I’m 66years old and now retired but not a day goes by were I don’t learn something new. I don’t watch TV UA-cam is my only source of entertainment and education. A great deal can be gained by watching people like yourself who take time out to make these videos. Thanks very much for sharing your knowledge. 👍
The boss I did my apprenticeship under taught me that the day you think you know everything, is the day you know nothing. I'm 62 yrs old and still learning something new every day.
Perfect English and speaking at a comfortable speed, I don't need to see the video twice to understand what's going on because your presentation is perfect! I think you're the best so far! And very good safety advices throughout. Thanks and Subscribed!
"Surefire way to end your day by picking a hacksaw blade out of your spleen"... LOL You do such a great job of stressing safety with a slight touch of humour so people will remember the lesson. Your machining videos are fantastic - most clear, easy to understand I have ever found. Great for small-machine hobbyists (like me).
Thanks you, for your feeds, I don't think you can't imagine the effects your stream has made, I bought a mini lathe BB22-1A, bbmtco, what ever that means, but just enjoying, what you're teaching, than you ma'am.
Quinn, as always fantastic explanation and demonstration. I've watched virtually all your videos and had to come back to this one for a refresher. Shiming the cutoff blade was something I missed. Soda can is on the bench now getting dissected. Thanks again.
This is my new favorite machining channel - Clickspring stopped explaining what he's doing years ago (and hasn't posted any videos in months) and while TOT still has a place in my heart he doesn't pack nearly the amount of information in that you do. Great production values, great writing, sound quality is good too.
I learned parting using rocker toolposts. And HSS tools of course. Just three more dimensions of difficulty (dementia of difficulty). That was in the 1980’s. Parting tools and tool holders have all improved to the point where parting is predictable nowadays. That’s all I have to add. Bondihacks video is nothing less than the best instruction for parting with HSS tooling. At the shop we have moved on to carbide insert tooling and we have never looked back. Great vid Blondihacks. I am impressed how some ‘hobby’ people know their subject from one end to the other, just out of the love of doing.
No more sweet sorrow. After following your directions I was able to part using the parting tool for the first time. Slower the speed, the better. Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Something as simple as your advice with the safety button at the beginning of this video. Advising to hit the button a few times just to get used to it. I bet very few people ever would do that, but they should. Excellent the safety advice.
Thanks Quinn. I really like the way you teach. I have been around toolrooms for almost 40 years and never thot of shimming the sides of the blade in the holder. It only makes sense. I repost your videos sometimes to Home Hobby Machine Shop and Tools. I consider you one of the better teachers for the home hobbyist. Thanks again.
After watching dozens of your videos, I just had to look up the history of the expression “Bob’s your uncle.” Interesting history but have to say “Fanny’s your aunt.” is just too funny. Hands down, you have one of the best machining channels on UA-cam. I have learned so much over the few months on how to appropriately us my Little Machine Shop lathe and mill. Thanks for you time and effort, it shows brilliantly through your videos and content.
Thank you, thank you, thank you Quinn. I have been battling and failing at parting off on my mini lathe ever since I inherited it, to the point that I had simply given up. I had searched the interweb and UA-cam and tried many solutions to no avail. One day I discovered a channel called Blondihacks (insert anjelic chorus here) and my world changed forever. While cruising your back catalogue and soaking up the knowledge generously provided, I discovered your advice to shim my hss parting blade. Voila! This turned out to be the holy grail I had been searching for. I used my tweaked tool today and it worked perfectly, just like the big boys do it. 😁 You even inspired me to post my first ever UA-cam comment. Thanks heaps for your excellent videos Quinn and stay safe in this crazy time.
Hey I just came across this video last night and I was out into the shed today. Did my first successful parting operation in 30 years! Ok I did take 25 years off. My old lathe doesn’t have a lot of positives going for it in the parting department. The golden nugget for me was that the parting tool holder is machined square vertically and the blade I have is tapered. I always thought the holders were made to deal with a tapered blade. Some quick measurements and a pice of paper folded twice (.020”) and I’m making nuts and washers Ok I also slowed it down to my slowest speed without using the back gear. I’ve been cutting stuff off with a hack saw for the last 5 years. I still need to work on the free play on the slides but hey what a leap forwards. Thank Ms Hacks :)
Thank you thank you Gwen! I've done parting more than a few times... but I watched this because I don't know what I'm doing! Now I feel like I do. Thank you so much! One of these days I'm going to watch your threading video again and try that for the first time.
With your excellent instruction, I've just managed to part a 1 inch piece of steel on a 7x14 Sieg mini-lathe. I'm on day 4 of ownership of my first lathe and I'd be really stuck with out your excellent videos. I'm so grateful you take the time to create such clear and informative content.
Great vid. Wish I had seen it when I was learning at a machine shop school. I was instructed on the parting operation. There was some difficulty positioning the tool in relation to the work. The instructor instructed to extend the angle cross slide to get more room. Half way through the operation the angle Cross slide broke in half. He said he should not have told me to do that. We all learned at the expense of the lathe. I never did parting that way again. I guess that is why the call it school. that was 40 years ago.
This is a great lesson. I’ve blown up a parting tool before. Not only is it very noisy, but scares the daylights out of you. After this lesson, no more scary parting. Thank you Blondie!!!
