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Unread 03-06-2016, 12:29
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,509
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Re: HEX broach too big for our manual press

Ours fits just barely on our Grizzly arbor press. They don't sell the exact model we have anymore but judging by the ones they do have, it's probably a 5-ton. 2-ton is pretty small for broaching 1/2" hex. I'm a big guy, and we've broached certain things 1/2" hex (steel) to where I had a 4 foot pipe over the handle and was just about hanging off of that to get it to go. On a two ton press, you'll struggle with anything more than 6061 aluminum, about 1/2" length through bore.

If you do want to keep your press and use it with longer broaches and things, there's two things you can do. You can chuck up the arbor in a 4-jaw chuck on a lathe and drill a hole into it, or you can build a custom table for your press, that has a sturdy place for you to set the part below the press.
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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