1）crane Sheaves block structure

2） crane Sheaves block description

   1. Sheave large range of size available: Φ800 mm~Φ3000mm 

   2. Sheave rim Forging Material : 45(S45C); Q345B Q345D,Q345E( used for -40℃) ,35CrMo and so  on or according  clients request for sheaves 

   3.  Sheave groove : 

       a. Groove profiles : according client request  and manufacture by CNC .  

       b. groove heat treatment by intermediate frequency  quenching , hardness Min. HB350-370 and deep around  ≥2.5mm .  (different material can getting different hardness ) 

       c. Groove MT test after heat treatment 

   4. Sheave welding process according WPQR (WPS) AWD1.1 welding line