After watching every other video on parting I learned a lot but still was having trouble parting without chatter drama. Watched your video and went out to the shop and calmly parted a piece of 1½ inch mystery steel with out a hitch. Thanks for the video and your careful unambiguous guidance. Parting does not have to be sorrowful after all!
Great video Quinn. You are the first person to mention that a shim can help with the flat and t parting blades. One thing I have done in setting the parting blade height is to adjust it to the part that was faced off as it shows the dead center of the spindle. The reason I have done that is that my progressive bifocals don't cooperate when I try to get my head in the right position to align the tool with the live center in the tail stock. Thanks again for the great tutorials. I have been making chips for a short while and am always picking up some great tips.
Thanks for this entire tutorial series. I'm considering moving beyond my woodworking tools to a dedicated lathe and mill. The level of detail, logical structure and personable style to your videos is a model for everyone to emulate.
Some great points. I was doing my first partings the other day. Unfortunately - I was working on a 2 foot long bar through the headstock - but that end was not confined to center. Registered the 4 jaw chuck to < 1 thou. ...HOWEVER - that was the STATIC position. But in running, the far end was flexing and inducing a harmonic. The cutting got scary real fast - and explained why the facing and turning was so poor. Got halfway through the parting cut and decided to finish with a hacksaw. Was a good learning experience - gotta make more tools for this guy. Finishing off the cut off piece went very well and confirmed the centrifugal force issue. Mine is a 1953 Logan 920 11" x 24". Found one in very nice condition - but stripped it totally down and cleaned, refined, replaced and painted. And it still works, ... LOL. And as you said in a video - one needs to take the size and weight into account. I am working by myself and moving this around and getting the legs under this 700 pound hunk of iron required some real jig work. Enjoying your excellent tutorials...
Your parting demo was as smooth as it could be. You part with the best of them. It is scary but as long as you do EVERYTHING as you stated in your tutorial it’ll go just fine. I’ve made chatter, I’ve shattered blades, I’ve bound up my lathe and it’s all scary but as long as you take your time and do it right it can be very satisfying. Especially when you get it right and it’s new to you. It’s a definite moment of marching pride. Machining is all about pride for me. I am a big time perfectionist and just knowing the precision and all that is there even when it doesn’t need to be make me a happy camper.
Following up: I've had problematic experience with parting to the point that I have deferred model steam engine projects because it required parting of small parts (such as eccentrics). Today I tried parting with a insert parting tool and the lathe chattered so badly tools were jumping off the lathe bench. I had been visiting this channel off and on and thought I would see what there was about parting. After watching I went down to the lathe and set up as instructed and the difference was amazing. No chattering! Nice long chips (steel round bar), and a beautiful finish. I can't wait to start on a steam project! Thank you!
This women dominates what is typically thought of a MALE profession. It is clear to me, she does NOT have to go so slow in her demonstration, but I am thankful she does. This lady is AWESOME.
Isn’t she though. Shri is one of the best teachers I’ve seen on UA-cam period! Even though I know all of this so far I am enjoying the hell out of watching her tutorials and I’ve even picked up a few tidbits and it’s a great refresher.
I used to suck at parting (still not great) so I would use the parting tool to start the cut, go as far as I dared, and then finish with the hacksaw. This created a nice, accurate shoulder for gauging the squareness of the saw cut. Quinn is the best teacher out there!
Thanks very much. Your attention to detail is fantastic. Your delivery is excellent. I think this is the best video I have watched on this subject, and yes, I have watched many.
One thing....I always set the blade height at or just a few thou under center....never above. I've found the initiating of any death chatter results in a shattered blade far more likely with the blade above center, even just a little. Below means the blade bounce doesn't wedge the blade deeper into the stock on the swing out of the diameter. This provides more warning to back out of the cut before the blade breaks.
I just started working with a lathe and this video is so very informative. Thanks for sharing the knowledge. In my brief experience, the biggest contributor for problems is tools that aren't sharp enough. For woodwork I depend upon razor-sharp chisels and the lathe tools are no different. There's a jig for sharpening chisels on diamond stones. I think I'll make a rolling jig to sharpen my parting tools, and maybe some of the other tools, on those same diamond stones.
After watching this one a few times and having the parting blade fly out of the holder. Made some adjustments to the holder as the blade didn't stay put. Think I got it now, parted off a couple thin discs with no issues. Thanks Quinn keep those videos coming
Parting really can be such sweet sorrow,seems like the more you do the more careful you get I guess you remember all the ways it can crah on you. As always good content thanks .
I've waited literally years and all of the sudden (over a couple years time) I got a very old sears 7 X 12 and it's missing some parts but usable for some turnings and ordered a NEW mini in the same size from Grizzley tools.
I know very little about machining and the more I watch of this series the more impressed I am. This is just the sort of thing someone like myself needs to get off on the right foot. Occasionally you do refer to something you haven't fully explained before (e.g., the compund - what it that?) but I can figure that stuff out from other sources. Thanks for the excellent videos!
