Crane drum is the component to wind wire rope in the lifting mechanism.
Crane drum consists of drum shaft, flange type annular gear,drum hub,bearings,bearing pedestal.
When one end of drum is equipped with the switch of rotary type position limitation limiter,it must ensure to make drum shaft and rising limit switch rotate synchronously.   

  Material: Q235 ,Q345 ,45#
    Heat treatment :hardening and tempering,high frequency quenching,carburizing quenching and so on
    Groove surface quench: HRC45-55
    Groove surface quench depth: ≥2mm
    Max processing diameter: 2,000mm
    Inspection:all items are checked and tested thoroughly during every working procedure and after the product is finally manufactured to ensue that best quality product goes out in the market.