Cheap gearboxes (DeWalt and Globe) for Offseason project

[dbonar]

I hate to reply to my own post but I have a related question.

Is there any way to tell how much a given gearbox could be expected to survive? There are loads of 12 and 24V gearmotors sold for less than $20 that could have their motors replaced, if they would survive much higher rpms and torque than what was expected with the original motor.

[IKE]

Is there a reason you need to use a 775 motor? Are you trying to make something that is/could be FRC legal?

Stalling 775s is a bad idea. It is a vented motor, and they do not like to be stalled for extended periods of time.

If you can share more details on the what/why of the application, we could probably help you out better.

When you say "drive motors" do you mean driving an actual thing like a robot/go-cart....

[dbonar]

RS775 motors are mostly selected due to cost and the fact that I have RS775 motors and lots of motor controllers that can deal with them. There is no need to be FIRST legal on any of this; in fact I'm leaning towards 24V operation. Heat, especially near stall, is a serious issue but I'm looking at ways to add extra fans independent of the motor fans.

The project started as a test bed vehicle for our programmers -
1. Create a mecannum drive platform since we've never done that in LabView.
2. Integrate sensors and vision processing to allow for better autonomous actions

However its also been handed to me, as the slightly more mechanical sponsor, to see if it can be expanded to either a ride on or at least able to complete a 20 minute drive time in autonomous mode. So I'm looking at figuring out if we can reasonably move around 100kg (it might be much less but the first pass at the design is for the worst case ride on situation) with all 4 wheels independently powered.