Heavy-Load Synchronization: DJ-B Series Pre-Stressed Star Elastic Couplings

The DJ-B Series Enlarged Bore Star-Shaped Elastic Coupling is the heavy-duty engineer’s answer to intense torsional stress and frequent reversing cycles. Unlike standard couplings that struggle with oversized shafts, the DJ-B series features an optimized enlarged hub profile, allowing it to grip larger shaft diameters securely without increasing the product’s overall outer radius. Capable of transferring massive torque ranges from 15 up to 235,000 N.m, this series establishes a pre-stressed, zero-backlash connection ideal for main spindle drives, automated hoisting machinery, and heavy industrial gearboxes operating in harsh conditions.

Core Product Advantages

• Massive Torque Capacity (15–235,000 N.m): From compact stepper applications to massive industrial drivetrains, the structural geometry provides high power density across a wide selection framework.

• Pre-Stressed Zero-Backlash Joining: The tight compression fit between the solid steel jaws and the polyurethane spider guarantees crisp mechanical alignment with absolutely zero play during rapid clockwise/counter-clockwise shifts.

• Premium 45# Impurity-Free Steel: Sculpted from solid 45# round carbon steel entirely free of sand holes or casting voids, offering supreme structural integrity, uniform density, and exceptional resistance to deformation under high peak loads.

• H7 Precision Bore Turning: Internal shaft openings are CNC-machined within an H7 tolerance limit, ensuring absolute concentricity and a vibration-dampening, rigid shaft lock.

• Broad Temperature Resilience (-35°C to 80°C): The premium-formulated polyurethane element maintains its elasticity, shock absorption, and mechanical memory across freezing outdoor conditions and hot machinery enclosures.

• Low Rotational Inertia Layout: Despite its massive torque handling capability, the enlarged bore configuration minimizes unnecessary outer housing metal, keeping the component lightweight and responsive.

• Lubrication-Free & Maintenance-Easy: The advanced solid-state flexible engineering removes the need for routine greasing, cutting down overall aftermarket maintenance and warranty costs.

Technical Specifications Table