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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Tapping a hole in aluminum?
Lots of questions about tapping this.
2017 aluminum collar/rod 64 mm length (about 1" will be used) 22 mm outer diameter 8 mm inner diameter The rod will be pushed into the hub of the skate wheel and the assembly will screw onto the arbor of the cordless drill. That looks like a more simple and efficient way to mount the wheel. http://www.flickr.com/photos/27532210@N04/ http://www.flickr.com/photos/27532210 N04/ (sign removed) I need to thread the 2017 aluminum collar described above. For what it's worth, I have this little tap and die set. http://www.lowes.com/pd_232550-1083-...ductId=1065037 Is the collar's 8mm inner diameter appropriate for 3/8 inch 24 thread? Otherwise, what size drill bit? Can the inner diameter be accurately enlarged simply by drilling into the 8mm collar hole? There was a recent thread about that, I think, but the discussion was not perfectly clear to me. Searched Amazon for "3/8 24 thread tap". (Other online merchant reference links are invited.) Union Butterfield okay? The thread length will be 1", or greater if doing the whole 64 mm collar at one time (I guess not). The tap finish, like black oxide, makes no difference for tapping into 2017 aluminum? A tapered tap is unnecessary since it is a long hole? The main concern is that the collar/wheel assembly is secure and centered on the drill arbor, so that the wheel spins without bouncing. A very close collar & arbor fit would be nice. Is "H4" better than "H2" for this? Thanks. -- If any question is unclear, please either ask for an explanation or don't bother answering. |
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