Stall torque and Drive torque

Help & Support Robot Parts
1

I was wondering what the relationship between torque and stall torque are.
For example if I had a bot which required .5 Nm torque which motor would I buy if only stall torque is specified?
I need the motor to go at 420 RPM

any suggestions?

Thanks

2

Hi,

The rated torque is the maximum continuous torque that the motor produces at rated RPM when working normally and without overheating, whereas the stall torque is produced by the motor when RPM is 0 while the load is attached or at starting.
DC Motors manufacturers usually provide the stall torque rating. You can estimate the rated torque as 20%-30% of the stall torque.
For example, if your robot requires 0.5Nm torque, you would need a motor with a stall torque rating of 1.6-2.5Nm.
You can take a look at our DC Motors comparison table for you to find an appropriate motor for your application.
This Drive Motor Sizing Tool might also help you.