High-Precision Crusher Gear for Single-Cylinder Cone Crushers
Engineered by NMS – Power Transmission Perfected
Critical ComponentEccentric Drive Gear Assembly
Compatible with Metso HP/GP, Sandvik CH/CS Series & Equivalent Crushers
Precision Engineering Excellence
► Advanced Metallurgy
Material: Case-Hardened 20CrNiMo (DIN EN 10084)
Core Toughness: 320-380 HB | Surface Hardness: 58-62 HRC
Carburizing Depth: 1.8-2.2 mm (optimized for impact-peeling resistance)
► Zero-Defect Tooth Profile
6-stage CNC grinding (profile + lead + pitch)
AGMA 13 accuracy (superior to industry-standard AGMA 9)
Crowning optimization minimizes edge loading
► Vibration Control
Helical teeth: 25° helix angle ±0.05°
Dynamic balancing: G2.5 grade at 1,200 RPM
Performance Validation
| Parameter | NMS Gear | Standard Gear |
|---|---|---|
| Surface Durability | 2,200 MPa | 1,500 MPa |
| Bending Strength | 850 MPa | 550 MPa |
| Noise Level | <78 dB(A) | 85-92 dB(A) |
| Micropitting Risk | ISO 6336-22:2018 Level 1 | Level 3 |
Operational Advantages
▣ 60,000-Hour Service Life
Validated in Australian iron ore operations (24/7, >550 t/h throughput)
▣ 35% Faster Installation
Keyless hydraulic-fit hub design
Laser-etched timing marks eliminate alignment errors
▣ Energy Efficiency
Ultra-polished flank surface (Ra ≤0.4μm) reduces power loss by 9%
Engineering Integrity
Residual Stress Control: -550 to -650 MPa compressive stress (XRD verified)
Thermal Stability: Differential tempering prevents distortion at 120°C
Failure Prevention:
▪ Tooth breakage ▪ Micropitting ▪ Scuffing wear ▪ Vibration-induced fatigue
Application Scenarios
High-torque startup conditions (>2.5X nominal torque)
Desert environments with diurnal 40°C temperature swings
Taconite processing with continuous tramp iron exposure
NMS Dedication to Drive System Reliability
Synergizes with NMS eccentric bushings and top shells for complete motion system integrity.