Broach Internal Square Drive?
Broach Internal Square Drive?
(OP)
Newbie here. Anyone have any experience broaching an internal square drive (1/2") in the end of a 17-4 PH stainless steel threaded shaft? The 2" shaft currently has a 1.5" hex drive on the end of it, but due to interference with another part needs to be cut off and an internal drive put in it. It's also hardened to Rc 38-45, so that may complicate matters. Any advice? Can it be done?
Jim
Jim





RE: Broach Internal Square Drive?
Mike Halloran
Pembroke Pines, FL, USA
RE: Broach Internal Square Drive?
http://www.slatertools.com/rotary_broaching.htm
RE: Broach Internal Square Drive?
Jim
RE: Broach Internal Square Drive?
RE: Broach Internal Square Drive?
Have you looked at an external 12 point configuration? That might be easier.
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Corrosion, every where, all the time.
Manage it or it will manage you.
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RE: Broach Internal Square Drive?
RE: Broach Internal Square Drive?
http://www.wheelertool.com/
RE: Broach Internal Square Drive?
Cost detractors to broaching: machine costs and specialty broaches. That hardness is going to be hell on the cutting edges long term (e.g. production quantities).
Cost detractors to EDM: machine costs and the cost of graphite for electrodes (if using a sinker). Wire costs aren't bad if you can cut straight thru (wire EDM). It all depends on what the part looks like.
You'll also want to look at how difficult the fixturing of the piece may be. Is the shaft long, part of a sub-assembly, etc.? That will affect your tank size, and thus potentially the shop that can burn the piece for you.
RE: Broach Internal Square Drive?
RE: Broach Internal Square Drive?
RE: Broach Internal Square Drive?
RE: Broach Internal Square Drive?