Does the bigger NEMA23 stepper have a flat on the shaft?

Does the bigger NEMA23 stepper have a flat on the shaft? If not, don’t the pulleys slip frequently?

If my 141oz-in steppers are getting hot on long jobs, will the 262oz-in steppers run cooler?

According to Inventable’s website, the motor 25311-03 is 262oz-in, NEMA 23, with a Single shaft.
There is no mention of a flat spot.
The motor I bought from them in January also does NOT have a flat spot on the shaft.
@MattWheeler if its critical you should contact Inventables directly, or simply file your own flat spot on the 262 oz motors.

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Dremel creates a nice flat spot. I also add a small groove in the shaft to receive the set screw and use blue locktite (very, very little), and mine have never slipped.