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Extending a hardened masonry bit

Posted: Wed Oct 16, 2013 12:28 pm
by The Extractor
Hi all, new here, a customer is having us extend a masonry bit. It is a 3/4 shank for an SDS hammer drill. I drilled a piece of solid 1" 1018 and shrunk fit it and welded it with UTP rod with a little preheat and put it sand to cool.

What is the " proper way " to do this?

Thanks - A

Re: Extending a hardened masonry bit

Posted: Thu Oct 17, 2013 11:31 am
by Mike
Welcome to the forum.
I use extensions for drill bits.

Re: Extending a hardened masonry bit

Posted: Thu Oct 17, 2013 8:41 pm
by jwmacawful
for extending drill bits i use a length of round stock approxamatly the same diameter as the drill shank then use a cut off wheel to slice the shank between the drill flutes and the adaptor contours that go into the hammer-drill then lay all in the "v" of a angle iron held in a vice then clamp with a c clamp vise grip and tack with 7018. remove and check for trueness then weld and wrap in old welding gloves when finished so it cools slowly.