07-20-2015, 03:59 PM
its an endless chain or chain block hoist . a block and tackle is ropes and sheaves .the block part reffers to the sheave block or set of pullys a 2 and a 3 or whatever combination and the tackle reffers to the ropes
johno
johno
texx, proud to be a member of MetalworkingFun Forum since May 2014.