1.we can make 50pcs per day. 2.Out diameter:50~2000mm Specifications Sheave die forging Sheave , with light weight, large bearing capacity, good wearing resistance and long service lifeSheave(external diameter Φ1300) features: 1) Material: Q235B, Q345B, 45#2) Heat treatment :hardening and tempering,high frequency quenching,carburizing quenching and so on3) Groove surface quench: HRC45-554) Groove ...