Idea for holding coin on mini lathe

[schor]

Spy coin.

 

[eltonc]

I don't have a clue. Honestly. What modifications would you want to make to a coin?

I'm trying to help..... if you don't want help...don't post.

Not everyone is thinking the same way you are.

I see, i want to hollow out the coin as above photo . Thanks.

Sent from my Galaxy Nexus using Tapatalk

 

[sliverr2]

Hi everyone ,

Is there are better method to hold a coin without using collet? Since my sieg c0 lathe cant not use it.

I have tried to hold by chuck but cutting tool will crash to it.

Thank.

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I have made 2 sided half dollars and to hold them i chucked up a piece of aluminum and bored a recess slightly smaller than the od of the coin and tapped (with a hammer) the coin into the recess . It worked very well be sure to put a thru hole in the aluminum so you can tap the coin out when done

 

[Dan_S]

take a chunk of bar stock and do the following to it.

1. turn it to a diameter no more than 1/8" (3/32" or 1/16" might be better depending on material) larger than the coin you want to work on.
2. face the end
3. bore a recess in the end just large enough to hold the coin
4. through drill the bar, make the hole slightly smaller than the recess. You need a surface to register the coin on
5. slit the bar length wise with a band saw or hack saw

you now have a custom collet, that you can chuck in a standard 3 or 4 jaw.