That was very thorough, well done! When I first got my small cnc lathe some fifteen years ago, I used to avoid parting by buying blanks cut to length. Then a tool company rep told me I should be parting off in the lathe to save the cost of having my material cut up. This crazy man was talking about parting at 2000 rpm! I had not experienced insert parting tools before and what a difference. I routinely part at 3000 rpm in brass and aluminium. Carbide parting inserts do not jam up on the sides as they are wider at the cutting edge than any where else. The shape of the cutting edge is designed to create a chip that is narrower than the groove so they do not tend to jam in the groove. The insert I commonly use has rake of 30 degrees which is great for small lathes as it reduces the power required for the cut. Even in my centre lathe which is much larger and slower, the same tools still work brilliantly. There is no way, I would even consider using HSS these days. Can be more expensive than HSS, but well worth it for myself anyway.
Parting on the lathe, it's like a horror movie. Even after all these years, when I have to cut a piece, it's always creepy. Full anxiety. But that anxiety helps not to make mistakes. Greetings, from Buenos Aires, Argentina.
This is your best technique video. One thing, I have one of the cheap 7x14 lathes, but it parts pretty well AFTER I got my setup dialed in. It's a cheap lathe so it took a little work, but it was worth the effort.
Thanks Quinn I may actually try parting agin, having had the parting blade explode a couple of times was more than exciting. I think I now know where I went wrong, everywhere. Great explanation
You have a lot of great tips I wish I'd learned years earlier. You point out that the cutting edge has to be perpendicular to the parting blade to prevent side thrust making it curve and bind, and separately, that some tapered parting blades have a top rake. It's been my experience that the top rake provides a side thrust that makes them tend to bind, and kaboom, hence my preference for the t-shaped parting blades you use.
Yes watched, listened, learned - 3 top tips speed, lube and set-up. Just parted 40mm (1.5 inch) dia blue steel on my 8 x 16 mini lathe - previously I broke a high speed 12mm parting tool on brass!
Thanks for the help I need. your videos are fantastic. I have a lathe thats older than Moses with babbit bearings but I love it. My stand up bracket on my portable band saw helps every time. lol.
Hi Quinn, I do quite a lot of parting on my Harrison M300 and it's in good condition. Everything single thing you have said here is so valuable for beginners. However, a couple of additional things that I do:- 1. I use a height gauge to set my tool heights when it really matters, like parting off. (I actually keep a budget model permanently set rather than keep unboxing my Moore & Wright beauty). Worth noting is that the top face of the cross slide needs to be a consistent good surface, clean and undamaged, alternatively is the method of bringing the tool tip in contact with a straight piece of shim against the side of the chuck, even a couple of thou off of centre will see the shim be 'not vertical'. 2. The second thing I do, particularly with larger diameter stock is to use a travelling steady. It prevents (or should if set right) deflection and saves wear on the spindle bearings. 3. If I have a deep cut to make (large diameter) then I start the blade not extended to it's fullest depth required and extend as needed. (mine are Dixon toolholders so blades are 'flat' not generally angled upwards. I agree about hand feeding, it gives most feedback even though my machine has very slow feeds available I always have my foot on the emergency brake bar as that is a real instant and total stop of the spindle, the other hand is on the feed engage lever ready to drop it out.
This is great! I just burned out a belt on my little lathe this morning doing a parting operation. When a replacement belt arrives i will try again following these directions, thank you 😄
Holy crap Quenn, your awesome girl! Just found your channel and impressed with your videos and the ton of information you seamlessly pack into them. You really know your stuff and offer a fresh new alternative to channels like mrpete222 and This Old Tony. Soooo, congrats to you and look forward to more of your fine work. Booyah!
Thanks for this, very well presented, all these little tips are way helpful, things I have not even thought much about, just hearing them sticks them into my mental tool box. I'm a little less horrified by parting, especially in my large Goodway lathe I'm rebuilding. Maybe next time I won't resort to the hacksaw in frustration.
For small hobby type lathes a back tool post really helps due the improved geometry where the cutting forces are directed down towards the lathe bed rather than lifting the tool away from the bed when parting from a front tool post.
A very well explained and demonstrated video as usual Quinn. I fully understand it's a complex subject and you can't hit every possible scenario or example without a video taking forever to film and watch. At some point in another video it might be worth mentioning that fully parting off with the end outside the chuck supported by a tail stock center is a REALLY bad idea. I watched one YT video last year where that was done with a very long shaft because the person doing so didn't know enough to not even attempt it. You can of course part most of the way through that way and finish with a hack saw. Oddly it must have been beginners luck because it some how worked for him without any drama. If I tried that just once at the minimum the head stock would probably get ripped off and body appendages I highly value would be thrown every where. I always recommend one book no matter how much experience a person has including professional machinist's. The Model Engineer's Workshop Manual written by George H. Thomas. And yes it is that good. The Ebay reseller bandits all want a fortune for it. Cheapest is to order it direct through Tee Publishing in the U.K. and they ship world wide. He goes into great detail about parting on the light weight Myford Super 7 lathe and logically explains just why the solid rear mounted parting tool position works so well. One side benefit is that other than for large diameter work where it might cause interference the parting tool is always ready to go and doesn't need any tool changes or setting up. The books full of tips and tool making designs for various lathe additions that are usually only seen on the higher end tool room lathes such as his lever operated threading tool holder, or the same for the whole top slide for single point threading like the Hardinge HLV has. There all designed for those Myford lathes. But for anyone with enough experience none of them would be that tough to redesign to adapt and work on other lathes. The whole point of those rear mounted tool posts beyond the extras they provide in that position is there very rigid and remove the flimsy top slide from the issue. One of the main reasons I bought the same lathe as you have is due to Mr. Thomas's writings and that tee slotted cross slide. Afaic his well thought out design for a between centers boring bar is worth the price of the book just for it.
