who taught us to bring metalwork precision to woodwork.
China produces hundreds of thousands of tons of badly made and badly packaged junk every year. Buyers send it back for refund or - even worse, a replacement, which is just as badly made as the one sent back!
It's true that the branded version of this milling table will cost 3 - 4 times more and still be made in china, but like the iphone it will be made under strict western company supervision.
The Chinese can produce quality.
Yes, that is amazing why you haven't bought a lathe years ago! Specially a guy like you!
As with many offshore machinery tools... they're just a kit in a box, waiting to be semi-perfected! :D
If you run into a bent shaft like that, a couple of V-blocks, an arbor press and a dial indicator is the way to go. Bump, turn, read, repeat!
Seeing as you now have a leadscrew nut split longitudinally, use the half with the most meat on the thread and put it up against the leadscrew so that there is no or very little play against the thread and bolt it down. Then make a block out or hard wood, or metal if you have some, and place it against the leadscrew on the opposite side to the half nut and use it to push the leadscrew tight against the nut so that all the play is taken up. Unless you are trying to force a half inch cut it should make everything more accurate for what you want to use it for. On older lathes they used a half nut on the lead screw for moving the carriage along the bed. HTH
Just slather some beyond its use date grease on the lead screw. Job done.
That's a great idea
If you can swing it, would love another table analyzed. Comparing the cost and quality is amazing to me. My mill has a very worn table but I work around it.
Your milling table was packed in really strange packaging for that weight. I have the same type table (bought for one project), but mine was packed in plywood box secured with metal clamps. Table elements like handwheels and fixing nuts were packaged in plastic bag inside. I'm glad You managed to fix everything. :)
Matthias veering into machine tools and precision. Amazing. Next thing you know he'll be scraping and all sorts :)
I hope we don't have another channel with scraping ala Keith Rucker
Very helpful presentation. IMO 10:51 That backlash on the cast nut I found was unfortunately necessary. On a similar table I tried to reduce it and found that without the slop in that nut the leadscrew would bind at some point in its travel due to the wobble in the leadscrew.
yes, they have a lot of slop both ends of the lead screw, because some are bent right from manufacturing
Nice work! I too have had a Vevor adventure and fixed something brand new.
You can make it much more accurate by purchasing a DRO - digital read-out and installing it on both axis. That way you do not rely on cranking the handle but on a digital scale.
Vevor does carry a DRO kit in their store and they might be willing to sponsor a video of you installing it on this table ;-)
I just looked and Vevor is sold out of the 2 axis DRO. It costs more than that X-Y table does too. So the other option is to just get a couple cheap digital calipers and screw them to the table. Which is what I'd do if it were me.
Ummmm, lipstick on a pig.......
Or (and this feels like a pretty Matthias solution), make your own DRO from the mechanism of one of those cheap digital calipers.
@@hobbifiedWell, that is exactly what I did for my Russian made table lathe. Bought a 4 inch digital calipers and a 12 inch plastic digital one and mounted them on my lathe. One day I will get "proper" [knockoff] DRO ;-)
Sometimes there are products/tools that is better buying good quality used ones even if they need repair, than new cheap ones. My dad has a small metal workshop, the lathe and milling machine were bought used, they needed repairs/rebuilt but at least we got good stuff.
I also do not know how I got on without my metal lathe and milling machines. They are so useful for making tools, jigs and parts for wood working.
Nice one Matthias! Super interesting and highly revealing!
i bought vise from vevor, and its great, not a single flaw with it, and for that money, paid 106 euros for it
I have a mini lathe and tried to align everything. The problem is that it produces so many vibrations while cutting that it vibrates itself lose.
I bought one of these last summer, but due to medical issues never got to it. Time to check mine out!
That is Hilarious! Great you got it working at the end. Your bending reminded me of me having to bend several rods and the lead screw straight on my cheap CNC machine. You might have succeeded the bending without / with less weakening the material, these cuts look quite deep.
I would love to see a series of Matthias buying cheap tools and showing what it would take to get them close to the quality of the more expensive ones
You can straighten any shaft in your lathe. Chuck the bent end in the three jaw, then put a DTi on the end. Rotate the shaft around to find where it goes high and tap it down a little, check the run out with the Dti again and repeat until the runout is .001 or less.
"How did I ever get on without a metal lathe?" I wondered the the same thing.
And then I got a 3D printer. *wow*. Just...wow.
Thanks for this review! I was considering purchasing one, but now I'll need to reconsider.
I honestly think they are cast, but your forming hypothesis makes sense.. I have 3 broken vises with various casting defects. A sodium hydroxide bath followed by phosphoric acid treatment revealed many cracks on one of them. The cast iron is not homogenous, going from malleable iron to super hard and brittle white cast iron that eats cobalt and even carbide bits.
I have one and love it, but mine wasn't dropped and I don't use the scale. I took it all apart, cleaned and deburred, then reassembled and really took time to adjust the gibs.
Great job brining that milling table to greater precision and insightful observation into the market which Venor is shooting for. Am I right in guessing you will use your drill press to mount the milling table and the quill shaft to hold the cutter? If so, does your drill press exhibit a runout to complement the increased accuracy of the milling table?
