[Norm M.]

Last year, our robot used a pair of the gearboxes on each side. (Four total). We chained the front to the rear, thus making a 4 wheel drive, skid steer robot.

We used the drill motors in the stock configuration (geared down 2:1) on the rear gearbox.

We used the FP motors on the front gearbox, with the large and small gear swapped (thus geared up 2:1).

This combination worked quite well. One thing to remember about 'pushin and shovin' is that the circuit breakers are quite often the limiting factor in how much power you can put into your robot. Thus, using the FP and Bosch gave us (70amp x 12v) watts of power available. A Chip and Bosch would have given us (80amp x 12v) watts. Of course, there are thermal constants and time constants associated with the breakers.

A good gearbox with the Chip and Bosch tied to together is a lot of power. But it takes some gearbox work to get there also!

Regards-
Norm Muzzy