One other input - many larger pulleys/sprockets/timing drives are made
with shaft adapters so one sprocket/gear/pulley size can fit many shaft
diameters. Check the catalogs for this style of "sprocket" and buy the
appropriate shaft adapter.
On 4/27/2012 2:00 PM, K8RI wrote:
> On 4/27/2012 4:34 PM, Jim Hoge wrote:
>> Check McMaster- Carr. They list them but with a higher price tag. The
>> manufacturer you want to search is Martin Sprocket and Gear. Any supplier of
>> power transmission equipment ought to carry them. If you can tolerate a
>> larger outside dimension then you can away from searching for only finished
>> bore sprockets and go for bushing bore sprockets as well.
> I had e-mailed them earlier. I just received a reply back stating they
> could not make a recommendation for my application which was:
> 2" ID/Bore, finished or machinable, OD of roughly 4" and a linear force
> on the chain of 500# which includes a safety factor.
> I know I've seen systems that ran far more force than this.
> Torque on the 2" shaft is roughly 1000 inch # at maximum wind gust. With
> an OD of 4" this is reduced to 500# which would translate to 500 linear
> # on the chain.
> OTOH the small rotator can go to about 1500 in # so that would translate
> to 750 # of linear force on the chain.
> I have looked at the bushing bore sprockets, but not specked any out.
> Roger (K8RI)
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