Congratulations ! this is a very very good explanation on WHY I was having problems "parting off" your in depth explanation did not fall on deft ears ! THANK YOU ! though I heard all this before the important thing is Parting is Picky work on a lathe Tighten the gibs and sharpen the tool ! and don't be in a hurry ! way to go Blondy !.....Bob...
Thanks for the video. I've "only" shattered one parting blade, so far, in the 3 years I've owned a lathe. It taught me to be a lot more careful in my setup. Coke cans are my usual shim stock, .004"+-, I'm cheap!
As a neophyte to machining, I appreciate the details in your instruction and look forward to your other videos. I only use the lathe and mill as a tool to support projects I'm working on so my skill set is limited but this has proved very helpful. Thanks again for sharing. P.s. I've added you to my subscriptions
Fascinating, educational, and enjoyable to watch (I love your sense of humour!)! I don’t even have a lathe, but still love absorbing information about machining in general. A brilliant video, thank you Quinn! On the point about using a powered cross-slide, I guess the other disadvantage of that is you presumably want to start going more slowly the closer you get to the centre of the stock as the surface speed will slowly be reducing - that, or slowly increase the rotational speed. But either way, it seems hand feeding is the best approach, for a hobby shop machinist at least.
Hi Blondihacks, you are obviously a very knowledgeable machinist.As an ex auto lathe setter we always ground a slight angle to the face, it is a single point tool after all not a form tool. Try it you might be surprised.
Thanks Blondie Hacks. Could have used this video years ago. I have painfully learned these techniques through trial and error. Wish I would have watched this video first.
The shim behind the T-blade! I hadn’t thought of that! I’m so sure that neglecting this has been the reason for some of my... um... ah... well, let’s just say that my blade stock is a bit shorter that it used to be. :-) Thanks for sharing this info!
Bim, Bam, Bob's your uncle.. HA HA HAHA....Beauty,,and brains...! Great tutorial and helpful hints keep up the good work Quinn.. I am enjoying this channel thoroughly... Izzy
I’m 66years old and now retired but not a day goes by were I don’t learn something new. I don’t watch TV UA-cam is my only source of entertainment and education. A great deal can be gained by watching people like yourself who take time out to make these videos. Thanks very much for sharing your knowledge. 👍
Excellent! The day I stop learning is the day (I hope) they put me in the ground. Glad you're enjoying my videos! 😀
@@Blondihacks Agree completely. I am 73 and take the time and money to learn new things everyday. Life-long learner!
The boss I did my apprenticeship under taught me that the day you think you know everything, is the day you know nothing. I'm 62 yrs old and still learning something new every day.
I’m 29 but I also agree. I learn a lot more of UA-cam than doom scrolling on Facebook or tick tok.
Perfect English and speaking at a comfortable speed, I don't need to see the video twice to understand what's going on because your presentation is perfect! I think you're the best so far! And very good safety advices throughout. Thanks and Subscribed!
😮
"Surefire way to end your day by picking a hacksaw blade out of your spleen"... LOL
You do such a great job of stressing safety with a slight touch of humour so people will remember the lesson. Your machining videos are fantastic - most clear, easy to understand I have ever found. Great for small-machine hobbyists (like me).
Thanks you, for your feeds, I don't think you can't imagine the effects your stream has made, I bought a mini lathe BB22-1A, bbmtco, what ever that means, but just enjoying, what you're teaching, than you ma'am.
Thanks!
Quinn, as always fantastic explanation and demonstration. I've watched virtually all your videos and had to come back to this one for a refresher. Shiming the cutoff blade was something I missed. Soda can is on the bench now getting dissected. Thanks again.
There are many machinist videos which are very interesting on UA-cam; but you are definitely the best Instructor of Machining.
Thanks for all your work and videos. I was just sharpening my parting cutter. Thanks again..
Fantastic, new to machining on a Myford Super 7, I was struggling with parting. Watched the video and now no troubles at all 🎉
This is my new favorite machining channel - Clickspring stopped explaining what he's doing years ago (and hasn't posted any videos in months) and while TOT still has a place in my heart he doesn't pack nearly the amount of information in that you do. Great production values, great writing, sound quality is good too.
Thank you! That’s high company to be compared to. ☺️
Love this lady - managed to part off steel bar after many failures over the years. Not to mention the great tips in Quinn's other topic videos.
I learned parting using rocker toolposts. And HSS tools of course. Just three more dimensions of difficulty (dementia of difficulty). That was in the 1980’s. Parting tools and tool holders have all improved to the point where parting is predictable nowadays. That’s all I have to add. Bondihacks video is nothing less than the best instruction for parting with HSS tooling. At the shop we have moved on to carbide insert tooling and we have never looked back. Great vid Blondihacks. I am impressed how some ‘hobby’ people know their subject from one end to the other, just out of the love of doing.
