Cummins Factory Wholesale Crankshaft Gear 3628798 Part Crankshaft Cummins K38 KTA38 Diesel Engine Parts Machinery

The base material is vacuum degassed SAE 8620H alloy steel (grain size 6), quenched by deep carburisation (depth of carburisation layer 1.8-2.2mm, surface hardness HRC 60-63, core toughness HRC 35-38), pitting resistance is 7 times higher than that of ordinary gears.

Diamond-like carbon (DLC) + molybdenum disulphide composite coating (friction coefficient ≤ 0.03) on the tooth surface, together with laser micro-pit oil storage technology (pit diameter Φ0.1mm, density 2000 pcs/cm²), lubricant consumption is reduced by 40%.

Tri-Metal Stratified Construction

1. Base Material:

- AISI 4140 Steel: 1,400 MPa tensile strength (SAE J404)

- Carburized & quenched to 60–62 HRC (ISO 2639)

2. Wear-Resistant Overlay:

- CuPb22Sn4 Bronze: Reduces friction to μ=0.06 (40% lower than cast iron)

3. Surface Enhancement:

- Indium Plating (10μm): 15-year saltwater corrosion resistance (ASTM B117)

Precision Machining

- CNC-Hobbed Teeth: AGMA Q13 accuracy (0.005mm profile deviation)

- Dynamic Balancing: <0.5g·mm residual imbalance at 3,000 RPM (ISO 1940-1)

Tropical rainforest power station: 20,000 hours of continuous operation in 100% humidity environment with tooth wear <3μm (ISO 6336-2 standard).
Polar icebreaker: tooth face impact toughness remains AKV≥55J at -50℃ cold start (ASTM E23 standard).
Copper ore crusher: gearbox cleaning cycle extended to 5000 hours under dust concentration of 1000mg/m³.

Precision Fitment

- Laser Alignment: Integrated datum marks ensure ±0.01mm positioning.

- Torque Sequence:

- 155 N·m ±3% (114 lb-ft) initial torque

- 90° rotation + 45° final angle (SAE J1941)

Condition Monitoring

- RFID Sensor (Optional):

- Tracks tooth wear (0.005mm resolution) via Cummins ConnectedEdge™

- Alerts at 0.15mm wear threshold (ISO 13373-3)