1. Adopt special heat treatment technology to improve the structure optimization, the hardness, and enhance the wear-resistant and anti-impacting performances.

2. Adopts high strength steel materials.

3. Optimize girth gear based on the operation characteristics of the rotary kiln and ball mill, to ensure the stability of the girth gear during the long time operation and extend its service life.

4. Great Wall Steel Casting has large production capability in steel castings, so we can provide girth gear with short cast period and large amount.

CHAENG Girth Gear (Rotary Kiln or Ball Mill) Quality Testing:

1. Girth gear rim is casted in two halves

2. Nondestructive testing is performed to ensure zero defects

3. Machining of gear in multiple steps to ensure best finish and accuracy 

4. Final quality inspection to ensure CPG quality

Girth Gear Quality assurance:

The fabrication route is governed by the provisions of the implemented Quality System ISO 9001: 2000. The standard documentation ensures the full traceability of every process step:

• Manufacturer test certificates according to DIN EN 10.204 § 3.1 including chemical composition, mechanical properties and non-destructive examination;

• Dimensional check supported with a "s-built" sketch;

• Record of the heat treatment chart;