Converting a screw-on lathe chuck mounting to a bayonet mounting.

Improving a lathe chuck mounting. I hate screw-on chuck mountings, this video shows how I converted a screw-on lathe spindle to a bayonet system.
Changing chucks is now much faster and easier and there is no risk of unscrewing when running backwards.
Some years ago I had a very old and worn lathe which had a "bayonet" chuck fitting. This was the best part of the lathe. When I scrapped it I kept a chuck backplate and a face plate. My existing chuck back plates only needed a bit of boring out and drilling and tapping for four studs. I already had a suitable back plate for one chuck so I only had three to do. It was very easy and I am over the moon with the result. I find myself changing chucks more often, instead of using a 3 jaw with a shim I now simply switch to a 4 jaw when more appropriate.
#lathe #chuck #chuckmounting #bayonet #screwon #lathechuck #lathespindle

[@charleskutrufis9612]

I guess I will have to stay with the old screw on. I could live another 73 years and not duplicate that impressive result. Thank You for posting, I see something new and learn something I would have never thought of every time I watch you.

[@MotoChassisByTonyFoale]

Never, ever, think that you can't do something. Just do it. Even complex projects can be broken down to simple steps.

[@StefanGotteswinter]

Wow, thats a significant modification, very well executed.

[@ypaulbrown]

I learn something new every day.....I had never seen a bayonet mount.....thank you for a wonderful video, cheers from the USA, Paul

[@angrygnome4779]

I have the Enco version of your lathe. It has the threaded spindle as well. I’ve often wondered if there was a way to convert it to something else. I’m glad I stumbled upon your video. Very well done.

[@Ryan-dz3jo]

Love your work Tony, thank you very much.

[@MotoChassisByTonyFoale]

Ryan, You might like the latest here. kzbin.info/aero/PLyn2snGjYlHw_e4LomNphh8KleeqPiqpz

[@tonysfun]

Nice job! Thanks for sharing wit all of us.

[@MotoChassisByTonyFoale]

Tony, You might like the latest here. kzbin.info/aero/PLyn2snGjYlHw_e4LomNphh8KleeqPiqpz

[@TheKnacklersWorkshop]

Hello Tony, A good idea that you executed well... Take care. Paul,,

[@65cj55]

Nice Job, well worth it.

[@MotoChassisByTonyFoale]

You can't believe how much better it has been since I did it. Well worth it.

[@markshort9098]

Nice upgrade.. both my lathes have threaded spindles which on the little 9" hercus isn't a massive issue except not being able to run in reverse and trying to keep everything clean but on my big lathe, trying to screw on an 18" chuck or a 3' face plate is ridiclous.. changing chucks on the big lathe is such an issue that I don't even have a backing plate for my 15" 3 jaw and I just hold it in the 4 jaw which is far from ideal

[@MotoChassisByTonyFoale]

That is a big chuck and face plate. I did not know that such large lathes used screwed spindles.

[@RotarySMP]

Well done. I considered doing the same with my Boley 4LV, but to D1-3 camlock, and couldn't make it work. Going to DIN55027 bayonet would solve the interference issues I had. Nice one.

[@MotoChassisByTonyFoale]

Good luck with it.

[@paulgreenlee190]

Great video Sir, I have a 1960 South Bend 13"x40" with a 2-1/4"x8tpi threaded nose. I have been researching on converting to a D1-4 with some type of adapter. I really like your setup but either way I don't have a mill and I don't know how I would be able to complete it without a mill. I'm only a hobbyist anyway. I probably don't have the tooling for doing this anyway. Thanks for sharing, one day when I have more to work with, I'll give it a shot, great idea

[@gunfrk]

We may have to gang up on 2 of these.

[@paulgreenlee190]

​@@gunfrk We can do that, Your mill is the key ingredient

[@MotoChassisByTonyFoale]

A drill drill press and some hand tools are enough to do this, never let the lack of the best tool stop you. There are always more ways to get a job done.

[@paulgreenlee190]

@@MotoChassisByTonyFoale Yes sir and being able to see the parts needed made a huge difference. Thanks again for sharing

[@wallacew8634]

I Tony. What a coincidence. I'm doing the same to my Colchester Triumph 7 1/2 inch. I'm making a full D1-6 adapter place so I can hold the chucks I have with my CNC machine I'm going to rough turn the adapter plate and then get it case hardened. Once that is done, bolt it to my trimmed spindle and then do a final grind on the lathe itself to make sure its true. I've just found all the Camlock studs and cams in China and are on there way now. I could not find any bits like this here in New Zealand. Cheers Wallace. Maybe I'll post a video !!

[@MotoChassisByTonyFoale]

That sounds excellent. Can you email me a link to the Chinese source [e-mail]

[@ab-shop]

Hello Tony and thank you for this video: It Is one week that i work on your same idea, but i dont want to disassembly My spindle from the My Chinese lathe, so My question Is : Is It possible to make the flange in 2 peaces? So i can install without disassembly the harbor? Thank you in Advance for your answer,Alberto from Italy!

[@MotoChassisByTonyFoale]

Alberto, I think that you can do it one piece without removing the spindle. If you make the bayonet plate and put that on first. Machine the block to suit the existing thread, then fit it on with loctite and some screws if you feel it necessary. Then you can machine the outside.

[@ekobowo139]

Ide yang bagus i like .indonesi fans

[@zxspectum]

Awesome bit of machining on the tapers. Question about the metal you used was it a particular grade to give a bit of toughness?

[@MotoChassisByTonyFoale]

It was decided more by what the supplier had in stock. It was quite tough but I'd have to dig out invoices to see for sure. It was something like the european equivalent of 4140.