High-Torque Stability: XL Series Star-Shaped Elastic & DJ-A Jaw Couplings

The XL Series Star-Shaped Elastic Coupling and DJ-A Jaw Coupling represent the industry standard for reliable, vibration-dampening power transmission. Machined from high-grade, impurity-free 45# solid round steel and finished with a premium anti-rust blackening treatment, these couplings are engineered to handle aggressive industrial torque loads. Equipped with a clamp screw  fastening structure and a high-performance polyurethane elastic insert, they ensure zero-backlash torque transfer and extensive protection for connected pump and motor shafts.

Core Product Advantages

• Solid 45# Round Steel Hubs: Forged from premium-grade steel completely free of sand holes or impurities, delivering higher structural density, greater stability, and massive torque capacity compared to standard cast iron.

• Friction-Locked Clamp Fastening: The clamp-style hub provides a powerful, multi-surface friction grip around the shaft, preventing slipping and eliminating shaft damage while simplifying installation.

• H7 Precision Standard Bore: All inner diameter tolerances are strictly held within H7 precision limits, ensuring absolute concentricity and tight locking power to mitigate shaft runout.

• Polyurethane Shock Damping Pad: Features an optimized star-shaped PU insert that effectively absorbs torsional shocks, dampens mechanical vibrations, and minimizes long-term bearing wear.

• Excellent Industrial Resilience: The combination of chemically blackened steel and oil-resistant polyurethane makes these units ideal for harsh, humid environments like industrial pump rooms.

• Comprehensive Custom Support: Large stock of standard sizes available for immediate dispatch. We offer complete OEM/ODM customization for custom bores, non-standard keyways, and specific overall lengths.

Technical Specifications Table