Stepper motor strength? - CNCzone.com-The Largest Machinist Community on the net!

HereinCS · #1 07-06-2010, 10:55 PM

I'm trying to grasp how powerful a particular stepper motor is, but I'm not familiar with the oz system. My cordless drill puts out 450 in-lbs of torque, is a 495 oz motor about the same?

ger21 · #2 07-06-2010, 11:27 PM

No, the drill is 16x more powerful. Steppers are typically rated in oz-inches. This is the amount of weight they can hold 1" from the center of the shaft. The stepper can hold 495 ounces. The drill can hold 450 pounds. 16 ounces in a pound. So the drill is equal to a 7200 oz stepper.

HereinCS · #3 07-06-2010, 11:38 PM

So its oz/inch? Makes the 495 oz motor seems like a weakling.

jsheerin · #4 07-07-2010, 07:49 AM

No, it's ounce*inch. Torque = force * distance.

It's possible the rating on your drill is optimistic (possibly it's peak torque). Steppers are a bit more tied to reality.

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