My BEST Chinese lathe UPGRADE
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- Опубліковано 26 вер 2024
- In this video I eliminate the lathe cross feed backlash, reduce the spindle backlash. I replace the ball bearings of the front headstock with roller bearings. Installing thrust bearings in cross feed.
Headstock bearings alii.pub/6jgqxd
Thrust bearings alii.pub/6jgqxy
Stl files for the bearing covers drive.google.c...
At first I was very impressed. I saw spindle bearing retainers that looked like actual oil seals.
That is the real problem with roller bearings. It does not matter how little play you achieve. They will constantly fill with metal fillings. The true fix is to seal the bottom of the housing, fit actual metal bearing retainers with true oil seals, put a oil level window in the housing and fill it 1/2 full with oil. This also solves the high/low gear lubrication issue. without that, offset sealed bearings would be a better option but they cost $100
After dissembling 20+ spindles and trying many options I have found that a $22 set of made in Japan deep groove NACI bearings will achieve as good if not better tolerances that you show in this video. Then install a grease zirk right above the 2 interior gears in the spindle head. get a small grease gun fill with white lith grease and you can lube the gears without disasembly.
My very thoughts!!
That would be ideal. Good idea
I built an all steel micro lathe in the mid 60's and it has taper roller bearings in the headstock with oil seals in the housings at the outside..........the insides of the bearing housings are open and the headstock casing is sealed to allow oil to be in the bottom of it......the oil level is 10mm deep and .a ring lubricator around the spindle dipped in the oil and lubed the 2 bearings as the spindle rotated......I've been using it for the last 50 years.
BTW, you can get double row angular contact bearings that have seals.....I have 2 on my milling machine spindle.....25mm ID X 52 OD......no adjustment needed as they are preloaded, lubed and sealed for life.
I love running a lathe. You can doing just about anything with one. And you make it look easy. Good video.
Very much like the "We can do that better" channel. I think having a few text messages explaining what you are doing would be nice.
I've done the roller bearing upgrade on a few different machines now, it makes a world of difference. I have a C6 10 x 20 based home CNC conversion that only had roller bearings in the chuck end, a home built CNC mill that uses a mini mill headstock, and a 1958 9 inch Logan lathe. It's like night and day. The surface finish and accuracy on the lathes improves dramatically. The only thing you have to watch is preload resistance and rolling resistance due to the wider rollers displacing the grease. A really lightweight flouroelastomer spindle grease is your friend for packing these bearings. The heavy stuff used for wheel bearings will eat up horsepower and lower your spindle speed.
One hybrid option is a roller bearing on the chuck end and an angular contact on the other end if you want to reduce some drag but the dual roller bearings are extremely stable and pretty inexpensive. Good angular contact bearings are pricey.
@sourand jaded That's like $29 USD. If they're Japanese, German or Swiss that's a really good deal. I've had very mixed experiences with Chinese AC bearings.
I like AC bearings for high speed spindles and especially spindles that use paired AC bearings at either end. So two paired bearings on either end, four bearings total. That gives you low bearing resistance but great spindle stability. But in this case I'm thinking of applications like Hardinge toolroom lathes or high speed mills.
@sourand jaded You got a deal!
6:11 What could possibly go wrong. Despite, that I hammer the safetyrules into my pupils, and telling them to never ever wear gloves at any machine with turning parts, if finally happened a few years ago... One person did wear gloves, the exact same type as you wear there, and lost half a finger... Torn off... So all be careful, pride comes before the fall.
On a lighter note: "Thank you for the great video"
Had a incident with gloves, happened very quickly.
I HAVE BEEN USING USING TWO PRE LOADED TAPER ROLLER BEARING IN THE FRONT AND ONE PLAIN ROLLER BEARING AT THE BACK WITH EXCELLENT RESULTS.
This would be a lot more watchable without the incessant drum beating in the background. Is that really necessary?
Turn your volume off....done and done
Angular contact bearings are the same thickness makes it a lot easier, anyway love your upgrades thank you.
Did you use single or double angular contact bearings?
@@capman911 Single but you can use double row as well.
True but they tend to cost a lot more.
