Overview

The production cycle for rolling pulleys is short, with consistently high-quality output. We manufacture a wide range of rolling pulleys with diameters from Φ250mm to Φ1600mm, using materials such as Q235B, Q345B, 1045, and 42CrMo.

For rolling pulleys intended for port applications, wire rope grooves require quenching. We apply surface quenching to 1045 steel, achieving a groove hardness of HRC40-55 and a depth of ≥2mm. This process creates a smooth, wear-resistant surface on the rope groove, extending the pulley’s service life by approximately 1.5 times.

Additionally, our production standards ensure a pulley diameter runout of 1/1000D and face runout of 3/1000D, as required for port cranes, such as those manufactured by ZPMC.

The following is the simple description for each type

Cast gray iron pulley

Advantages: Excellent casting process, small abrasion on wire ropes.

Limitations: Lower strength and shorter lifespan

Application: Suitable primarily for low-grade work environments.

Nodular Cast Iron Pulley

Advantages: High strength, good impact toughness, and enhanced abrasive resistance.

Limitations: High surface hardness, which may lead to more significant wear on wire ropes. 

Typically Application:Used in higher-demand environments.

Cast Steel Pulley

Advantages: High strength and balanced performance for long service life.

Applications: Widely used in production settings due to its durability.

Rolled Pulley

Advantages: Strong, lightweight (40% lighter than cast pulleys), with a balanced structure and attractive appearance. Reduces material use.

Manufacturing Process: Made from high-quality steel, numerical cut, hot-rolled on a pulley rolling mill, welded with Ar+Co2 gas protection, thermally annealed, and finished with shot blasting.

Welded Pulley

Applications: Suitable for non-standard or custom-shaped pulleys, such as those with double web angles.

Manufacturing Process: After rolling, the pulley undergoes double web angling, hub assembly, annealing, and flaw detection. For additional strength, reinforcing plates or tie pieces are welded to each web side, enhancing rigidity and strength.

Nylon Pulley

Advantages: Lightweight, good corrosion and abrasive resistance, self-lubricating, and insulating properties.

Applications: Commonly used in various crane types, including European-style cranes, insulated cranes, tower cranes, elevators, ships, and subways. Nylon pulleys are increasingly popular with advancements in high-polymer materials, promising substantial future potential.