Calculate Torque in a Sprocket or Pulley Given Belt or Chain Tension

[@CyborgVampireBell]

I wish you were my teacher, I could have learned this! My life would have been different.

[@atila8623]

Nice

[@abuzuhair9945]

Please elaborate a bit on direction of friction on belt and pulley

[@INTEGRALPHYSICS]

In the absence of friction the belt would just slide over the output pulley. It is friction that 'transfers' force (or really energy) from the belt to the pulley. By it's very nature friction will always resist the relative motion between two objects, meaning it will act tangentially on the pulley to move the pulley in the direction the belt is moving, and in turn (3rd Law) it will act against the motion of the belt.

[@vorapobautomation9760]

How to calculate the speed in MPM. of web wider and unwinder machine if the empty roll diameter = 0.934 m. and the web thickness is 1mm. ?

[@rationallyjustified]

im trying to calculate the amount of HP an AC motor requires with any 2 pulleys (1 attached directly to the motor) the other attached with a rope that would go to another series of 4 pulleys with 40 lbs. (less pulleys could be used) my idea is to basically use old drilling techniques to make a power hammer for blacksmithing, i saw old mining rights with a slack rope to and it inspired this contraption. sorry i'm ignorant when it comes to math. any ideas?

[@AbrahamMorrisNoahjrTv]

Sure

[@shooter7a]

kind of a crock....you did not even solve an example...