Description:

Our Zoomlion QUY70 Top Roller is specially designed for Zoomlion QUY70.Utilizing high-quality raw materials, it undergoes a series of processing techniques, including forging, quenching, tempering, and surface hardening.

Zoomlion QUY70 Top Roller Description

Apply Model	Zoomlion QUY70 Crawler Crane
Technical	Forging
Production Time	80% are stored in warehouses, some for 7-10 days.
HS Code	8431499900
Components	wheel body / end cover / copper bushing / Oil seal / O-ring / shaft
Color	Black or can be customized
Certification	ISO 9001 : 2015 SGS

FAQ

1 Why does the crane top rollers wear out severely after only a short period of use?

A:The material grade is insufficient, or the heat treatment process is inadequate.

Our Solution: We utilize high-quality 50Mn/40Mn2 alloy steel and incorporate a surface quenching process. The finished tread hardness reaches HRC 50–56, with a hardened layer depth of 8–12 mm, extending wear life.

2 Why do crane top rollers deform or fracture after a period of operation?

A: This is typically caused by insufficient strength or excessive brittleness in the core of the wheel body. The underlying reason is lack of control over the quenching and tempering process.

Our Solution: We employ a quenching and tempering treatment to achieve an optimal balance between strength and toughness, enabling the material to withstand the severe impacts encountered on rugged terrain.

3 If the crane top roller fails to rotate or produces abnormal noises, what is the problem?

A:There are two most common causes. First, poor material quality of the internal copper bushing .And second, seal failure resulting in grease leakage or the ingress of silt and sand.

Our Solution:

Pure Copper Bushings: Crafted from high-quality brass, offering both excellent self-lubricating properties and corrosion resistance.

Multi-Layer Sealing: Employs a combination of floating oil seals and O-rings to effectively prevent grease leakage while blocking the ingress of external dirt, sand, and moisture.

4 I urgently need a crane top roller, but my supplier says I have to wait a month. What about you?

A:We own our own factory and automated production lines, and maintain ample stock of finished goods for standard models. We can respond rapidly to urgent orders and ensure timely shipment, eliminating the need for long wait times.