No more sweet sorrow. After following your directions I was able to part using the parting tool for the first time. Slower the speed, the better. Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thank you for such a detailed video. Tons of tips that will help make lathe work run smooth!!
Something as simple as your advice with the safety button at the beginning of this video. Advising to hit the button a few times just to get used to it. I bet very few people ever would do that, but they should. Excellent the safety advice.
Thanks Quinn. I really like the way you teach. I have been around toolrooms for almost 40 years and never thot of shimming the sides of the blade in the holder. It only makes sense. I repost your videos sometimes to Home Hobby Machine Shop and Tools. I consider you one of the better teachers for the home hobbyist. Thanks again.
Thank you! I really appreciate the sharing and reposting. It helps grow my channel. 😁
I learned so much from this video. You are so articulate. just wow.
This is hands down THE BEST video on parting on the internet, bar none! If it still weren't so damn scary I'd love parting now! Thank you, Quinn!
Aww thanks! So glad I could help
After watching dozens of your videos, I just had to look up the history of the expression “Bob’s your uncle.” Interesting history but have to say “Fanny’s your aunt.” is just too funny. Hands down, you have one of the best machining channels on UA-cam. I have learned so much over the few months on how to appropriately us my Little Machine Shop lathe and mill. Thanks for you time and effort, it shows brilliantly through your videos and content.
Thanks for the lesson after i had the experience, new gears and parting blade on order. No injuries.
Thank you, thank you, thank you Quinn. I have been battling and failing at parting off on my mini lathe ever since I inherited it, to the point that I had simply given up. I had searched the interweb and UA-cam and tried many solutions to no avail. One day I discovered a channel called Blondihacks (insert anjelic chorus here) and my world changed forever. While cruising your back catalogue and soaking up the knowledge generously provided, I discovered your advice to shim my hss parting blade. Voila! This turned out to be the holy grail I had been searching for. I used my tweaked tool today and it worked perfectly, just like the big boys do it. 😁 You even inspired me to post my first ever UA-cam comment. Thanks heaps for your excellent videos Quinn and stay safe in this crazy time.
Awesome! Glad I could help! 😀
Hey I just came across this video last night and I was out into the shed today.
Did my first successful parting operation in 30 years!
Ok I did take 25 years off.
My old lathe doesn’t have a lot of positives going for it in the parting department.
The golden nugget for me was that the parting tool holder is machined square vertically and the blade I have is tapered.
I always thought the holders were made to deal with a tapered blade.
Some quick measurements and a pice of paper folded twice (.020”) and I’m making nuts and washers
Ok I also slowed it down to my slowest speed without using the back gear.
I’ve been cutting stuff off with a hack saw for the last 5 years.
I still need to work on the free play on the slides but hey what a leap forwards.
Thank Ms Hacks :)
That’s great! Glad I could help 😄
i know it's a recurring comment - you're very good at explaining things - that makes you better than a teacher, and more like a machining coach.
Thank you! Kind words are always welcome. ☺️
Thank you thank you Gwen!
I've done parting more than a few times... but I watched this because I don't know what I'm doing!
Now I feel like I do. Thank you so much! One of these days I'm going to watch your threading video again and try that for the first time.
I apologize- I didn't get your name right Quinn! And I can't blame it on my phone mishearing me this time; it was me mishearing you.
I also mumble. 😬
With your excellent instruction, I've just managed to part a 1 inch piece of steel on a 7x14 Sieg mini-lathe. I'm on day 4 of ownership of my first lathe and I'd be really stuck with out your excellent videos. I'm so grateful you take the time to create such clear and informative content.
I just want to say that this lesson in parting was life changing. I can part things now I dreaded before. It's all about turning the RPMS down.
Bob Ross of machining, happy little chips
Great vid. Wish I had seen it when I was learning at a machine shop school. I was instructed on the parting operation. There was some difficulty positioning the tool in relation to the work. The instructor instructed to extend the angle cross slide to get more room. Half way through the operation the angle Cross slide broke in half. He said he should not have told me to do that. We all learned at the expense of the lathe. I never did parting that way again. I guess that is why the call it school. that was 40 years ago.
This is a great lesson. I’ve blown up a parting tool before. Not only is it very noisy, but scares the daylights out of you. After this lesson, no more scary parting. Thank you Blondie!!!
Believe it or not but you made my day today. This video series are invaluable. Keep doing so well.
I am thoroughly enjoying your videos on Machining. You are very experienced, and a great teacher!
Great video and explanation. Parting is the scariest operation for a manual lathe particularly for a beginner. It is a black art. Thnaks for sharing.
Thank you for the kind words! I agree it's the trickiest thing to learn, early on.
After watching every other video on parting I learned a lot but still was having trouble parting without chatter drama. Watched your video and went out to the shop and calmly parted a piece of 1½ inch mystery steel with out a hitch. Thanks for the video and your careful unambiguous guidance. Parting does not have to be sorrowful after all!
Great video Quinn. You are the first person to mention that a shim can help with the flat and t parting blades. One thing I have done in setting the parting blade height is to adjust it to the part that was faced off as it shows the dead center of the spindle. The reason I have done that is that my progressive bifocals don't cooperate when I try to get my head in the right position to align the tool with the live center in the tail stock.
Thanks again for the great tutorials. I have been making chips for a short while and am always picking up some great tips.
