Once again thank you Winky for inviting all of your friends from around the world to come and visit with you in your shop, always enjoyable! I always enjoy learning something new.

@WinkysWorkshop

2 жыл бұрын

Your welcome... however, I made a second and it doesn't work as well and I'm not sure why. I'll figure it out and post my results. Thanks

An essential basic principle of welding often neglected by welders that I have seen on KZread, is to bevel one or both of the items to be welded. You welded a fillet weld and then removed most of it, leaving only what limited amount of penetration was created. Simply griding a bevel on the edge of the square stock produces a groove weld, which will be much stronger.

@WinkysWorkshop

2 жыл бұрын

Yes, and I knew better. Thanks. After making the video I installed a couple screws just to prevent failure. I'll be posting an updated version with plans tomorrow if you're interested. It's also welded but the weld size is not an issue and I also provided a relief for better penetration.

well it's a lathe kzread.infoUgkxN9zrzkkhnjUF5PQbuA_B1gYdsfCu9k6z but it wasn't what i would have anticipated. Headstock, tailstock, carriage apron are manufactured from aluminum now not cast iron. The spindle diameter for the bearings is too small allowing for a few play in the spindle so I am using some blue Loctite to take out the play.

@WinkysWorkshop

11 ай бұрын

True

Dang Winky that was a great video. You are definitely right about the guys who came before us being clever. I had a feeling that there was going to be a second YEE -- HA with the results that you achieved. Showing the concept behind it with the paper cut out was very effective.

@WinkysWorkshop

2 жыл бұрын

Thanks Andy! I can't figure out why the design got lost.

Great idea. I always have issues cutting off on my lathe. I'll have to give this a try. Thanks for sharing.

@WinkysWorkshop

2 жыл бұрын

You'll love it!

Holy cow! That turned out great. I'm inspired to build my own after seeing your results.

@WinkysWorkshop

2 жыл бұрын

Wait a week or two. I made a second and it doesn't work as well and I'm not sure why. I'll figure it out and post my results. Thanks

I liked your vertical sawing attachment. Very nifty. Also you did a great job of explaining your PT approach. Thankyou.

@WinkysWorkshop

2 жыл бұрын

Thanks! Be sure and check out the next follow up videos on the tool.

That’s good thinking and good work, well done and thanks for sharing Mark.

@WinkysWorkshop

2 жыл бұрын

Thanks Kevin.

WOW! This is for me the answer to cut off with a small lathe. Thanks

@WinkysWorkshop

2 жыл бұрын

Your welcome... the plans will be posted next weeks so check back

Thanks for this. I started watching this saga on the second video, then the third but now having watched the first I at last understand the reasoning behind this design. Obvious in hindsight but I needed to be walked through the idea as this video does. Much appreciated.

@WinkysWorkshop

2 жыл бұрын

I'm glad you went back. I probably should have repeated he info in part one in the second video.

Like that! Thanks for sharing 👍 🇬🇧

@WinkysWorkshop

2 жыл бұрын

Glad you enjoyed it

The important thing to remember about old timers is that they have crossed this bridge long before you got to it. The best way to cross it has already proved itself.

@WinkysWorkshop

6 ай бұрын

Certainly this is true most the time.

I like it too. That's just great, I can see an end to my parting off problems soon.

@WinkysWorkshop

Жыл бұрын

Hopefully, be sure and watch part 3

Perfect cut .

@WinkysWorkshop

2 жыл бұрын

Be sure and watch next video... its a better design

This is fantastic. Thank you.

@WinkysWorkshop

2 жыл бұрын

You're very welcome!

Works better than any I've tried. Thanks for the video

@WinkysWorkshop

5 ай бұрын

Great to hear. There is another video with a better tool and a link to the plans in the description.

Another fine project!

@WinkysWorkshop

2 жыл бұрын

Thanks Dave. Hey, something weird. I made a second tool like this and it chattered terrible and I could not figure out why... so I made a new design. It works great and it's much easier to make. I guess these things happen for a reason.

Great idea and build!

@WinkysWorkshop

2 жыл бұрын

Thanks!

Dang it. Another tool to build. Thanks a bunch.

