Acme thread terminologies
Acme thread terminologies
(OP)
Working in the aerospace manufacturing fields, I occasionally encounter a drawing that calls out "break feather edge of thread to appx. one half width of thread" on Acme threads. The meaning seems clear to me but I have noticed that it never sems to get done in the places I have worked, with various excuses and/or "reasons" for this. Can anyone explain this term's meaning, exactly? I assume it means to chamfer the entire length of the thread edge, both sides, to on quarter of the thread width. In this case, it is an internal thread as well....how would this edge break be accomplished?





RE: Acme thread terminologies
Mike Halloran
Pembroke Pines, FL, USA
RE: Acme thread terminologies
RE: Acme thread terminologies
Sheep
RE: Acme thread terminologies
Mike Halloran
Pembroke Pines, FL, USA
RE: Acme thread terminologies
I use ACME threads on the parts we design and the desciptions above are accurate. However, our defination was:
Higbee start of thread - remove the "feather" until a full width (or pitch) had been achieved.
roadapple
RE: Acme thread terminologies
It was to remove sharp edges and provide a good start point as Mike/Btrue say.
RE: Acme thread terminologies
RE: Acme thread terminologies
I've never had a problem.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada