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How to clamp these up

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MadNick:
Hi there,

Im looking for some expert advice please on how to clamp the following awkward items up on the mill for drilling.

I need to invert these and drill two 5/16" holes just over an inch deep, square-on to the flat base and just inside their overall diameter by 1mm or so.



Obviously these could be tricky to clamp up as any drilling force extered on the base will make them want to roll away.

I have at my disposal a vertical mill/drill, angle clamp, comprehensive clamping kit.

Your suggestions are most welcome :)

Nick

krv3000:
HI have i got this right you need to put sum holes in the bottom thees ie on the flat if so have you got a chuck of the lathe that you can clamp on your drill stand and hold them that way

MadNick:
krv,

Yes, you are spot-on, sounds like a simple solution to a, er, simple problem

:)

Nick

Fergus OMore:
If you follow Rob's set up for his clamp- that's it.

Really, all you 'need' to do is make a  jig out of two bits of wood-- and drill a hole- with a spade drill between the two and hold it in the vice on the mill drill or whatever.

You could- if you have a pair- use those serrated clips that people use on telly masts.

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You could wrap the things in rope --the stuff left over from making piston rings.

Now where did I read that? :Doh:

MadNick:
Thanks Norma Jean,

Who is Rob and where can I find info on his clamp setup?

N

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