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· the sum of resistances = tractive pull. the tractive pull multiplied by the drive pulley radius will give you the load torque. there is no short cut for deciding the load torque. this cannot be calculated from motor side. 5) having decided the load torque, you can decide the required power at motor shaft, available motor size, gear ratio and so on.

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a ball mill is one kind of grinding machine, the physical constants used in these calculations are m the mass of a ball and j the

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and its mass is m = 0.800 kg. ——— a statics problem, even though the wheel moves. we calculate the maximum force that doesn't move the wheel, and an inﬁnitesimal amount more force does move it. xfbd for wheel: a circle. mg down, at center; n g upward, at bottom; n e angled up/left, at contact with the edge of the step; f~ 0 to right, at center. ~a = 0.

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