• Introduction:

The pulley block is widely used in cranes, winches, elevators and other machinery, and is an important component of lifting machinery.

The pulley for the crane is always with the wire rope and hook block. It is a fixed pulley that works in conjunction with the hook group, fixed to the structure, composed of several fixed pulleys and moving pulleys. It can save effort and change the direction of force action.

• Features:

1. Material: The material of the pulley is generally HT15-33 cast iron, and for grab buckets and special-purpose cranes, ZG35 II cast steel is often used. To improve the efficiency of the pulley group and improve the usage conditions, rolling bearings are used for the bearings of the pulleys.

2. Rope groove: The groove radius is often set to R=0.6d, and the contact surface between the steel wire rope and the groove should be as large as possible.