Torque on a shaft

[blake92]

If a motor has a horsepower of 5hp and a gear box ratio of 10:1 does the hp through out the system remain 5? or does the gear box multiply the power?

how does this affect the torque?

 

[Doug Huffman]

Power is constant through a transmission and is the product of torque and angle rate.

 

[Averagesupernova]

Power is constant through a transmission and is the product of torque and angle rate.

...minus the loss due to inefficiencies. Not to nitpick on you Doug Huffman, but considering the OP's question I think it is worthy of pointing out.

 

[dean barry]

power out = power in * efficiency
torque out = torque in * (input speed / output speed) * efficiency