I bought one of those x y tables. They pretty much suck. You did some things I didn't think of. I may have to revisit it again. Might be able to get it good enough for the drill press. Might try to make a brass nut for it too. At some point the returns are diminishing.
Loved this! Great explanation Matthius
The metal Lathe is the heart of the shop. Now take lessons from Mr. Pete (tubalcain on UA-cam (Your UA-cam Shop Teacher). His early Lathe videos are best for new comers. I on the other hand was lucky enough to pick up a 1950's 13" Atlas lathe for 700.00. Great machine. Cheers
There is a way to fix the nut to help the backlash situation.
Cut the nut about a 1/3rd along with a hacksaw or band saw.
now with a 2 piece nut you can shim them apart to remove the extra backlash.
All you need to do then is drill a couple of holes for a steel dowel pin or the end of a clean drill bit shank to prevent rotation. Or perhaps a couple of cap screws to hold the nut in opposing corners? It will make a pretty big difference
Then a simple task of make a couple of thin clamp plates for the sides to hold them together tightly clamping the shims.
That last sentence sounded as foreboding and exciting as any I've heard 😉
I had not watched this video, but did just watch most of the "why the hate" video and when you said "they are building to a price and the quality is what it is" I came to see what that "price" was. in the UK it's saying £91 !! For a milling table that's only about 0.05mm out of true - no-one can legitimately complain at that. Considering buying it myself now as I've had cause to need a lateral milling table a couple of times.
I love this kind of videos
3:08 yeah threads are usually rolled at industrial scales, leaves less waste, since it moves the material arround instead of cutting it.
4:52 basically how straightening is done with a press too, the tools are usually a bit more sophisticated but yeh the principle is the same (althought idk if you really needed those relieve cuts, never seen it be done on the straightening press)
I'm glad that you were able to make these discrepancies known. for a machined item that was ridicules!! I'm not an engineer, but I can appreciate the extent you went thru to make that atrocity even workable. the only thing that would justify that kind of aborted craftsmanship if it were at a give away price. to compensake one's ego to have to "Machine the thing to make it work. well done Matthias! I sincerly hope they watch this video.
For what most jokers are going to try to use that table for none of it matters. The problem is Mathias wanted to use the table for what it's meant to be used for. Which is work positioning. For that it is less than fit for use. They don't work as milling tables either but they're not supposed to. That's what everyone that buys one of those tries to do with it. Why that doesn't work is complicated. But it just don't.
Matthias, it's great to see you finally making your way into precision metalworking! I've often thought that if you had a lathe and a mill, you'd rule the world.
Honestly, you can completely ignore the handwheel dials if you install digital readouts for each axis. iGaging linear scales would be a good, inexpensive solution. I use them on my lathe, and they've been plenty accurate and repeatable for my needs.
This is pretty much my experience with tools straight out of china: they are okay-ish if you spend some time fixing all the things their (non-existant) QA missed. Worst case you end up with broken parts but generally it's just a matter of re-assembling it making sure all the corners are square, loctiting all the screws so they don't vibrate out and doing a couple of test pieces to find out where the lack of precision comes from and fixing those.
If you do that, the tools are fine, but for about half the price of a "locally" produced thing if you don't want to pay too much but have the time it's a fine product, as long as you take the shortcomings into account.
cheap tools are the most expensive
I just love the paleolithic approach Mathias gives to machining.
Is the X and Y perpendicular? I think you can work around everything else. When I was a kid I used to mill in one-direction to avoid slop from backlash on worn machines. It was not sensible to find a machine which didn't have backlash, and it varied along the length of the screw, because the screw at the centre of the table was far more worn than at the ends. You did have to watch the friction else the bit could "climb" your piece and suck the whole table along with the piece into the cutter.
I have actually been quite impressed with the robustness and quality of the Vevor products I have bought in the past. I haven't, however, bought anything like a machinist tool or anything that requires any sort of precision. But I am a bit surprised surprised at how consistently bad that lead screw is.
Your videos always amaze me!
Thank you!!!
Matthias, you could tighten up the threads in that lead screw block by slicing the block in half (90 degrees to the screw axis) and then drilling and tapping for two lash screws with jam nuts on them. This would pull the two 'halves' of the threaded block together and give you infinite adjustability of the drag on the lead screw, getting rid of that slop in the screw/block fitment.
because the acme threads are cast, I expect there is variation in their width. A stiff spring might be needed. e.g., after slicing it in half, pull it together with a tension spring. The thickness of the bandsaw blade should have removed enough material to let the spring clean up the slop. Also as machines age, the thread thins more in the center. IMHO, you can account for backlash in machines, but the laziest fix would be a digital readout. I would also check that crossfeed for... square. X and Y might not be perpendicular.
I have had similar issues on Vevor and auto parts when buying from Amazon. Some parts I returned cost me to return (one nearly 1/2 the cost of the product) even though I am a Prime member. Amazon has, IMO, a buyer beware site.
Pretty nice that a mill table in this price range comes with a split lead screw nut. Fancy! 😂
It is not a mill table. It is an X-Y table. There is a difference. I know it looks like a mill table but it just ain't. Melt a bunch down and maybe you can make a mill out of them then? 20 of them would weigh as much as my mill does. I just have a benchtop mill too. You'd need a lot more to make a knee mill.