Steel Coiling Block for Gantry Crane 1.Supply the best Bearing for the customer 2.Steel or Cast iron is ok Description:1.Method of the Pulley Die forging Sheave , with light weight, large bearing capacity, good wearing resistance and long service lifeSheave(external diameter Φ1300) features: 1) Material: Q235B, Q345B, 35#, 45#2) Heat treatment :hardening and tempering,high frequency quenching, ...