Several questions (glues, drill mills, molybdenum)

[justgary]

Originally Posted by justgary By the way (and it really is none of my business; I'm just curious), why Moly?

Originally Posted by BFGarrett very low thermal expansion coefficient

Oops, That may well answer the question. I should have thunk about it for another few seconds.

- Just Gary

[Don Clement]

Originally Posted by RTP_Burnsville Don, I find that Peltier element to be pretty interesting. Have you constructed such a chuck? If so did it work as expected? Robert

Robert,

I have not personally constructed a thermoelectric chuck. However I did see such a chuck demonstrated at Westec many years ago (IIR a Swiss company) and it worked as I described. The demonstration was fixturing a chunk of honeycomb composite to be machined on a Bridgeport that only could be fixtured by glue or some other similar process. The thermoelectric chuck worked great for delicate hard to hold parts.

Don

[RTP_Burnsville]

Thanks Don... I searched a little and found a company AMCC which appears to make a couple what they term ice plates. When I have a few minutes I am going to give some serious thought to making a small version of such. Just this morning I had ruined two more small parts as the glue came loose on the final operation.

Thanks again,
Robert

[davebaldwin]

Can anyone recommend any Shellac product to try?

Thanks,

Dave.

[justgary]

Dave -

I use Bull's Eye, but mainly because a local store carries it. They sell it in very small cans in case you don't need much.

You can also buy stick shellac, which is used similar to hot glue in watches and musical instruments.

Any brand should work, since it's pretty much all the same thing; literally, the shell of the Lac beatle.

Regards,

- Just Gary