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MAKING A SQUARE BROACH

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mattinker:

--- Quote from: ieezitin on February 06, 2017, 07:43:03 PM ---Phil..

Nice work..

Your thread has given me room for thought about making a rotary broach seams quite simple.

my depth will be around 9/16 on this project and its in an 3/8ths round stock at an angle of 30 deg but there is room to put a champher on in fact its a mini boring bar i am designing ..

Anthony.

--- End quote ---

I may be a bit of a killjoy, if it's only a 9/16" deep in 3/8" stock, a 3/163 square is easy to file! Much less work than making either a rotary or a standard broach!

All the best, Matthew

ieezitin:
Mathew

I actually own a diefiler and i with this machine filed into shape the square hole to size from the pilot hole took me 20 minuets to get it into shape. I want a straight action a broach gives, If I make 20 boring bars the investment of making a rotary broach will be a pay-off , also the tool will service me on other projects for square hole broaching...

Anthony

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