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
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