Cast Iron Jaw Coupling Spider Insert for Mining Locomotive and Industrial Drive Systems
jaw coupling is a three-piece flexible shaft coupling engineered to transmit torque while simultaneously absorbing shock, damping torsional vibration, and compensating for shaft misalignment. Consisting of two precision-machined cast iron hubs and a polyurethane spider insert, this coupling ensures smooth power delivery between drive and driven shafts without any metal-to-metal contact. Its fail-safe design allows the hubs to interlock and continue transmitting power even if the elastomeric insert fails, providing operators a crucial window to shut down the system safely. Designed for use in mining locomotive drive trains, industrial pumps, conveyors, and general power transmission equipment, this coupling requires no lubrication and delivers reliable performance in the abrasive, high-vibration conditions of underground and surface industrial operations.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Jaw Coupling / Spider Coupling / Claw Coupling |
| Standard | GB/T 5272-2002 |
| Hub Material | Cast Iron (LM1–LM8) / Ductile Iron (LM9–LM13) |
| Spider Material | Polyurethane (PU) Elastomer |
| Spider Hardness Grades | Shore A (80±5) / Shore B (92±5) / Shore D (60±5) |
| Nominal Torque Range | 16 – 8,000 N·m |
| Maximum Bore Diameter | Up to 160 mm |
| Angular Misalignment | ≤ 2° |
| Radial Misalignment | 0.5 – 1.8 mm (size dependent) |
| Axial Float | 1.2 – 5.0 mm (size dependent) |
| Operating Temperature | -35°C to +80°C |
| Lubrication | Not Required |
| Electrical Isolation | Non-conductive spider provides shaft isolation |
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