@WinkysWorkshop

2 жыл бұрын

Your welcome. I'll post the plans next week.

Awesome work! Been following your parting exploits, and I agree this is the best one yet. I think I'll be replicating this somehow, for my 7X mini lathe. Cheers!

@WinkysWorkshop

2 жыл бұрын

Wait about a week. I just made a second one and it's not working as well. It's identical for the most part. I'll figure it out.

Gday Winky, this new parting tool works a treat, all the theory adds up, great job mate, Cheers

@WinkysWorkshop

2 жыл бұрын

Except I made a second one and it chatters??? Can't seem to figure out why... but I will. Thanks

Its on my list, thank you

@WinkysWorkshop

2 жыл бұрын

A new easier to make design will be posted tomorrow if you are interested. Thanks!

Great cut off tool build there mr. Winky. Thanks for the video.

@WinkysWorkshop

2 жыл бұрын

You bet! I hope you are feeling better!

Great video. Nice work. Great design. Thank you for sharing.

@WinkysWorkshop

2 жыл бұрын

Thanks, be sure and watch the follow up video

Worked very nice! Gotta make myself on of these!

@WinkysWorkshop

2 жыл бұрын

I've had some problems duplicating this tool but for now here's another video I made on cutoff kzread.info/dash/bejne/ent1s6qjqsrZacY.html

Great video, thanks for sharing.

@WinkysWorkshop

2 жыл бұрын

Thanks Ken!

Excellent! Going on the to do list

@WinkysWorkshop

2 жыл бұрын

I hope to have the drawings posted in about a week. Thanks

Looks like it works pretty good!!

@WinkysWorkshop

2 жыл бұрын

I agree. I was amazed.

Great job. I like that!

@WinkysWorkshop

2 жыл бұрын

Thanks!

Amazing!!!! Thanks for sharing again!!!

@WinkysWorkshop

2 жыл бұрын

My pleasure!

Finally I understand why that was designed like that. I never heard an explanation. You did a nice job making that.

@WinkysWorkshop

2 жыл бұрын

Thanks... I'll post a slightly better version and drawings Friday.

looks great ....... I'll add that to my todo list! Thanks for the info 👍👍😎👍👍

@WinkysWorkshop

2 жыл бұрын

I made a second one and it chatters bad and I can't figure out why. I'll figure it out but right now I'm stumped. I'll do a follow up. Maybe I'll have a more predictable design.

Mark, that was a nice little project and worked as expected, nice and smooth. Will have to keep that design in mind.

@WinkysWorkshop

2 жыл бұрын

I'll have a new design out Friday with some plans. The new design works better and it's a lot easier to make.

I just might have to make one, this is awesome

@WinkysWorkshop

2 жыл бұрын

Thanks Douglas. I actually have a new design that's easier to make and works a little better. The video will be posted tomorrow along with the plans. Thanks (2/4/22)

Something else I gotta build, great video winky, keep'um coming..

@WinkysWorkshop

2 жыл бұрын

You will be amazed! Thanks

Job well done!

@WinkysWorkshop

2 жыл бұрын

The next video is a better design if you are interested.

That's a good idea. I should give it a go one of these days.

@WinkysWorkshop

2 жыл бұрын

Thanks, I made another one and it doesn't work as well. Weird huh? I'll figure it out.

I got one of these when I bought an old Colchester Student. Originally I left it in the bin of parts ect that came with the lathe. I knew it was a parting tool holder, but I had carbide insert part off tools so I assumed it was redundant. After snapping so many inserts and breaking a holder I was getting frustrated and assumed the lathe was too old and worn out to do parting properly. After seeing this video and recognising the tool, I immediately tested it (HSS BLADE) and wow!! It just works beautifully! No grabs, smooth cut, even power feed! Medium lathe speed, slow cross slide feed, it just works so well. I have learnt not to assume now. Thank you very much for your content!

@WinkysWorkshop

2 жыл бұрын

Isn't it amazing that these methods get lost?

Nice project.

@WinkysWorkshop

2 жыл бұрын

Thanks!

Excellent. !!!!!!

