View Full Version : Shop made Collet Chuck

07-20-2004, 05:52 PM
This is my shop made collet chuck for my 9inch southbend. It uses a drawbolt and has keyseats and a pin for alignment as bored and also to hold the collet while tightening. Angles are 15º.


I got tired of not having a way to chuck up small internal bores, so I made several expanding mandrels for the collet chuck.


The whole set laid out, instead of making many collets, I made some expanding-contracting bushings.


a close up of one of the internal expanding mandrels.


irnsrgn, I am just a blacksmith so the machining is not perfect.

Paul Alciatore
07-20-2004, 05:56 PM
Looks super to me. What's the largest collet size it'll go?

Perhaps you should write it up for the magazines.

Paul A.

07-20-2004, 06:21 PM
1-1/4 is the biggest so far, made 2 extra that can be bored, while I was making them.

Mike Burdick
07-20-2004, 06:50 PM

Very clever! Like Paul suggested - do a write up for the magazine! I'd sure be interested.

Dave Opincarne
07-20-2004, 06:58 PM
Very Nice! Have you experienced any problem with the expanding mandrels only expanding at one end? What's the size range for these to work effectivly?


Allan Waterfall
07-20-2004, 07:26 PM

They look well enough finished to me, tools are for using not polishing. Unless you are one of the people that only make tools for exhibition.

I'd be well happy with a set like that,plus the satisfaction of having a personal unique tool.(no comments please about personal tools. http://bbs.homeshopmachinist.net//biggrin.gif)

Good luck in your endevours.


07-20-2004, 08:41 PM
Dave, they are for standard fractional sizes. they only expand on one end, seems to work well tho.


07-20-2004, 08:46 PM
Nice,are you planning any clutch collets for the bigger OD parts?

07-20-2004, 09:34 PM
Weird, I have no idea what you are calling a clutch collet, I am self taught and don't know all the proper terminology for things, so you will have to explain please.


G.A. Ewen
07-20-2004, 10:29 PM
http://bbs.homeshopmachinist.net//cool.gif irnsrgn you have done a really fine job on your chuck, collets and expanding arbors. You really should right up an artical as others have suggested. Many fellows with small lathes would love to have that kind of tooling. Well done http://bbs.homeshopmachinist.net//cool.gif

07-20-2004, 11:02 PM
Yes, please write this up for HSM/MW(I get them both, can't get enough of these two magazines. I'm addicted to metal).
Those are the neatest thing I've seen in a long time. I like making my own special tools. I once made a pair of special screwdrivers just to adjust the secondary idle stop screw on my Holley 4160 4Bbl while it is bolted to the intake and the engine is running. Regular angle screwdrivers wouldn't fit in the available space, and didn't have enough swing. So I made a pair, one with the slot perpendicular to the handle, and one parallel to it. It's so convenient to be able to make that adjustment shile the engine runs, as opposed to taking the carb off, adjusting it, reinstalling it, running and checking it, and doing it all over again. Just adjust it, and watch the dwell/tach.
But your collet chuck and expanding mandrel set is MUCH cooler than my custom screwdrivers. I have GOT to have a set of these.
I need a set of collets and expanding mandrels like this,because I mainly use my lathe for making bearings/bushings and pins/punches. I REALLY need a set of each. I can't afford to buy them and would like to make them, if I knew how. Please, Please, PLEASE write this up for the mag. It would be a great article. Did I mention that I need to make a set of these?

07-20-2004, 11:48 PM
Ok, but how do I go about getting the article to the magazines, I am not a subscriber, and have never seen one. Help

07-20-2004, 11:57 PM
E-mail Neil and ask him to send you the authors guide.

G.A. Ewen
07-21-2004, 12:04 AM
You can contact Neil at nknopf@villagepress.com . He will send you an information package on how to put your artical together. I think that he will also send you a sample magazine so that you can see how they are laid out. (I bet you will subscribe as soon as you see one http://bbs.homeshopmachinist.net//wink.gif )

07-21-2004, 08:49 AM

I've sent you a copy of the author's guide. If anyone else is interested, drop me a line at cfoster@villagepress.com.