High Quality Durable Large Gear Ring for Mining Machine

• Application: Machinery, Ball Mill and Rotary Kiln
• Hardness: Hardened Tooth Surface
• Gear Position: External Gear
• Manufacturing Method: Cast Gear
• Toothed Portion Shape: Spur Gear
• Material: Cast Steel
• Model NO.: Many specifications
• Type: Circular Gear
• Name: Girth Gear
• ISO 9001:: 2008 Certificated: BV & SGS Certificated
• Manipulate Way: Forced Manipulation
• Changes Way: Stepped
• Module: Less Than or Equal to 45
• Color: as Your Requirement
• Chemical Componet: as Per Technical Parameter
• Transport Package: in Container
• Specification: According technical parameters
• Trademark: citichl
• Origin: China
• HS Code: 8414901900
• Production Capacity: 500pieces/Year

Product Description

                High Quality Durable Large Gear Ring for Mining Machine   
 

Process: 
Forging/Casting
Normalizing&Tempering-Proof Machinnig
Quenching&Tempering
Finish Machining(Teeth Grinding)

We can offer you in various process conditions Solutions for Many End Markets and Applications
--Mining
--Metallurgy
--Power Generation
--Cement Plant
--Port Machinery
--Oil and natural
--Paper making
--OEM gear case
--General Industrial

Specification	Machining Scope
Size	OD Max 16m
	One Piece of Gear: OD Max 13m
	Assemble Gear: According to drawings
Hobbing Modulus	10-60
Milling Modulus	Up to 120
Spiral Modulus	1-15
Accuracy Grade	Milling: 6 grade
	Hobbing: 8 grade
Material	Alloy steel: 42CrMo4, 34CrNiMo6 etc.
	Carbon steel: C45E, 1030
	Carburizing steel
	Quenched and tempered steel
Heat treatment	Quenching & Tempering, Surface Quenching
Teeth Profile	Spur, Helical, Herringbone, Crown, Spiral, Worm and shaft

Inspection and Test Outline of Girth Gear:

No.	Item	Inspection Area	Acceptance Criteria	Inspection Stage	Certificates
1	Chemical Composition	Sample	Material Requirement	When Smelting After Heat Treatment	Chemical Composition Report
2	Mechanical Properties	Sample(Test Bar on the Gear Body)	Technical Requirement	After Heat Treatment	Mechanical Properties Report
3	Heat Treatment	Whole Body	Manufacturing Standard	During Heat Treatment	Heat Treatment Report Curves of Heat Treatment
4	Hardness Test	Tooth Surface, 3 Points Per 90°	Technical Requirement	After Heat Treatment	Hardness Teat Report
				After Semi Finish Machining
5	Dimension Inspection	Whole Body	Drawing	After Semi Finish Machining	Dimension Inspection Report
				Finish Machining
6	Magnetic Power Test (MT)	Tooth Surface	Agreed Standard	After Finish Gear Hobbing	MT  Report
7	UT	Spokes Parts	Agreed Standard	After Rough Machining	UT Report
				After Welded
				After Semi Finish Machining
8	PT	Defect Area	No Defect Indicated	After Digging After Welded	PT Record
9	Mark Inspection	Whole Body	Manufacturing Standard	Final Inspection	Pictures
10	Appearance Inspection	Whole Body	CIC's Requirement	Before Packing (Final Inspection)
11	Anti-rust Inspection	Whole Body	Agreed Anti-rust Agent	Before Packing	Pictures
12	Packing Inspection	Whole Body	Agreed Packing Form	During Packing	Pictures

 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.



Our company appearance:


Why Choose us?

1.Pre-sale services: enthusiasm
We provide you with the prophase plan, process flow design and manufacturer equipment according to your special demand.
2.one-year warranty to make sure your machine runs consistently.
We always offering lifelong services and provide spare parts for a long term,and repair main parts under right using for free in one years.
3.Technical services
3.1 Design of production line and solutions according to buyer's requirement. 
3.2 In 7 days after the receipt of deposit, the seller shall provide related technical documents for equipment installation, in addition to those with special requirements.
3.3 Before delivery, the seller can modify the previous solutions according to buyer's requirement.   
4.After-sales service
4.1 During the installation and commissioning, the seller shall send technician to the site for instruction of installation and commissioning, and for training of workers. 
4.2 If there is any equipment failure caused by the buyer, the seller shall assist the maintenance of machines and replacement of fittings, and charges appropriate fees. 
4.3 Beyond the guarantee period, the seller can provide services and fittings at a most preferential price. 
4.4The seller can provide consultation and inspection services freely for other products, especially for the up-stream and down-stream products of our equipment.