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Main Data

  • Description: Aluminum plate rolling mill gear shaft
  • GEARX No.: SDH30-23G 
  • Module: 30 mm
  • No. of teeth: 23
  • Pressure angle: 20°
  • Helical angle: 25°
  • Material: 17CrNiMo6
  • Heat treatment: Through quenching and tempering, then carburized hardened.
  • Tooth hardness: HRC58-62
  • Case hardening depth(CHD): 3.1-3.6 mm
  • Tip Diameter: 821.33 mm
  • Reference diameter: 761.33 mm
  • Face width: 2×740 mm
  • Tooth surface finish: Ground
  • Accuracy grade: DIN 6
  • Rotational speed: 2981 RPM
  • Weight of gear blank: 16,523 kg
  • Weight: 10,740 kg


  • Aluminum plate rolling mill

The Main Fabrication Procedure

  • Forging the gear blank.
  • Rough machining
  • Ultrasonic inspection
  • Quenching and tempering to HB270-320
  • Turning the gear.
  • Hobbing
  • Dimensional (run out) and quality test of the hobbing
  • Grinding
  • Inspection magnetic inspection the tooth flank, and then magnet demagnetization
  • Packaging and delivery to the customer

Technical Documents

  • Inspection certificate of material
  • Heat treatment certificate
  • Certificate of ultrasonic inspection
  • Magnetic particle detection certificate(on tooth flank)
  • Size tolerance and geometric tolerance report
  • Inspection report of tooth quality

Relative Standards

  • ANSI/AGMA 6004-F88 Gear Power Rating for Cylindrical Grinding Mills, Kilns, Coolers and Dryers
  • ISO 6336 Calculation of load capacity of spur and helical gears
  • DIN 3990 Calculation of load capacity of cylindrical gears