dpb wrote:
On 9/21/2011 3:08 PM, HeyBub wrote:
...

... PTOs are (I think) fairly standardized...

_Very_ much so...540 (6-spline) and 1000 (21-spline) rpm are US
standards; virtually all larger tractors now have both as standard
equipment (interchangeable spindles, not two separate drives); smaller
utility tractors of the homeowner variety will generally be limited to
540 rpm.

To expand on the just-a-minute-ago post, why not a PTO for an automobile?

I can imagine a hook-up that replaces a tire on an auto's drive wheel. This
hook up could connect to a stationary item such as a generator or water
pump.

A car at idle burns about a gallon of gas per hour, which is not too much
different that the consumption of a medium-hefty generator.