That's a great tip! The facing cut doesn't lie as to where the spindle's center line is, so that's bound to give good results!
I know this is an old video but this had the most helpful tips I've ever encountered on UA-cam. Thank you
Thanks for this entire tutorial series. I'm considering moving beyond my woodworking tools to a dedicated lathe and mill. The level of detail, logical structure and personable style to your videos is a model for everyone to emulate.
Very welcome! You should definitely give machining a go. You'll love it!
i just got an old lathe artec C1 . with tour help i got it up and running werry well.
thanks from denmark Blondie .🤓
I simply adore watching interesting, engaging and passionate teaching on EVERY subject.
Some great points. I was doing my first partings the other day.
Unfortunately - I was working on a 2 foot long bar through the headstock - but that end was not confined to center.
Registered the 4 jaw chuck to < 1 thou.
...HOWEVER - that was the STATIC position. But in running, the far end was flexing and inducing a harmonic.
The cutting got scary real fast - and explained why the facing and turning was so poor.
Got halfway through the parting cut and decided to finish with a hacksaw.
Was a good learning experience - gotta make more tools for this guy.
Finishing off the cut off piece went very well and confirmed the centrifugal force issue.
Mine is a 1953 Logan 920 11" x 24".
Found one in very nice condition - but stripped it totally down and cleaned, refined, replaced and painted.
And it still works, ... LOL. And as you said in a video - one needs to take the size and weight into account.
I am working by myself and moving this around and getting the legs under this 700 pound hunk of iron required some real jig work.
Enjoying your excellent tutorials...
Thank you for all your great teaching videos! Your the best!
Your parting demo was as smooth as it could be. You part with the best of them. It is scary but as long as you do EVERYTHING as you stated in your tutorial it’ll go just fine. I’ve made chatter, I’ve shattered blades, I’ve bound up my lathe and it’s all scary but as long as you take your time and do it right it can be very satisfying. Especially when you get it right and it’s new to you. It’s a definite moment of marching pride. Machining is all about pride for me. I am a big time perfectionist and just knowing the precision and all that is there even when it doesn’t need to be make me a happy camper.
Excellent tutorial thank you!
Following up: I've had problematic experience with parting to the point that I have deferred model steam engine projects because it required parting of small parts (such as eccentrics). Today I tried parting with a insert parting tool and the lathe chattered so badly tools were jumping off the lathe bench. I had been visiting this channel off and on and thought I would see what there was about parting. After watching I went down to the lathe and set up as instructed and the difference was amazing. No chattering! Nice long chips (steel round bar), and a beautiful finish. I can't wait to start on a steam project! Thank you!
This women dominates what is typically thought of a MALE profession. It is clear to me, she does NOT have to go so slow in her demonstration, but I am thankful she does. This lady is AWESOME.
Isn’t she though. Shri is one of the best teachers I’ve seen on UA-cam period! Even though I know all of this so far I am enjoying the hell out of watching her tutorials and I’ve even picked up a few tidbits and it’s a great refresher.
I used to suck at parting (still not great) so I would use the parting tool to start the cut, go as far as I dared, and then finish with the hacksaw. This created a nice, accurate shoulder for gauging the squareness of the saw cut. Quinn is the best teacher out there!
I still do this lol.
Quinn I find you do a great job on lots of detailed information on all your videos.
Well done.
Excellent detailed instruction
Thanks very much. Your attention to detail is fantastic. Your delivery is excellent. I think this is the best video I have watched on this subject, and yes, I have watched many.
Thank you for another excellent video, that shim hint was worth the price of admission for me. :)
Virginia Hoffman I was very happy when I learned that one also. 😁
Your video are AWESOME!!! Thank you for all the details!!
One thing....I always set the blade height at or just a few thou under center....never above. I've found the initiating of any death chatter results in a shattered blade far more likely with the blade above center, even just a little. Below means the blade bounce doesn't wedge the blade deeper into the stock on the swing out of the diameter. This provides more warning to back out of the cut before the blade breaks.
This is Tina Belcher all grown up as a machinist. Love the vids good work.
As someone brand new to this I really appreciate the way you go through the basics.
Excellent! Welcome to my channel and thanks for watching!
This video series is one of the best of seen on this topic. Thank you for making these!
Don't underestimate your ability as a machinist, you are expert in my opinion.👍
Gracias Quinn tus enseñanzas son oro para mi
I just started working with a lathe and this video is so very informative. Thanks for sharing the knowledge. In my brief experience, the biggest contributor for problems is tools that aren't sharp enough. For woodwork I depend upon razor-sharp chisels and the lathe tools are no different.
There's a jig for sharpening chisels on diamond stones. I think I'll make a rolling jig to sharpen my parting tools, and maybe some of the other tools, on those same diamond stones.
After watching this one a few times and having the parting blade fly out of the holder. Made some adjustments to the holder as the blade didn't stay put. Think I got it now, parted off a couple thin discs with no issues. Thanks Quinn keep those videos coming
Excellent, -- Clear, precise, articulate. Brilliant, thank you.
I now announce the arrival of any anticipated event with... "Yahtzee!" No one knows why, but I do. Thank you, Quinn!