@@HyperactiveNeuron They are about $30 each here in Australia which is no big deal.
Having researched mini lathes many little things can make a big difference.
Such as metal drive gears and the feed for both X and Y axis not using the outside diameter of the lead-screw if possible .
Also acceptable play and a means to adjust play are paramount.
I always compare any lathe to the Colchester lathes l used to use .
Hope you and your loved ones are safe. Take care.
Really like your work on the mini lathe! Have to change the bearing on my machine too and also think to install tapered gibs on the carriage :) Thanks for sharing!
I appreciate seeing this. I just saved a lot of money.
I'd avoid the habit of wearing gloves around machinery, even if it is "just" a drill press. Safety first. If it needs holding more securely, use a drill vice.
Machines, parts, you can replace. Your body parts are a little less expendible.
Only fools wear gloves around machinery!!
@@robertbutler8004 That also goes for cleaning rags/towels. These are too a no no on running machinery. Use a brush for removing swarf with the machine running.
Thanks now I will fix by bench press by first checking changing the bearings. Nice work.
invest in a deadblow, also cover your inner race in a wet papertowel, microwave it. if you want even more clearance throw your spindle in the freezer first in a bag. cool video.
I feel like microwaving steel is bad lol. Why can't you just use a torch?
wow that's some precision work man!
well done!
Wouldn't it be a lot more honest if they sold their machines as a kit of parts... for you to finish and put together!
After all that is what most of the buyers of these contraptions end up doing (to get usable tool).
Like your upgrades - subscribed
Why should they be honest when they get fools to buy as is
"They" market these mini lathes to people like me - no prior machining experience, unsure if using a lathe will keep me entertained for more than a few weeks - who are intimidated by the thought of assembling a machine which might take your fingers off or send metal parts flying at high speeds. Pure hobbyists, in other words. I am in the market for a lathe, because I want to try something new at an age where others retire, and I cannot even dream of a decent quality lathe, which I estimate in the medium-to-high four figure price range. I envy people who know more about the whole subject, but here I am.
@@TheBipolarBearOh, don't you know you're supposed to just be born with a full machine shop in-tow? Who needs 'beginner lathes' at a good dabbling price, right? :P
@@jackpijjin4088 Shame on me for not knowing that. I guess I also fully deserve people telling me that my poverty disgusts them. 🤪
The tea needs to be hotter... Good video - thank you.
Very good video, I look forward to making the upgrades on my 7x12 Craftex model, thanks for posting!
4:00 a much improved upgrade for sure, nice work !
8:49 nice.
we all crib about the chinese lathes but pound for pound they cannot be beat ,I myself have had many and cannot complain, you get what you pay for ,they can make them better with roller bearings but its all down to cost now you have upgraded yours as would the manufacturer , but as to cost
I have the harbor freight version of this. Thanks for the ideas.
For a "standard" owner of a mini-lathe this is a great video. It makes the lathe better but, of cource, not best. I assume that you have taken the lathe from its regular position otherwise you should consider bolting it something heavy. Greasing "system" is good enough for this type of product. Pls carry on.
Solder crush test add or subtract .002 for preload. (Depending on selective shim location.) Just like the TRBs in a transmission. Awesome video BTW.
Cu tot respectul, alama se prelucrează cu unghi de tăiere negativ al cititului sau burghiu .👍
Check the pre-load after you use the lathe for a while. Plastics tend to creep.
I hate drilling brass and aluminum it always wants to grab and try to kill me.
Regrind the drill tip geometry so that there is zero angle in the longitudinal plane and then it won't grab ever again
You can wind those tapered bearings up tighter than what you have done to reduce the main shaft movement to less than 2 thou. Have done same on an Emco Compact 8
Did you grease those roller bearings ?
I like your upgades. Thanks for share it
Thanks!
agree with the others, very impressive work/mod, one of the best I've ever seen.!
The thrust bearings on the cross slide are nice but you still have backlash fron the rod and nut poor tolerance.
When you own a lathe, everything looks like a diy project. Lol.
Truly...it does...lol. you start to look at bearings or motor shafts and think..."is it REALLY worth paying for someone else to make one?"
