On 4/27/2012 11:50 PM, Grant Saviers wrote:
> 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.
These tend to be a bit more precision and the ones I looked at ran $60
to $80 for the combination, or up to $160 for the set up minus chain.
OTOH they might be worth it as it'd be more or less a case a put it
together and go. This arrangement woks well with the timing belt as
well although I've not looked up the price on that combination yet.
> Grant KZ1W
> 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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