Thanks Quinn
Parting really can be such sweet sorrow,seems like the more you do the more careful you get I guess you remember all the ways it can crah on you. As always good content thanks .
That's the truth! Every tip in this video is something I did wrong at some point in the past. 😀
I finally find an amazing machining tutorial series. Now... if I could just afford a lathe and mill!
I've waited literally years and all of the sudden (over a couple years time) I got a very old sears 7 X 12 and it's missing some parts but usable for some turnings and ordered a NEW mini in the same size from Grizzley tools.
I know very little about machining and the more I watch of this series the more impressed I am. This is just the sort of thing someone like myself needs to get off on the right foot. Occasionally you do refer to something you haven't fully explained before (e.g., the compund - what it that?) but I can figure that stuff out from other sources. Thanks for the excellent videos!
That was very thorough, well done!
When I first got my small cnc lathe some fifteen years ago, I used to avoid parting by buying blanks cut to length. Then a tool company rep told me I should be parting off in the lathe to save the cost of having my material cut up. This crazy man was talking about parting at 2000 rpm! I had not experienced insert parting tools before and what a difference. I routinely part at 3000 rpm in brass and aluminium. Carbide parting inserts do not jam up on the sides as they are wider at the cutting edge than any where else. The shape of the cutting edge is designed to create a chip that is narrower than the groove so they do not tend to jam in the groove. The insert I commonly use has rake of 30 degrees which is great for small lathes as it reduces the power required for the cut.
Even in my centre lathe which is much larger and slower, the same tools still work brilliantly. There is no way, I would even consider using HSS these days. Can be more expensive than HSS, but well worth it for myself anyway.
Parting on the lathe, it's like a horror movie. Even after all these years, when I have to cut a piece, it's always creepy. Full anxiety. But that anxiety helps not to make mistakes.
Greetings, from Buenos Aires, Argentina.
Just saw this video....Really great information as I just had some problems on parting off custom size flat washers.Your help saved the day for me.
Parting makes much more sense now :)
Excellent video. Good production values and great advice. I've watched a lot of videos on parting, and this is probably the best.
Thank you, this had so many of my issues addressed. You rock, keep it up.
This is your best technique video. One thing, I have one of the cheap 7x14 lathes, but it parts pretty well AFTER I got my setup dialed in. It's a cheap lathe so it took a little work, but it was worth the effort.
Excellent video as always. Keep up the great work.
🤗
This clears lots of things up. Thank you.
Had to watch this over 2 days. It was well worth finishing. Great tips
That's good news! I was worried about the length, but I'm glad it was worthwhile.
Thanks Quinn I may actually try parting agin, having had the parting blade explode a couple of times was more than exciting. I think I now know where I went wrong, everywhere. Great explanation
That's great! Go for it! I have shattered enough blades to learn this stuff the hard way, so I hope I can help someone else out.
Great one. One of the best parting tutorials i have seen on youtube...
Thanks Quinn, great video on parting. I have used it for training my apprentices. Fantastic educational piece.
Wow, that's great- thanks! Glad I could help! 😄🎓
You have a lot of great tips I wish I'd learned years earlier.
You point out that the cutting edge has to be perpendicular to the parting blade to prevent side thrust making it curve and bind, and separately, that some tapered parting blades have a top rake. It's been my experience that the top rake provides a side thrust that makes them tend to bind, and kaboom, hence my preference for the t-shaped parting blades you use.
"Your rigidity has to absolutely be on fleek" 😂
And in English as opposed to American?
Parting is such sweet sorrow!?
LOL!
I’ll see myself out now. 😆
Wow, such a crystal clear explanation. I'm ready to give it a try again, thanks!
Go for it! You can do it!
Yes watched, listened, learned - 3 top tips speed, lube and set-up. Just parted 40mm (1.5 inch) dia blue steel on my 8 x 16 mini lathe - previously I broke a high speed 12mm parting tool on brass!
Thanks for the help I need. your videos are fantastic. I have a lathe thats older than Moses with babbit bearings but I love it. My stand up bracket on my portable band saw helps every time. lol.
Nice descriptions of various parting tools. Snapped off quite a few in my early days.
Thank you! The snapping of parting blades is never a dull moment.
Hi Quinn, I do quite a lot of parting on my Harrison M300 and it's in good condition. Everything single thing you have said here is so valuable for beginners. However, a couple of additional things that I do:-
1. I use a height gauge to set my tool heights when it really matters, like parting off. (I actually keep a budget model permanently set rather than keep unboxing my Moore & Wright beauty). Worth noting is that the top face of the cross slide needs to be a consistent good surface, clean and undamaged, alternatively is the method of bringing the tool tip in contact with a straight piece of shim against the side of the chuck, even a couple of thou off of centre will see the shim be 'not vertical'.
2. The second thing I do, particularly with larger diameter stock is to use a travelling steady. It prevents (or should if set right) deflection and saves wear on the spindle bearings.
3. If I have a deep cut to make (large diameter) then I start the blade not extended to it's fullest depth required and extend as needed. (mine are Dixon toolholders so blades are 'flat' not generally angled upwards.
I agree about hand feeding, it gives most feedback even though my machine has very slow feeds available I always have my foot on the emergency brake bar as that is a real instant and total stop of the spindle, the other hand is on the feed engage lever ready to drop it out.
