Pulley diameter

[boricuastructural]

How do I calculate the diameter of a pulley for a given tension in a cable? My force is 20 kips.

 

[Tony71502]

Refer to ASME BTH-1-2005 (Design of Below-the-Hook Lifting Devices)

Your force should dictate rope size, then rope size dictates sheave size.

 

[FeX32]

What does the pulley do?

Fe

 

[boricuastructural]

the pulley is just changing the direction of the cable. is going to be fixed t0 the floor.

 

[BobM3]

Cable life would probably be your biggest concern. You would want a pulley diameter equal to so many times the cable diameter. It depends on the cable type (how it's wound and its material). Values of D/d of 30-80 are generally recommended. Your cable supplier might be able to help you pin it down.

 

[chicopee]

Pulley (sheave) size or diameter will be highly dependant on the wire rope size and type. The ratio of sheave to rope diameters can range from 15 to 30.
I would suggest that you get reference material such as Mark or Kent ME Hanbooks and Shapiro's Cranes and Derricks.