@WinkysWorkshop

2 жыл бұрын

Thanks... there will be a new version posted Friday. It's easier to make and works well.

another great on Mark

@WinkysWorkshop

2 жыл бұрын

Glad you think so! There are two follow up videos with with an updated design if you're interested. They are easier to make and work better too.

Great work, thanks for that.

@WinkysWorkshop

2 жыл бұрын

Your welcome, I'll be posting an updated version with the plans tomorrow. It works great and it's also easier to make.

Dear Winky. Thanks a lot for this video! Cutting off always was russian roulette to me and I never got my head around the reasons. Now it's pretty clear thanks to you! Concerning the vibes on your second attempt: Well, it's about vibes - every single item in this world has got its inherent resonant frequency (frequencies to be correct) depending on the mass, ridgidity and geometrie. Change one part of the equation just a little and it changes everything. A dedicated engineer might be able to solve the equation for not hitting on for speciffic revs and diameter but it might be easier and quicker just to try out. The importent thing is, that the edge wont tend to jam anymore with this holder! You really made my day!

@WinkysWorkshop

2 жыл бұрын

Thanks for the comment. Yes you are exactly correct. Everything has a resonance and speed, feed mass, rigidity or flex are all part of the equation. On my new tool design I moved the point of flex toward the cutting edge. This makes the tool more reactive. It pulls out of the cut more when it deflects. I suspect trail and error is way easier than the math involved. Here's the second tool. It works GREAT! kzread.info/dash/bejne/pW2lxcZuXdrQY8Y.html

Very interesting. Thanks for sharing, Winky

@WinkysWorkshop

2 жыл бұрын

Your welcome - more to come

Wicked sharp idea. I also struggle with cutoff tool use so I will be looking for the drawings. Thanks

@WinkysWorkshop

2 жыл бұрын

You will be surprised but it will be a good one.

I am impressed to. and I like it too!

@WinkysWorkshop

2 жыл бұрын

Thanks

Looks awesome Winky!!!

@WinkysWorkshop

2 жыл бұрын

Thanks Danny!

Great Job Im Amaised! Winky

@WinkysWorkshop

2 жыл бұрын

Thanks

The feed rate was impressive. Nice job!

@WinkysWorkshop

Жыл бұрын

Thanks! The following video shows a newer version.

very well done ! thanks for the schooling ! Skip

@WinkysWorkshop

2 жыл бұрын

Thanks for watching!

I've got one of those Armstrong cut off holders, languishing in a drawer since I got my qctp. I'll have to break it out and have a go. Interesting vid, thanks Winky!

@WinkysWorkshop

2 жыл бұрын

Cool. Let me know how it does.

@thaumaturgicresearchcounci4180

2 жыл бұрын

Well, I dug it out and indeed it's an Armstrong but I guess an earlier model with no split, although the shape is similar with a tall section behind and above the blade. I could probably modify it with a split and to make it fit a qctp holder. No way would I go back to using the lantern holder that it's designed for!

@WinkysWorkshop

2 жыл бұрын

@@thaumaturgicresearchcounci4180 - They made one called a Goose Neck that basicly did the same thing. Maybe that's what you have.

I am impressed as well!!!. Too bad we aren't neighbors, I could easily teach you to weld since that was my primary profession for 40 years. I was a welding instructor. You could fine turn my machining. Great video down to earth and not complicated at all. Thanks so much.

@WinkysWorkshop

2 жыл бұрын

I'll have a new design with plans posted Friday. I'd love to have welding lessons! Ha Thanks for the thought!

Guess Armstrong knew what they were doing. Excellent!

@WinkysWorkshop

2 жыл бұрын

I agree. I have another video too. It has a better design kzread.info/dash/bejne/pW2lxcZuXdrQY8Y.html

i like it, i have had many mishaps parting, broken parts, broken tools, i like the look of this, a project may be on the cards

@WinkysWorkshop

2 жыл бұрын

Be sure and watch the following videos. I have a better design that is easier to make

Great job! Many greetings from Austria.

@WinkysWorkshop

2 жыл бұрын

Cool! Thanks!

Awesome pretty cool!!! Thanks

@WinkysWorkshop

2 жыл бұрын

Hello Don, How's that beast of a lathe holding up. Hope your doing well.

