08-14-2013, 04:49 PM
(08-14-2013, 03:31 PM)DaveH Wrote: Yes if you are superman
Because the tool bit is going around (with the work piece) and wobbling it takes tiny cuts at a time. The cutting edge is moving around so that hex tool bit is not cutting on all 6 edges at once but just a small part of it.
Clear as mud
DaveH
The rotary broaching tools use but a fraction of the force needed for traditional stationary push or pull broaching. In my days working in screw machine shops as a setup guy, programmer and operator (later process engineer and supervisor), I used the Genevieve Swiss broaching tools to make Torx and hex sockets in the heads of Ti6Al-4V titanium alloy bone screws. With those, I had to go back into the hole with a solid carbide drill, boring bar or (in some cases) end mill to clean out the big chip left at the bottom of the hole.
Those sockets couldn't be done in a cold header machine as a socket head cap screw or set (grub) screw is done. That method leaves no burrs at the bottom.