The PU spider coupling is an elastomeric component—commonly called a “spider”—shaped like a flower, installed between two drive hubs to transmit torque while damping shocks and compensating for misalignment. Constructed from high-performance polyurethane, our spider couplings excel in wear resistance and impact absorption, making them ideal for medium to high-torque industrial drive systems.
Wear & Chemical Resistance: PU resists abrasion, oils, and chemicals, with a stable operating temperature range from –40 °C to +100 °C.
Effective Shock & Vibration Damping: PU’s elastomeric properties protect motors, gearboxes, and connected components.
Quieter Operation: The soft elastomer reduces noise and prevents harsh metal-to-metal contact between hubs.
Fail-Safe Design: In the event the spider becomes damaged or worn, the hub jaws can still transmit torque—albeit at reduced efficiency—to prevent system failure.
Easy Assembly & Maintenance: Simple flower-shaped design allows for easy installation and removal without hub or shaft realignment.
Ideal for connecting motors, pumps, gearboxes, conveyors, and rotary machines—especially in environments requiring shock absorption and chemical resistance. Suitable for systems with frequent start-stop or reversed operations, and those experiencing torque fluctuations.
| Attribute | Typical Values |
|---|---|
| Material | Polyurethane all‑elastomer, hardness 90–95 Shore A |
| Operating Temperature | –40 °C to +100 °C |
| Torque Capacity | From ~22 Nm up to >2,500 Nm (depending on size) |
| Misalignment Compensation | Axial, parallel, angular; excellent vibration reduction |
| Electrical Insulation | Non‑conductive PU provides electrical isolation |
| Installation & Maintenance | Blind-fit assembly; easy swap of spiders |
Selection Criteria: Determine torque requirements, shaft misalignments, environmental conditions (chemicals, oils, temperature), and choose PU with appropriate Shore hardness (higher Shore = higher torque capacity but less damping).
Maintenance Recommendations: Inspect regularly—replace spider if lobe wear exceeds ~25%; rotate lobes or install the reverse side to extend service life. Maintain proper clearance to avoid hub contact.
Premium Raw Materials: Imported PU elastomer meets international standards for chemical resistance, impact, and thermal stability.
Precision Manufacturing: Accurate spider geometry ensures perfect hub fit, dynamic balance, and noiseless operation.
Custom & Standard Sizes: Available in stock dimensions and bespoke configurations for various shaft diameters and torque demands.
Comprehensive Support: Technical consultation, bespoke design, prompt delivery, and reliable after-sales service.
✅ Conclusion:
The PU spider coupling is a vital component for ensuring smooth, durable, and quiet operation in industrial drive systems. Combining high wear resistance, vibration damping, and easy maintenance, our PU spider is an exceptional, low-maintenance choice for modern industrial applications.
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