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Tel: (00)86 21 51696870

Fax: (00)86 21 60818967
Web: www.special-metal.com

E-Mail: sales@special-metal.com 

ADD: No.3500, Xiupu Road, Shanghai, China


Girth gears

Girth gears

Weight: 10~35T 

Applicable devices: rotary kiln, ball mill, tube mill

Application: Cement, building material, metallurgy etc. 

Customizable or not: Yes 


Product introduction 

Gear ring is the main part of rotary kiln and ball mill which has to run for a long time, therefore, there is high quality requirement for gear ring in production.

Our main material for the Gear ring is similar to followings:


                                                              Standard Specifications for Cast Steel

Country                                                                Standard                                                           Grade

United Kingdom                                                    BS EN 10083/2-1991                                        C45

USA                                                                      ASTM A 29/A29M-04                                        1045

Germany                                                              DIN EN 10083-2-2006                                       C45/CK45

Japan                                                                   JIS G5111                                                         SCC5

International                                                         ISO 683/1                                                          C45/C45E4/C45M2



Heavy Load Transmission Gear Ring Hardness Comparison




Type

Treatment

Hardness

Pinion

Gear

Pinion

Gear

 

 

Spur Gear

 

 

Quenching &   Tempering

Normalizing

240~270HB

180~220HB

Quenching &   Tempering

260~290HB

220~240HB

Quenching &   Tempering

280~310HB

240~260HB

Quenching &   Tempering

300~330HB

260~280HB

 

 

Helical Gear

 

Quenching &   Tempering

Normalizing

240~270HB

160~190HB

Normalizing

260~290HB

180~210HB

Quenching &   Tempering

270~300HB

200~230HB

Quenching &   Tempering

300~330HB

230~260HB


                                                           

                                                             Standard Specifications for Cast Steel

Country                                                                  Standard                                                            Grade

United Kingdom                                                      BS 970-1                                                            708 M40

USA                                                                        ASTM A 29/A29M-04                                          4140/4142

Germany                                                                DIN EN 10083-1-1996                                         42CrMo4

Japan                                                                     JIS G4053-2003                                                  SCM440

International                                                           ISO 683/1                                                            3


Advantage

Shanghai Special Metal Co., Ltd adopts unique heat treatment to optimize the gear ring structure, to enhance hardness、wear resistance and impact force.

Shanghai Special Metal Co., Ltd uses high strength steel to cast gear ring and optimize rotary kiln to ensure the stability under long working time and prolongs service time.

Shanghai Special Metal Co., Ltd has a strong ability of producing steel casting and we can do mass production of gear ring in short cycle with large amount.

Production Process  

1. Wooden pattern Production  

2. Molding 

3. Pouring 

4. First cleaning 

5. Heat treatment – grinding (inspection)

6. Rough machining (inspection)-finishing machining (inspection)

7. Packing-delivering

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 “as-built“ sketch; 

• Record of the heat treatment chart;

Pictures

heay duty part of mining machine.jpg

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