This is great! I just burned out a belt on my little lathe this morning doing a parting operation. When a replacement belt arrives i will try again following these directions, thank you 😄
Great! I hope this helps! There's a lot of nuance to this topic, for sure.
Holy crap Quenn, your awesome girl! Just found your channel and impressed with your videos and the ton of information you seamlessly pack into them. You really know your stuff and offer a fresh new alternative to channels like mrpete222 and This Old Tony. Soooo, congrats to you and look forward to more of your fine work. Booyah!
Aww thanks! I’m honored to be included in the company from whom I have learned so much.
Thanks for this, very well presented, all these little tips are way helpful, things I have not even thought much about, just hearing them sticks them into my mental tool box. I'm a little less horrified by parting, especially in my large Goodway lathe I'm rebuilding. Maybe next time I won't resort to the hacksaw in frustration.
That's great! I'd love to restore a large machine someday. Glad I could help!
For small hobby type lathes a back tool post really helps due the improved geometry where the cutting forces are directed down towards the lathe bed rather than lifting the tool away from the bed when parting from a front tool post.
A very well explained and demonstrated video as usual Quinn. I fully understand it's a complex subject and you can't hit every possible scenario or example without a video taking forever to film and watch. At some point in another video it might be worth mentioning that fully parting off with the end outside the chuck supported by a tail stock center is a REALLY bad idea. I watched one YT video last year where that was done with a very long shaft because the person doing so didn't know enough to not even attempt it. You can of course part most of the way through that way and finish with a hack saw. Oddly it must have been beginners luck because it some how worked for him without any drama. If I tried that just once at the minimum the head stock would probably get ripped off and body appendages I highly value would be thrown every where.
I always recommend one book no matter how much experience a person has including professional machinist's. The Model Engineer's Workshop Manual written by George H. Thomas. And yes it is that good. The Ebay reseller bandits all want a fortune for it. Cheapest is to order it direct through Tee Publishing in the U.K. and they ship world wide. He goes into great detail about parting on the light weight Myford Super 7 lathe and logically explains just why the solid rear mounted parting tool position works so well. One side benefit is that other than for large diameter work where it might cause interference the parting tool is always ready to go and doesn't need any tool changes or setting up. The books full of tips and tool making designs for various lathe additions that are usually only seen on the higher end tool room lathes such as his lever operated threading tool holder, or the same for the whole top slide for single point threading like the Hardinge HLV has. There all designed for those Myford lathes. But for anyone with enough experience none of them would be that tough to redesign to adapt and work on other lathes. The whole point of those rear mounted tool posts beyond the extras they provide in that position is there very rigid and remove the flimsy top slide from the issue. One of the main reasons I bought the same lathe as you have is due to Mr. Thomas's writings and that tee slotted cross slide. Afaic his well thought out design for a between centers boring bar is worth the price of the book just for it.
Great info, thanks!
Gosh this video made me nervous! Love the series!
Thank You! Very informative!! Small details make a huge difference. I will put them in practice when I attempt parting..
Glad I could help! Thanks for watching!
Congratulations ! this is a very very good explanation on WHY I was having problems "parting off"
your in depth explanation did not fall on deft ears ! THANK YOU ! though I heard all this before the
important thing is Parting is Picky work on a lathe Tighten the gibs and sharpen the tool ! and don't be in a hurry !
way to go Blondy !.....Bob...
Thanks! Glad you liked it!
Thanks for the video. I've "only" shattered one parting blade, so far, in the 3 years I've owned a lathe. It taught me to be a lot more careful in my setup. Coke cans are my usual shim stock, .004"+-, I'm cheap!
As a neophyte to machining, I appreciate the details in your instruction and look forward to your other videos. I only use the lathe and mill as a tool to support projects I'm working on so my skill set is limited but this has proved very helpful.
Thanks again for sharing.
P.s. I've added you to my subscriptions
Excellent, thanks for the subscription and for your thoughtful comment!
Fascinating, educational, and enjoyable to watch (I love your sense of humour!)! I don’t even have a lathe, but still love absorbing information about machining in general. A brilliant video, thank you Quinn!
On the point about using a powered cross-slide, I guess the other disadvantage of that is you presumably want to start going more slowly the closer you get to the centre of the stock as the surface speed will slowly be reducing - that, or slowly increase the rotational speed. But either way, it seems hand feeding is the best approach, for a hobby shop machinist at least.
Hi Blondihacks, you are obviously a very knowledgeable machinist.As an ex auto lathe setter we always ground a slight angle to the face, it is a single point tool after all not a form tool.
Try it you might be surprised.
Thanks Blondie Hacks. Could have used this video years ago. I have painfully learned these techniques through trial and error. Wish I would have watched this video first.
The shim behind the T-blade! I hadn’t thought of that! I’m so sure that neglecting this has been the reason for some of my... um... ah... well, let’s just say that my blade stock is a bit shorter that it used to be. :-) Thanks for sharing this info!
That tip was a big learning for me too. I forget where I picked up that trick, but I had to pass it along. It really helps.
Bim, Bam, Bob's your uncle.. HA HA HAHA....Beauty,,and brains...!
Great tutorial and helpful hints keep up the good work Quinn..
I am enjoying this channel thoroughly...
Izzy