How do I measure torque from a shaft?

[9935E]

@DrewWHOOP

What you probably want to find is the stall torque

Okay I’m going to do that. Also I’m assuming that I should still find acceleration speed but I should calculate torque with what Kmmohn said.
Also does anyone know the stall torque of V5 motors?

Edit:

V5 Motor curve

Old 393 motor is 3.93W New V5 motor is 11W That’s where the approximately 2.5x comes from.

In this topic callen said something about stall torque being less important

@callen

Also, don’t just look at the stall torque. V5 motors don’t look nearly as good if you look at stall torque alone. Look at how the torque doesn’t just die off right away as speed goes up. The peak power is at roughly 60 rpm with the red (100 rpm) internal gears. Those 11 W will give about 1.75 N m at 60 rpm. Try doing that with a 393. The 393 will give you about 0.625 N m at 60 rpm (assuming 60 rpm is also where its peak efficiency is)

So with this knowledge I might just calculate torque with the acceleration and not use stall torque as my main way of calculating it. I’m assuming that the first link kmmohn sent would be the most accurate way I could calculate torque and I don’t want to spend all my money on that.