How make a disk?

[P. Waller]

Place bar in lathe, face, turn and chamfer the end.
Either part or saw to near length.
Pocket soft jaws and face and chamfer the back side, you may make hundreds of parts per day this way in aluminum depending on the alloy of course. I personally find it difficult to part such a piece to 0 and achieve a good finish, when the part comes off it will always leave a center nub which will require back work anyway.

316 SS discs, pre-sawed, 3"+ OD that finished at .375 +.000 -.005 thick, 50 parts ordered so I made 55 just in case, the remainder of the work was milling pockets and holes in each part (-:
It took about 6 hours for the lathe work.

 

[petertha]

Here are some pics of my 0.138" thick drive washer using the CA glue mandrel technique. Another pic showing the cheapo MDF spacer disc method, happens to be backing for RT drilling operation but same technique for lathe turning.

I've just got to make me some of those soft jaws!

 

[Crank]

never mind, I didn't read the answers posted and I was repeating an idea.

 

[P. Waller]

Here are some pics of my 0.138" thick drive washer using the CA glue mandrel technique. Another pic showing the cheapo MDF spacer disc method, happens to be backing for RT drilling operation but same technique for lathe turning.

I've just got to make me some of those soft jaws!

Buy them, far less expensive then making them yourself, we sometimes run several dozen at a time when one of the mills is busy doing nothing for a few days. As with most other simple products you can not make them nearly as economically as a shop that does nothing else, we use H&R, Dillion and Monster Jaws mostly. Monster makes some very inexpensive pie jaws in aluminum that are excellent for thin parts of largish diameters, aluminum jaws do a bang up job of not marking finished surfaces as well.

http://monsterjaws.com/