Calculating the radius of multiple rope pulleys
Calculating the radius of multiple rope pulleys
(OP)
I am trying to calculate the radiuses of the different pulleys. It is a modification of a double tackle block and tackle pulley. On a typical pulley all of the radius are the same and can spin freely. To save cost and space I wanted to combine the four separate pulley wheels in to two multi pitched pulley wheels. I need help trying to figure out what all the radiuses should be so that there is no rope slippage. Does anyone knows of the equations or formulas for this style of pulley. My first attempt was close but I am still getting rope slippage.





RE: Calculating the radius of multiple rope pulleys
RE: Calculating the radius of multiple rope pulleys
I am using Commercial Grade Nylon-coated Ss Wire Rope, 3x7 Hollow Core, .032" - .037",110# Brk Strg,25'l
RE: Calculating the radius of multiple rope pulleys
It can work if the two pulleys on each axle are independent of each other and can rotate at different speeds.
Mike Halloran
Pembroke Pines, FL, USA
RE: Calculating the radius of multiple rope pulleys
RE: Calculating the radius of multiple rope pulleys
Ted
RE: Calculating the radius of multiple rope pulleys
RE: Calculating the radius of multiple rope pulleys
Thank you for the kind words anyway.
Mike Halloran
Pembroke Pines, FL, USA
RE: Calculating the radius of multiple rope pulleys