motor driven extractors: a question about the motors?

[Donn Buchfinck]

Hi,
I was wondering,
On the motor driven extractors, what is the horsepower rating on the motors, the RPM of the motors, and then what is the rpm of the cage when it is running full on.

What I am looking for is the ratio between the motor and the reducer or gears.

Some motors run at 1725 rpm some 3450 rpm and there are other rpms out there of motors.

and if you have a gearmotor, that is a motor with the reduction gears together I am interested in the information

thank you,

[Lew Best]

Hey Donn

I have a 24 frame radial; has a slip clutch arrangement to allow it to get up to speed. It's old; but as I recall with the pulleys used the final ratio gives about 400 rpm. It has a 1725 rpm half horse 110v motor.

Lew

[George Fergusson]

Good question Donn. I've been pondering such things myself. Are you working on building an extractor? I'm coming up with a scheme to convert a washing machine into a radial extractor.

George-

[tecumseh]

I think (I have never really put a rpm test to an extractor) that most extractors run at about 300 rpm. I am probably preaching to the choir here, but most extractors begin their operation by turning slowly and then are slowly speeded up to acquire max speed when the frames are actually empty. Radial extactors 'must' run for several minutes to do their job effectively (and this is why radials are not hand operated).
I have a very small extractor that I use a large (and old) 1/2 drill motor chucked directly to the extactor shaft. I control the speed by using a large rheostat that probably came from an old electronic lab. DC motors are another good choice since they have lots of torgue and are adaptable to electronicly controlling the speed. It is also not that difficult to convert ac wall plug juice to dc in a fairly economical manner.