Girth Gear-For Mining Grinding Mill
Girth Gear-For Mining Grinding Mill
Girth Gear-For Mining Grinding Mill
Girth Gear-For Mining Grinding Mill
Girth Gear-For Mining Grinding Mill
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Girth Gear from HENGIN main features are large-modulus, large-diameter, integral or split casting products used in Ball mill, AG mill, SAG mill and Rod mill in the mining field.
■ Material Standard
Complying with the American Society of Testing Material and the International Standardization Organization (ASTM&ISO) standards ANSI/AGMA 2015 and GB/ T10095-2008 or according to the requirement by the user. 
■ Girth Gear Manufacturing Standard 
A G M A6114—2006 (Metric) Accuracy class, calculating according to Q8 accuracy class, processing according to Q10 precision class, or according to the requirement by the user's drawings. 
■ Manufacturing Process
Casting→Annealing→Roughing→NDT→Gear Hobbing→Normalizing or Quenching and Tempering→NDT→Finishing→Packaging.
■ Hengin's Girth Gear Main Parameters
◆Standard: ANSI/AGMA 2015 , GB/T10095-2008;
Manufacturing Method:Casting, Machining;
◆Structure:Whole, valved;

◆Max Modulus:50;
◆Max Hardness:HB350;
◆Max  Diameter:145000mm;
◆Max Weight: 144000K. 
        ■ Hengin's Experience
Based on the experience of casting, heat treatment, machining, gear manufacturing and equipment operation feedback, our company has three kinds of girth gear casting materials whose chromium, nickel and molybdenum components are different that meet the three different design strength and hardness requirements. Factors such as performance, modulus, pressure angle and helix angle, tooth width, tooth surface contact pressure, and axial force are considered to optimally design the grinding mill girth gear. For milling transmission, a 25° pressure angle is used to increase the milling capacity by approximately 10% compared to a 20° pressure angle. The helix angle is also limited to 7.5° to maintain the control of the axial force. Because the helical gear transmission is larger than the spur gear transmission which has the same diameter, the bending strength and contact strength are greatly improved, the transmission is stable, the noise is small and the service life is long. 
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