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Posted by mark@ems-fife.co.uk on May 2, 2008, 7:32 am
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> Not a model though fairly small. A 2hp 1000rpm engine-driven direct-coupled
> genset. The flywheel and dynamo drive flange each have pins (3/4" and 1 1/4"
> respectively) bolted to them which engage in holes in the other and there is
> 1/4" leather sandwiched between the flanges.
> Its obviously been run both out of alignment and long after it should have
> been sorted. The pins are a very odd shape and the holes are sort of
> elliptical. I've worked out how to set up and re-machine but am unsure of
> how much clearance to leave twixt holes and pins. How does say 0.002" sound?
>
> thanks for any thoughts
> --
> Roland Craven
> Nr. Exeter, Devon, UK
> rol...@petternut.co.ukwww.petternut.co.uk
It all depends how accurately you can pitch the holes.At 0.002" you`re
going to have to be good.Additionally you would need to clock the
alignment on assembly or you may find a shaft breaks
eventually.Allowing for all the possible errors that may creep in I
would leave 0.005" clearance.I`m assuming we`re talking the fit of the
pins into the other half of the coupling,not the half they are fixed
in.
Mark.
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> genset. The flywheel and dynamo drive flange each have pins (3/4" and 1 1/4"
> respectively) bolted to them which engage in holes in the other and there is
> 1/4" leather sandwiched between the flanges.
> Its obviously been run both out of alignment and long after it should have
> been sorted. The pins are a very odd shape and the holes are sort of
> elliptical. I've worked out how to set up and re-machine but am unsure of
> how much clearance to leave twixt holes and pins. How does say 0.002" sound?
>
> thanks for any thoughts
> --
> Roland Craven
> Nr. Exeter, Devon, UK
> rol...@petternut.co.ukwww.petternut.co.uk