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Main Data

  • Description: Alloy steel Internal gear segment
  • GEARX No.: SGS10-7.1GB
  • Module: 10 mm
  • No. of teeth: 17
  • Degrees covered: 7.1°
  • Pressure angle: 20°
  • Material: 42CrMo
  • Heat treatment: Through quenching and tempering
  • Tooth hardness: HB260-280
  • Tip Diameter: 4317.02 mm
  • Reference diameter: 4307.02 mm
  • Root diameter: 4294.52 mm
  • Face width: 65 mm
  • Tooth surface finish: Grinding
  • Accuracy grade: DIN 7
  • Weight of gear blank: 28 kg
  • Weight: 20.5 kg

Application

  • Aircraft manufacturing

The Main Fabrication Procedure

  • Single 7.1° sector rough machining, 1 mm allowance
  • Stress relieving
  • WEDM

Technical Documents

  • Inspection certificate of material
  • Heat treatment certificate
  • Size tolerance and geometric tolerance report
  • Inspection report of tooth

Ralative Standards

  • DIN 3961 Tolerance for cylindrical gear teeth; bases
  • DIN 3962 Tolerance for cylindrical gear teeth
    • Part 1 Tolerance for diviations of individual parameter
    • Part 2 Tolerance for tooth trace deviations
    • Part 3 Tolerance for pitch-span deviations
  • DIN 3967 Tooth thickness allowances
    • Tooth thickness tolerances
    • Principles