D1-6 Spindle With Smaller Chucks

[uncle pete]

Title basicly say's it all, My nefew own's a fairly large (for a HSM ) TOS lathe with this spindle mount. This lathe has a top speed of 2000 rpm, His 3 jaw chuck is 10 inches in diameter, so for smaller parts, say under an inch he's going to want to wind the rpm's up. The 10 inch dia. 3 jaw he owns is not all that accurate so a fairly high quality 3 jaw/ 4 jaw independant chucks and 8-10 inch diameter faceplate buying spree is going to be likley.

So for those that own a larger lathe how did you solve this problem? A D1-6 backplate to an adapter to fit plain back chucks, and faceplates will work but maybe someone knows of a cheaper way, Im going to be unable to access this board for the next 17 day's so will have to thank everyone in advance for any information provided.

Pete

[lane]

For small things I use collets. One of those Bison collet chucks work well.

[kvom]

The lathe I use at school has a D1-6 spindle. It has some good quality 8" 3-jaw chucks and a Sjogren collet chuck, as well as Jacobs rubberflex collet chucks.

[BadDog]

I've got a D1-6 now. I put a Rubberflex on it for stuff under 1-3/8 that needs high rpm (my max is 2000). I just got a Bison 8" 3 jaw that's rated for over 4000 rpms.

[.RC.]

You can always just mount something like a 6" 3 jaw in a 4 jaw chuck...Then you can adjust it to get 0 runout..

[BadDog]

To me, the main benefit of the smaller chuck is easy mount/swap and higher RPM. Both are lost by mounting it in a larger 4 jaw. That, combined with the ability to grasp smaller pieces and (vastly) improved run out is what led me to the last few months of searching out a new chuck for my big lathe. The 8" is quite small for this lathe size, which often has a 10 or 12" 3 jaw, but for over 90% of my work it will be wonderful. For the rest, I still have my Rubberflex, the 10" slightly sprung Chinese chuck, a 12" Buck 4 jaw, and enormous 16"(?) Rohm 4 jaw. I expect that almost everything I will do will work without resorting the Chinese chuck or the monster hiding in the corner...

[Teenage_Machinist]

From Bedair's site. Looks plenty weird. But should work fine.

[x39]

From Bedair's site. Looks plenty weird. But should work fine.

I have the same set-up on my Enco 14". D1-6 spindle with a six inch Yuasa adjustable three jaw chuck.

[uncle pete]

Thanks

Just got home and would like to thank everyone for their responses, Sorry for the delay but work really interfears with life. Thanks again,

Pete