I have a couple of the Armstrong cut off tools and they have served me well. I really like your idea and will be making some. Great idea

@WinkysWorkshop

2 жыл бұрын

I made a second one and it doesn't work as well. Apparently I got lucky. I'll figure it out and post a second video. You might want to wait and see what I come up with. Thanks!

@chrisstephens6673

2 жыл бұрын

Were you still using power feed with the second. If speeds and feeds are correct, power feed gives a more equal load on the tool, hand feeding can be hit or miss allowing variable flex and cut.

@WinkysWorkshop

2 жыл бұрын

@@chrisstephens6673 - Yeah... I always use autofeed. I made a new holder design this morning. The same concept but much easier to make and works perfect. Video on Friday... plus plans.

Anxiously await the plans and material recommendations. Thanks.

@WinkysWorkshop

2 жыл бұрын

Unless something comes up I'll post a short video and the plans next Friday. Thanks for watching.

I've always had issues parting steel. Yours works great, have to give it a try!

@WinkysWorkshop

2 жыл бұрын

I redesigned this tool. It's more predictable and way easier to make. The video will be posted tomorrow with the plans. (2/4/22)

@BurtonsAttic

2 жыл бұрын

@@WinkysWorkshop I’ll be watching!

Excellent video... subbed.. nice idea on the band saw

@WinkysWorkshop

8 ай бұрын

Thanks, I made one more video on this also... a modification.

Very interesting project Mark!

@WinkysWorkshop

2 жыл бұрын

Thanks! I was surprised how well it works.

We had those Armstrong tool holders in high school shop class where almost everything was military surplus from WWII. The lathes and mills had brass plates stating they were US government property on loan to the school.

@WinkysWorkshop

2 жыл бұрын

Cool... love the old machines!

Nice work. You also could drill and tap and counter bore two screw on the weld side into your tool holder for additional holding power. To take some pressure off of the weld. Also the .500 x .625 is a great idea. I really like the holder. I think I'll make one myself. Great content. Thank you, EM.

@WinkysWorkshop

2 жыл бұрын

Great idea. I did this. thanks

Thanks for sharing. I too have problems parting off on my lathe. Would love to see an update after you've used it for a while.

@WinkysWorkshop

2 жыл бұрын

It's still working well but here's something weird. I made a second one and it chatters bad and I can't figure out why. I'll figure it out but right now I'm stumped.

No matter how carefully I plan, there's always something I overlook. Comforting to see you do this as well. I like your work. Nice video work too. Thanks.

@WinkysWorkshop

8 ай бұрын

Yes! Thank you!

@clintchapman4319

7 ай бұрын

That's normal, isn't it?

@WinkysWorkshop

7 ай бұрын

🙂@@clintchapman4319

I'm surprised it worked so well because of the thickness of the plate you used I'd have used 1/4" or 3/8" not 1/2" BUT it worked fantastic ! I tried a cutoff yesterday with my cheapo chinese cut off tool with a carbide insert in it .... you guessed it it grabbed and bent the bottom part and busted the insert... i said fooie on it and cut it with the HF band saw ! which works a treat now that I have your plate in it ! thank you.

@WinkysWorkshop

2 жыл бұрын

Cut off is tricky. Lots of variables. I made a duplicate of this holder and can't get it to do as well. I'll figure it out but it kind of surprised me.

I like it!

@WinkysWorkshop

2 жыл бұрын

Me too! Ha

I have a CVA 1A lathe (1960), it has the best cut off attachment point ever. the cross slide has a dovetail on top at the back so you can run a second toolpost or in my case I run a 1/8th inch Armstrong parting tool on it upside down permanently. It's the most rigid set up I've ever used on a lathe of this size. I have 50 years experience as a machinist/engineer and taught shop in a major UK university for 15 of those years.

@WinkysWorkshop

2 жыл бұрын

Running on the back side like that is great. My lathe is not really set up for that. Reverse is also good but a screw on chuck is a problem in reverse.

@arfamortis1

2 жыл бұрын

@@WinkysWorkshop Running it upside down at the back means you don't reverse for cutting, the bonus is the swarf just falls down into the tray.

