making square holes

This topic has 1 reply, 1 voice, and was last updated 8 April 2010 at 21:31 by Speedy Builder5.

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8 April 2010 at 21:31 #50531
Speedy Builder5
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@speedybuilder5
Perhaps you all know this, but I needed to make a square hole in some loco crossheads. First I drilled the holes to same diameter as the square hole. Then silver soldered a piece of square HSS (smaller section than the drilled hole)into a piece of round stock.

Mounted this ‘new tool’ into the mill drill, and used it as a broach, gently shaving off a little each stroke.
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8 April 2010 at 21:31 #16545
Speedy Builder5
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making square holes

making square holes

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