KTA38 QSK38 QSK45 QSK50 KTA50 QSK60 3646065 Diesel Engine Parts Gear Idler For Cummins

The Cummins 3646065 gear idler delivers three-tier performance in extreme operating conditions:

- Ultra-Precise Timing: Maintains gear alignment within ±0.02 mm under 2,000 N dynamic loads (ISO 1328-1 compliant).

Vibration Control: Reduces harmonic noise by 42% compared to standard idlers (SAE J244 certified).

Extended Service Life: 3.8× longer fatigue life through proprietary heat treatment (validated per ASTM E466).

Strategic Applications:

Mining Tier 4 Final: Certified for Liebherr T 284 haul trucks (4,000+ HP systems).

Marine Tier III: Approved for MAN 175D marine propulsion retrofits.

Oilfield Operations: Validated for continuous duty in 5,000 HP fracking pumps.

Metallurgical Architecture

Layer Material Process Key Property

Core SAE 8620H Vacuum carburizing 1,300 MPa tensile strength

Surface Case-hardened Ion nitriding 62-64 HRC surface hardness

Coating Zinc-nickel Electroplating 2,000 hr salt spray resistance

Precision Dimensions

Parameter Specification Tolerance Standard

Pitch Diameter 125.000 mm ±0.015 mm DIN 3962

Tooth Profile 20° pressure angle ±0.25° ISO 53

Surface Finish Ra 0.3 μm <0.4 μm ASME B46.1

Test Parameter Cummins 3646065 Aftermarket A Industry Standard

Wear Rate 0.003mm/1k hr 0.025mm 0.012mm

Installation Cycles 75+ 20 40

Noise Level 78 dB(A) 85 dB(A) 82 dB(A)

Economic Benefits:

$32,500/engine savings in prevented crankshaft damage

68% reduction in unplanned downtime vs. competitors

Cummins PowerFit™ Protocol

1. Surface Preparation:

 Laser cleaning to Sa 2.5 (ISO 8501-1)

3D profilometry verification (<3μm deviation)

2. Thermal Conditioning:

Heat hub to 110°C ±5°C (induction heater P/N 5592370)

Chill gear to -18°C (cryogenic treatment)

3. Precision Assembly:

Hydraulic press installation (15 kN ±2%)

Real-time strain monitoring (HBM 1-LY11-3/350)

4. Post-Install Verification:

Laser alignment check (<0.01mm TIR)

Ultrasonic wall thickness measurement

Predictive Maintenance

Oil Debris Monitoring: Replace at 20 ppm iron particle count (ISO 4406)

Vibration Threshold: Alert at >4g acceleration (2× harmonic frequency)