@WinkysWorkshop

2 жыл бұрын

@@arfamortis1 Exactly, my lathe can not run in reverse AND it can not mount the tool on the back side. The cross slide is not sent up for it.

Very good video, sure was ver good, u r very creative did a very good job with all of the building, I would like to build one. I haven’t finished the other one u made first one u showed. Very good job

@WinkysWorkshop

2 жыл бұрын

Thank you very much! I'll be posting plans for a simplified version Friday.

Mark, that was awesome. I'm gonna have to make one as I'm working on a cutoff tool shootout video that compares various cutoff tools and holding setups. Gilles ;)

@WinkysWorkshop

2 жыл бұрын

Cool... here's something weird. I made a second one and it chatters bad and I can't figure out why. I'll figure it out but right now I'm stumped. If you make one and it works let me know.

Wow! Glad I watched this. Now I have to build one for my 9" Southbend. I like some of the suggestions below for attaching the 1/2" bar for the tool post; especially milling a shallow channel on the tool post side to set the bar in. Two flathead screws to fasten the bar to the tool holder and your golden. Looks like you made your holder out of cold rolled. Anyhow, you did an excellent job making this.

@WinkysWorkshop

Жыл бұрын

Thanks for watching.

I always enjoy your videos and your unique means to achieve a turning or cutting. I use the FOR by Eccentric Engineering which also uses the T shaped blade. While it is designed to be used in the QCTP it is designed to be used with the Lathe running in reverse so the chips fall out of the workpiece thus keeping the workforce clear of the removed chips thus minimizing the clogging and some of the risks to the tool digging in.

@WinkysWorkshop

2 жыл бұрын

I like the reverse idea or from behind but I have a screw on chuck and a cross slide that can't go from the back.

Wow, that's was impressive, it looks like I need to clone your cut-off tool, I've made many attempts to do cutoffs, I've purchased several types of tools looking for that magic tool, and have yet made a satisfactory cutoff on my lathe a 1935 Leblond 12" round top that I restored in 2018. This fall I took the headstock down, crossfeed, and apron complete down looking for something I missed in the restoration and have not found a smoking gun but, I made some minor improvements. It's back together now but I have had the heart to attempt a cutoff, my excuse is all the cutoff tools I have been wrecked. I do believe I will make your Armstrong tool first and then try it! Thanks, Wink!

@WinkysWorkshop

2 жыл бұрын

This tool works fantastic.... however, I can't seem to duplicate it. I made a second one and it chatters bad. Here's an older video I made on cut off. kzread.info/dash/bejne/dGqCr7twY8i1qLg.html

@WinkysWorkshop

2 жыл бұрын

This is how to make the tool holder kzread.info/dash/bejne/ent1s6qjqsrZacY.html

I've seen the Armstrong style cutoff tool with the flexion in it before but never used one. That turned out to be a very effective tool, I may have to try one of those at some point if I can't get my parting issues figured out on my import lathe, lol!

@WinkysWorkshop

2 жыл бұрын

Hello Everett, I have a new design I'll be posting tomorrow. It seems to work well and it's a lot more simple to make. Oddly, I made a second holder of this design and it acted like a tuning fork. Apparently the tool was slightly different in weight or rigidity but I never did figure out how to fix it. So far this new design is great!

Well shoot, that works well.

@WinkysWorkshop

2 жыл бұрын

I made a second and it didn't work as well... So far I'm not sure why! But I will figure it out. thanks for watching.

Nice work , I guess I need to build one too

@WinkysWorkshop

2 жыл бұрын

I'll have a new video posted tomorrow with a new (and better) design and the plans.

@ParsMaker

2 жыл бұрын

@@WinkysWorkshop I look forward to it, thanks

Learn something new every day. Interesting cut off tool holder. Regarding the welding, consider putting a generous chamfer on the square stock prior to welding. It will create a v-groove where the square stock lays up against the main body of the tool holder. Then you can weld into the v-groove and not worry about cutting off your weld later to provide good fit to the holder.

@brucke23

2 жыл бұрын

What I was thinking too.....

