Girth gear is key part of rotary kiln and ball mill. High quality for girth gear is required for long time operation requirement.

1. Special Heat Treatment Technology

Great Wall Steel Casting adopts special heat treatment technology to optimize structure, improve hardness and enhance impact resistance of girth gear.

2. Long Service Life

Great Wall Steel Casting adopts high strength steel to produce girth gear. Firstly characteristics optimization of rotary kiln is done to guarantee its stability during long time operation, also to prolong its working life.

3. Factory Price Custom&Quick Delivery

Great Wall Steel Casting has strong steel casting production capability, and it can provide girth gear in large quantity with short period.

Treatment Technique

 
1.       Shot peening
2.       Bluing
3.       Phosphating
4.       Nickel-plated
5.       Zincing
6.       Heat treatment
7.       Carburzing
8.       Quenching
9.       Tempering
10.      Oiling
11.      Greasing
12.     Special color
13.     Stain proofing
14.     Pre-stretched and anti-fatigue
 

Testing Process

QA DOC: Chemical Composition Report, Mechanical Properties Report, UT Report, Heat Treatment Report, Dimensions Check Report

The data on chemical composition report and mechanical properties report are approved by third party, Luoyang Ship Material Research Institute, CSIC.
UT test: 100% ultrasonic test according to EN10228-3, SA388, Sep 1921 C/c etc.
Heat Treatment Report: provide original copy of heat treatment curve/time table. 

Specification

Specification
Item	Forged Steel Gear
Precision grade	JIS grade N5 (JIS B1702-1:1998) JIS grade 1 (JIS B1702-1:1976)
Pressure angle	Customized
Material	Die steel, alloy steel, stainless steel, etc.
Application	Metallurgy, mechanical facilities, etc.
Packing	Seaworthy plywood packaged on stell pallets or as customers’ request
Delivery date	Depends on the amount and dimension of products

Great Wall Casting’s big gears are applied in rotary kiln and ball mill of 5000 tpd cement production line in domestic famous cement enterprises, such as Xinjiang Tianshan Building Material Group, Henan Mengdian Group, etc. and provide reliable guarantee to normal operation of rotary kiln and ball mill.

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