Motor and Gearbox Pairing

[darrell_gray]

Hello,

I was wondering what factors to consider when sizing a motor and gearbox. Assuming I have two systems which both achieve the desired torque and speed, one is a larger motor with a smaller reduction, the other is a smaller motor with a larger reduction.

Apart from the obvious size and cost, what are some comparisons I can make between the two? Will there be notable dynamic differences between the two?

Thanks,
Darrell

[Kelly_Bramble]

Start with torque and RPM requirements which will define gearbox requirements then size motor appropriately.

[darrell_gray]

Hi Kelly, thanks. I'm not picking a gearbox and motor from a catalog per sè, rather I'll be making these specifications myself.

There is theoretically an unlimited number of combinations that could achieve a certain speed and torque.

I am more curious about the less obvious differences when comparing two ends of the spectrum.

a) larger slower motor with lower reduction
b) smaller faster motor with higher reduction.

Best Regards,