@WinkysWorkshop

2 жыл бұрын

Yeah, I knew better on the weld. I'll have an updated version of the tool out Friday. It will be way easier to make.

You may have been better off to cut a small 1/2" relief on the back of the tool and then use countersunk screws run into threads in the tool. The relief would take the torque and the screws would hold it tight.

@WinkysWorkshop

2 жыл бұрын

If you are talking about bolting the bar on I absolutely agree. Bolt it in a slot maybe 3/32 deep.

@PaulCade

2 жыл бұрын

Exactly what I was thinking

@karlchristoffer1275

2 жыл бұрын

@@PaulCade Me too! 👍

@idontwantachannel3091

2 жыл бұрын

(after watching the video) ... putting the 1/2" square bar in a shallow slot and retaining the bar with csk screws - instead of welding.

@arloames4517

2 жыл бұрын

Or try keyhole welding. Drill holes in either part and weld them together through the holes.

Nice video, I had not seen this style holder before. Retired welder here trying to learn machining. On the welding, you could have beveled the corners you welded then when removing the excess weld you would have retained more strength. Thanks for the videos, very helpful and informative.

@WinkysWorkshop

Жыл бұрын

Yes a v groove would have been better. The next video has a better design.

Good work and a very interesting tool design. I notice your accent, sounds like home to me. Maryland or Pennsylvania, maybe Virginia. I bought another lathe a few weeks ago and have been accumulating some of the odds and ends I "need" for my small hobby type jobs. Already I miss my old, much bigger and more powerful lathe. Such is life. Thanks for the video, you made everything very clear so that anyone could replicate that tool holder.

@WinkysWorkshop

Жыл бұрын

Thanks Ed, the next video highlights a better version.

Pretty awesome! I may have to build one for myself, you could use 2 button head screws on top and bottom of the cutoff blade to hold it in place to increase the clearance

@WinkysWorkshop

2 жыл бұрын

That's a good idea. The only concern if that the top of the blade is concave and has a cutting ends on the side. the screw might damage the blade edge.

@johnnym1320

2 жыл бұрын

@@WinkysWorkshop make a thin aluminum washer to go under the head of the screw

@WinkysWorkshop

2 жыл бұрын

@@johnnym1320 The problem is, the blade is slightly recessed and the top is larger. The blade is T shaped. The top 3/16 can not be clamps because the recess behind it is slightly deeper than the blade.

Winky, the original clamping bolt head underside was tapered. As you tightened the nut it pulled the bolt head inwards clamping the blade tight back against the holder, it also forced the blade down tight against the base of the holder. Regards from Australia.

@WinkysWorkshop

2 жыл бұрын

Thanks - Yeah I knew that. The reason I didn't do that is I didn't want to bolt to damage the top of the blade. The blade I used is concave with fragile edges. It's by far the best blade I have ever used. If the blade fits the slot well (which it does) all the force will be downward, it will never move.

very clever idea. I was (am) going to make a rear toolpost but this design has me confused. Have to find the Tom Lipton video and watch this also. Cant weld so will have to think of some other method of mounting it

@WinkysWorkshop

2 ай бұрын

On a standard setup the point of flexing is normally the compound so the blade digs into the cut when it flexes. With this design the point of flex is where the hole is drilled about the blade. When it flexes the blade pulls away from the cut. Tom's video is good.

Mill the blade holding slot at a slight angle to give the blade a little top rake for better yet performance. Keep up the good work, JIM

@WinkysWorkshop

2 жыл бұрын

You might be right! I don't thick it needs much put this might be a plus - Thanks

Very nice, that's going to get copied! I've been thinking about making a parting tool holder for a while! The original clamping set up pulled through from the other side, that would give more chuck clearance. Cheers, Matthew

@mrayco

2 жыл бұрын

kzread.info6OG63fH5uPw?feature=share watch this one

@WinkysWorkshop

2 жыл бұрын

Ha... I made a copy and it didn't work as well. Still trying to figure out why!

@mrayco

2 жыл бұрын

@@WinkysWorkshop i made mine from an old leaf spring it works well with me.

@WinkysWorkshop

2 жыл бұрын

@@mrayco That's Great!

