products

The Main Data

  • Description: Ship lift gear rack
  • GEARX No.: CR62-470H
  • Module: 62 mm
  • No. of teeth: 24
  • Pressure angle: 20°
  • Material: G35CrNiMo6-6+QTI DIN EN 10293
  • Heat treatment: Through quenching and tempering, tooth surface induction hardened
  • Hardness of rack body: HB260-300,
  • hardness of tooth surface: HRC≥50
  • Case hardening depth(CHD): 6~9 mm
  • Length: 4,705 mm
  • Height: 492 mm
  • Face width: 810 mm mm 810
  • Rack width: 1,160 mm
  • Tooth surface finish:
    • Gear milling by special milling cutter
    • Dedendum milling by special milling cutter
  • Accuracy grade: DIN10a27
  • Weight of gear blank: 24,500 kg
  • Weight of rack: 11,300 kg

Applications

  • Vertical ship lift system

The Main Fabrication Procedure

  • Upon request

Technical Documents

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

Relative Standard

  • 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