Diesel Engine Parts Crankshaft Part Construction Machinery 3646342

Engineered for ultra-class mining and power generation equipment, this counterweight delivers:

Vibration Reduction: Limits crankshaft torsional vibration to <0.15° peak-to-peak at 2,100 RPM (ISO 10816-6 compliant)

Fatigue Life Extension: Increases crankshaft service life by 32% compared to standard counterweights (Cummins field study 2023)

Thermal Stability: Maintains balance within 0.5g·cm from -40°C to +200°C operating range

Proven Applications:

980+ HP Systems: Validated for Komatsu 980E-5 electric drive haul trucks

Marine Propulsion: Approved for Wärtsilä 32 retrofit packages

Hybrid Power: Compatible with GE Power Conversion battery-assisted generators

Metallurgical Composition

Base Material: Vacuum arc remelted (VAR) SAE 4340 steel with:

Ultimate Tensile Strength: 1,250 MPa (181 ksi)

Charpy V-Notch: 45J @ -40°C

Surface Enhancement:

Plasma Electrolytic Oxidation: 50μm ceramic layer with 1,800 HV hardness

Residual Stress Optimization: Shot peened to -650 MPa compressive stress

Precision Dimensions

Parameter  Specification Tolerance  Standard 

Mass  22.5 kg  ±0.1% ASTM E617 

Bore Concentricity  0.015 mm  <0.02 mm  ASME Y14.5 

Bolt Circle Runout  0.03 mm  ±0.01 mm  DIN 7172 

Performance Benchmark

Test Parameter Cummins 3646342  Aftermarket A  OEM Standard 

Balance Accuracy  0.5g·cm  2.3g·cm 1.8g·cm 

Corrosion Resistance  1,500 hrs  400 hrs  800 hrs 

Installation Cycles  50+  12  30 

Economic Benefits:

$28,500/engine savings in prevented crankshaft replacements

73% lower warranty claims vs. industry average

Cummins BalanceTrak™ Protocol

1. Thermal Conditioning:

Heat counterweight to 95°C ±3°C (induction heater P/N 5592351)

Chill crankshaft to -18°C (cryogenic chamber)

2. Interference Fit Assembly:

Target press force: 18-22 tonnes (Enerpac RR-18000 system)

Real-time strain monitoring via embedded sensors

3. Post-Install Verification:

Laser vibrometer balance check (B&K 4535-B-001)

Ultrasonic bolt tension verification

Predictive Maintenance

VCM Pro™ System: Wireless vibration sensors monitor imbalance trends

Rejection Criteria:

Mass loss >0.3%

Surface pitting >1mm depth