That was super interesting. I wonder if the design could work on a soggy mini lathe? 🤔, always a problem with those machines made from Chinese rubber 😉. A project for spring me thinks. Thanks for another great idea.

@WinkysWorkshop

2 жыл бұрын

This guy here is using one on his soggy lathe kzread.info/dash/bejne/hIucq8NmY8qzlso.html

Ben battling the cut off chatter right along with you and this is interesting idea...instead of trying to ridged everything letting the tool take up the vibration to counter it is quite genius. I'm going to try and make something for the hobby lathe along these lines.. cheers!~!

@WinkysWorkshop

2 жыл бұрын

The pivot point it the secrete. It flexes above the blade so the tool pulls away from the cut. Thanks and good luck.

That’s really neat, thanks for showing it to us!

@WinkysWorkshop

2 жыл бұрын

Thanks, and for watching!

That style of cut off tool is very common here (in Finland) on older manual lathes. Most I have used have been like that. Not sure what brand or where they were made but most of the old lathes I have used were made in the eastern Europe (Soviet Union, Poland, Czechoslovakia etc, so I suppose the tooling was of the same origin.

@WinkysWorkshop

2 жыл бұрын

Yeah... I've seen several versions. It's an interesting concept and it works

I designed an upside down cut off holder. Works great. All problems went away. Never go back to original way!

@WinkysWorkshop

2 жыл бұрын

If you have a lathe that runs in reverse that works well for the same reason this tool works. Many older lathes have screw on chucks however. Parting from behind and upside down works well too but many cross slides don't extend for enough back.

cool project. Tom Lipton showed an Armstrong cutoff being used and pushing it till it flexes. Did what it was designed to do.

@WinkysWorkshop

2 жыл бұрын

Thanks! I could feel this flex a little but could not see it. I don't think my 1/2 HP lathe could flex it that much but obviously it's doing what it is supposed to do. I think I saw that video.... maybe 3 to 5 years ago.

@deemstyle

2 жыл бұрын

I wasn't able to find any OxTool video showing a cut off, but I did find this one which is very relevant: kzread.info/dash/bejne/fXmIuLRyodernbw.html

@deemstyle

2 жыл бұрын

And Mr. Pete show an Armstrong gooseneck holder which is the same concept: kzread.info/dash/bejne/a61kr8-vo8aoqso.html

@WinkysWorkshop

2 жыл бұрын

@@deemstyle Thanks for the link. I remember seeing those Gooseneck holders before but never thought about why they were made like that. You are right, it has the same effect. I sometimes get chatter cutting threads and acme threads are almost imposible! I see another tool holder in my future! Thanks!

@WinkysWorkshop

2 жыл бұрын

@@deemstyle - I remember seeing that video a few years ago. I wanted to see it used! Oh well... still a great video. I think I may make one for threading. Acme threads are a pain. I'll bet this tool would work great!

Hi Mr Winky, I have one of those Armstrong cut off holders but never been able to get blades for it so never used it, I used to have problems with parting off but somebody told me it’s all about making sure your tool is dead centre and constant pressure, now I part of stainless steel with ease. Some help with you welding techniques move the torch left to right and watch your puddle. Good job going to make one and try it out 🤗👴🏻

@WinkysWorkshop

2 жыл бұрын

Cut off problems have a major amount of culprits. Spindle diameter, chuck overhang, how the compound is made etc. I always use autofeed with cut off. In the past I have had situations were faster feed is better than slow. Also slower lathe speed... or faster. Larger more ridged lates are way more forgiving. With small lathes you are working with multiple resonances. Probably the biggest problem with most small older lathes is the depth of the chuck. The spindle size is not adequate to handle work 4.5 inches from the bearing. I suspect this cut off tool holder will resolve most these issues. The old chucks that came with these lathes worked way better... very shallow. As for welding... I used to travel the other way but the best welder I ever saw pushed the tip. I can't say my welding improved by doing this but it doesn't seem to matter for me. I used to be good at stick welding and yes watching the pool helped. Mig is happening too fast.... just don't see it. My biggest problem is being dead on center.

