Automotive Gearbox tolerances
Automotive Gearbox tolerances
(OP)
I'm looking for standards that provide guidance on housing accuracy, particularly parallel shafted gearing and interchangeable housing halves with dowel pins.
In the industrial realm, we have only ISO 10064-3 and its DIN equivalent, which specify tight tolerances assuming the housing halves are machined together.
Does SAE or another automotive reference have a standard that applies?
Thanks,
David
In the industrial realm, we have only ISO 10064-3 and its DIN equivalent, which specify tight tolerances assuming the housing halves are machined together.
Does SAE or another automotive reference have a standard that applies?
Thanks,
David





RE: Automotive Gearbox tolerances
If a bearing bore is partially in both housings that sounds like a really tough assignment to me.
RE: Automotive Gearbox tolerances
Mike Halloran
Pembroke Pines, FL, USA
RE: Automotive Gearbox tolerances
David
RE: Automotive Gearbox tolerances
Even 'just' locating two pair of dowel holes relative to each other well enough so simple plates can be interchangeable is jig borer territory.
I should note that some Japanese CNC mills are routinely capable of jig borer accuracy, but mass produced gearbox housings are not normal workpieces for them.
Mike Halloran
Pembroke Pines, FL, USA
RE: Automotive Gearbox tolerances
David
RE: Automotive Gearbox tolerances
I'd sure like to know how they do that.
Mike Halloran
Pembroke Pines, FL, USA
RE: Automotive Gearbox tolerances
If so, I know of no industry standards, but position tolerance within 50 micrometers has been used in the automotive industry.
RE: Automotive Gearbox tolerances
I appreciate the anecdote of .05mm positional, this is roughly what was expected.
It occurred to me after the last post that Japanese automotive standards might cover it instead of SAE, but it's just as possible that it's proprietary tolerances only.
David
RE: Automotive Gearbox tolerances