@@NeoIsrafil you can mill with one too, if you hold the endmill in a collet in the nose of the spindle. Use the cross slide as your x. Carriage is your z.
I almost lost a finger doing what you did at 6:11. NEVER use gloves with any rotary tool 😢
Wow im french and say Nice !!!
I would have not used plastic spacers for the timkin bearings, you should have used arbor shims to prevent deformation.
1:51 CX Bearing made in China for a Polish seller.
You got a thumbs up for me….no question, great work, but man! You really need a bigger/better lathe, at least 10” swing. And maybe something that you can’t rock with one hand? Then you’d be unstoppable!
Nice modifications
nice work , Ive done similar thing on my lathe too
GRANDIOSO !!!!!!!!!!!!!!!!!!!!
Если между коническими подшипниками поставить втулку с точно обработанными торцами, жесткость шпинделя увеличится в разы. Один минус - запаришься его собирать-разбирать для примерок.
Нужно изготовить втулку из свинца и с ней отрегулировать затем разобрать изамерить размер после обжатия свинца и изготовить стальную сразу в размер -время сэкономиш
Where can I buy this little tap wrench that has the guide on it where you put it in the lathe or the mill it's very nice.. I make a few thousand of them and sell them.
very satisfying video 😍
Nice ! ❤ love machines😉👍🇧🇷🇧🇷 like 3.4K 👏👏👏👏
Nice video, thanks for share!
8:53 It looks like your whole gauge is moving so the needle hardly moves. That gauge needs to stay rock solid to get a proper measurement.
some words would be nice!
Love them vids! Keep at it!
How do you lubricate the tapered roller bearings ?
Hi Congratulations, your videos are fantastic.
And thanks for sharing the stl.
I wonder, why did you add an additional thickness of about one/two mm behind the first bearing of the Spindle? what does it have to compensate for?
Is that printed too?
Sorry for all these questions but I'm new and I want to make the same changes to my lathe.
Rất nhiều video hay ❤
I used angular bearings and has very little run out
great work !!!
Thank you
Made in China fixed in America. I have done it many times.
Good starter lathe!
great video with lots of good tips. Have you released the 3d printer files for the bear seats?
The link is in the description of the video
so good
are you using the lathe with that spindle play?
I see that you “tried” to lube the bearing. But when you installed the race it looks to have covered the hole. Was it offset or did it just look like that on the video?
What is the diameter of the chuck？100mm or 125mm?
100
tapered bearings are not suitable for high and fast rotating lathes.suitable is the closed face bearing.
Still no repacking the bearings? Don't expect them to last.
01:03 How about plastic gears do you think replace them? I heard that plastic gears will break in this lathe.
I will not replace the plastic gears, they serve as protectors against more serious breakdowns. Better buy some spare plastic just in case
es verdadera escuela.
Can you share the stl files for the bearing covers you printed?
drive.google.com/drive/folders/19aP3tOtGQFNVvU389yPeWK6U5EaFjmJZ?usp=sharing
Is there polish eagle on Chuck? 9:55 or Im creazy?
This is a Polish coin
I know nothing about lathes so I'm wondering, is it true so many commentors have said it's cheaper to buy a better quality ( non Chinese) lathe than replace bearings etc? I would assume everything ( motor, gears, switches, lathe body etc ) would be better quality making it much more expensive.
That is to be debated. first answer would be yes but then comes in reality. A true lathe currently made in USA would be very hard to find if it even exists. If it does the price would be at least 5 to 10 times higher. The second option is an old made in USA lathe. Then if the bed is not worn out or rusted you still have to rebuild it end to end to include a modern motor. Still plenty of work and money. Next up is a quality import, likely a knock off of a US lathe and made in Thailand. Yes, that is your best bet but only if you have $4K and the room for such a lathe. also consider this, by the time you fix your mini Chinese lathe, you will actually know how to use a lathe and it fits in your garage, even upstairs in an apartment.
Have to ask-have a chinese-lathe whit a problem that i hasnt seen anyone mentioned-i struggled whit getting the compound to be stable,finaly i measured the ways back and front,and they are not even..the back way is thicker at tailstock-end and front is thicker at chuck end,so need to do some grinding on the underside of the ways- has anyone come across this before? -the compound "pinches in the back on a long workpiece,and pinches at the front near the chuck..had to tighten and schim the brackets on the underside in a weard way,now it's managble,but quite hard to turn the handwheel
Making a lot of parts on a lathe that you have torn all apart
Nice upgrades. Spindle deflection of 0.05mm seems a big high, is that due to the spindle shaft flexing ?
I think yes
For this sort of thing, I like a single row angular contact bearing. Use a sealed one and you don't need to go into the whole oiling thing. I like the 7202 B 2RS TN Sealed Angular Ball Bearing 15x35x11mm type.
Fantastic
You were my hero until I saw you use channel locks.😢😢😂😂😂😂
Ha, just seen it at 4:47 🙄
Don't wear gloves using rotating machinery and don't hand hold parts on a pillar drill.
A great video apart from the cringeworthy safety.
why did you change into a new black spindle flange?
_What is the blue goo at _*_4:47_**_?_* 🤔
Bearing grease
Файно!)
How do you know when the tapered roller bearings need a shot of lube without a visual inspection, lolz?
I add a little lube before every job
Ich habe eine Frage was hast du für ein Motor in deiner drehbank ❓❓❓meiner hatt 550 w Drehzahl ok aber keine Kraft mfg Uwe
I suggest a dumpster instead of new bearings
I like how the chinese bothered with steel parts just to fill the machine with plastic gears :P
Those bearings need to be packed with grease before installation.
Ye kaha milega iska dham kitna hi my khareedna chahataahu
👌⚙️
The best Chinese lathe upgrade would be to trade it in on a European model.
So what are you doing? A little narration please!
no puedo creer que ustedes puedan comprar un torno donde lo mas importante que son los engranajes sean hechos de pastico . ustedes son unos -----------
Plastic gears are the best in this machine
An upgrade of chinese quality is use hig quality bearings and not use Tapered roller bearing
If you're going to wear gloves they have to be all rubber they cannot have any fabric inside the rubber just rubber it will tear.
I guess I don’t understand the economics of lathe manufacturing. The changes you made could easily be done at the factory. If roller bearings added $50 to the price, so what?
What amature holds parts by hand in a drill press?
😱Tapered roller bearings for main axle😱 are not a upgrade. And this tipe of bearings need a gap of installation, and not tigtening hard
All of the time, effort and cost that has gone into this, I'm really not sure it is worth it at all. It'd be better to save up and buy a better lathe. Having said that, as an exercise in what can be done though to build a better machine, I applaud your fortitude and dedication.
The entire point of this channel is to get views. It's not about the lathe, lol.
Find me a 'better' lathe that beginners, who mostly simply don't have the money, in the case of brand new, or the background experience to be able to do a sufficient assessment to know they're not getting a lemon, in the case of second-hand.
Okay, the US is lucky in that they have Precision Matthews who seem to do a fantastic job of QCing and improving the import lathes they buy, but for people living elsewhere, it's a bit of a crapshoot. Unlike in the US, where you seem to find well-cared-for South Bends at the local church jumble sale, tidy second hand machine tools are not that common elsewhere.
All you can do is find an importer who offers good aftersales backup and the 'better' end of the import machinery product spectrum (PM pick Weiss lathes for a reason). Then it's off to the stripdown-degrease-clean-deburr-gib-adjustment-bearing-change races you go.
Nobody who has the money for a well built, professional quality, small lathe buys a Chinese mini-lathe. Only people who don't sensibly have another choice buy them and fettling, upgrading and tuning them is part of the hobby.
grease in spindle bearings ??? plastic flanges plastic gears wtf is imma buy one for my kids when i have kids
Why not just wait and save a bit more and get a better lathe.
The use of deep groove bearings for axial loads in spindle is nothing but scam. All cheap Chinese ball screw supporting blocks come with deep groove bearings instead of dupIex pairs. I also encounter deep groove bearings in Sieg's spindles for several times. OPTIMUM machine came with roller bearings though so nothing to complaint about that.
These lathes aren't worth the trouble, they really aren't.