@shakdidagalimal

2 жыл бұрын

@@WinkysWorkshop I have a 500w shop light I put near my welding and shine into the area - it's just below tripping the autohelmet - that way I can see everything with the helmet down and me in position before pulling the trigger. If I lose my spot - just let go of the trigger - can see again in the quick pause-

@WinkysWorkshop

2 жыл бұрын

@@shakdidagalimal I've done the same although it was a clamp light and temporary. Not 500 watt either. That would help for sure!

Hell Yeah!!!

@WinkysWorkshop

2 жыл бұрын

Amazing huh? it worked fantastic

Thanks Mark. Was that just mild steel stock that you used? Seems completely counter-intuitive to make a holder designed to flex like that. Undeniable results though.

@WinkysWorkshop

2 жыл бұрын

Yes it does. However, if you think about it, there will always be flex. If you are lucky enough to have a lathe that is extremely rigid the amount of flex isn't an issue. The trick to this tool is where the flex takes place which is over the top of the tool. As I'm sure you saw in the video this holder tends to pull the tool away from the work. The question is, where is the ideal place for the flex and how flexible is needed. I made a second blade holder just like the first and it did not work. Despite all my efforts I can not figure out why. So I made a new design with the pivot point closer to the point of cutting. This makes the tool retract more when it flexes. I made two... one was a test and the second was for making the video and they BOTH worked! I'll post it Friday. It's also much easier to make.

Very Cool, i remember when i bought my first Lathe, a old 10'' Hercus, parting off was a drama, there was a old German Machinist at the Saw Mill i worked at, i asked him for any tips, he said 3 words, ''power mass rigidity'' i said huh what, and said 3 more words, ''buy big Lathe'' and then laughed a lot...very loudly.

@WinkysWorkshop

2 жыл бұрын

True words... although this tool seems to work well on wimpy lathes! Ha

@65cj55

2 жыл бұрын

@@WinkysWorkshop Yep, that's it Winky, i have been Parting off in Reverse i my little Lathe, but i'm going to make one you for sure.

@WinkysWorkshop

2 жыл бұрын

@@65cj55 - Reverse is good if you don't have a screw on chuck I'll have drawings posted on Friday with a short follow up video

I've seen people use countersunk screws to hold the 1/2" square piece to give a clean join.

@WinkysWorkshop

2 жыл бұрын

I think that would be a better approach. I could also slot the back maybe 3/32" and it would never move.

@neillawson4493

2 жыл бұрын

@@WinkysWorkshop most of the youtube examples I've seen have been from a Russian or at least Slavic channel so I can't really tell you much more. It is an amazing mount and now that I've seen your video I'm going to give it a go.

@WinkysWorkshop

2 жыл бұрын

@@neillawson4493 I'll have the plans drawn up by Friday. Updated without welding.

Grinder and paint make me the welder I ain't.

@WinkysWorkshop

Жыл бұрын

Me too!~

Probably a solution for basic stability issues but nevertheless a very interesting concept, surprised it works so well. Did you see the latest video by Rob Renzetti about boring the jaws? I agree with Rob that jaw bellmouthing may well be the most overlooked issue ever. Using a collet chuck whenever possible is obviously the best solution.

@WinkysWorkshop

Жыл бұрын

I didn't see that but I'll check it out. Thanks

I'm really liking your videos. Very good information. I'm wondering what mill you are using, and what collet system is holding your endmill? It looks very quick to change out your tooling. Are they just R8 collets?

@WinkysWorkshop

Жыл бұрын

The mill is an Enco RF30. The collets are R8. Thanks for the comment. Be sure and watch the next cutoff video. I made a slightly better design.

Indeed your parting blade is "T" shaped. Recently, however, I learned that there is actually a designation for this. The parting blade can be a T type or a P type. I believe these are abbreviations for "tapered" or "parallel" sides. So while your blade is T shaped, it is very likely a "P" type blade since the sides are parallel to each other. :)

@WinkysWorkshop

2 жыл бұрын

Its a PN3. The sides of the lower part is parallel but the wider upper part has tapered sides. It might have a very short area with parallel side toward the cutting edge but very short. I have better luck with this blade.