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I am confused with the torque ratings of servo motors, or I guess it is general while choosing any motor.

For example a servo's torque is rated as 10kg-cm, so does that mean it can handle a 100N force from 1 cm distance to its center or 50N force from 2cm distance?

Am i interpreting it right?

If it is right, then consider a motor mounted to the wall from its back and a rope is wrapped to its tip(the rotating part, i don't what it is called); then how should I calculate the maximum weight the motor will be able to lift upwards?

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Yes, you are right. 10kg-cm = 100N force from 1 cm distance. You can use a servo motor with nominal torque force 10kg-cm to lift up 10 kg-cm, but you will most likely damage gears fust. enter image description here

For example, there is a dependency chart of rotation speed (degree) vs load (kg), for KST Servo x10 v2.0 (9.5 kg, 7.4V, 1.2A) https://www.kstsz.com/kstsz_Product_2042526799.html, so you can estimate lifetime for your servo's motor.

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  • $\begingroup$ Why using the motor at "nominal" values damages it? What should be the safety margin then? $\endgroup$ – muyustan Oct 10 '19 at 7:15

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