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I am looking at servos to make a robot claw, and I want to make sure the one i am getting can turn under a specific amount of weight. The servos specify their torque in oz-in. I am not sure how to read this.

What i need to know is, how to I convert oz-in into the specific weight it can withstand in lbs.

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If you are not familiar with the unit of measurement:

1 oz-in = 0.00706 Nm

if you are not familiar with torque:

1 Nm torque translates to 1N of force at a radial distance from the shaft of the motor of 1 m. As 1N gravitational force corresponds to an approx. 0.1kg weight, 1 Nm torque can lift* 0.1kg weight 1m away from the shaft, or 1 kg weight 0.1m away from the shaft.

*Lift in this case means that if such weight is attached to the rotor, the rotor would be in equilibrium, less weight then this would start to rotate.

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  • $\begingroup$ So, if i had a length of 2M with 1Nm, would that make 0.5N? @50k4 $\endgroup$
    – X Builder
    Oct 21 '20 at 22:54
  • $\begingroup$ exactly, 2m radial distance, 0.5N $\endgroup$
    – 50k4
    Oct 21 '20 at 23:06

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