DJ-A 45# Steel Jaw/Spider Coupling – High Torque, Shock Absorption, OEM Customizable

Factory direct | 45# steel | Black oxide finish | 125–16,000 N·m torque | 3,800–1,000 RPM | PU rubber spider | Jaw/spider design

The Apexcoupling DJ-A series is a 45# steel jaw/spider flexible coupling (also known as a star elastic coupling or curved jaw coupling) designed for reliable power transmission in demanding industrial applications. Featuring a jaw-and-spider hybrid structure, it combines the torsional rigidity of steel with the flexibility and shock absorption of an elastomeric spider. Constructed from high-strength 45# steel with a black oxide finish for corrosion resistance, and equipped with a PU rubber spider element, this coupling delivers exceptional performance in metallurgy, mining, petroleum, chemical, hoisting, transportation, light industry, textile, pumps, and fans.

✅ Simple structure, small radial size, no lubrication required, high load capacity, easy maintenance.

Key Technical Specifications

🔧 Custom bores, keyways, spider hardness, and special materials available. Contact us with your specifications.

Product Features & Advantages

Product Structure

1. Two 45# Steel Hubs – High-strength carbon steel, precision-machined with curved jaws, black oxide finish.

2. PU Rubber Spider Element – The elastic insert that transmits torque, absorbs shock, and compensates for misalignment.

3. Clamping or Set Screw Fastening – Secure shaft connection (configuration varies by model).

💡 The jaw-and-spider hybrid structure provides the perfect balance of torsional rigidity for torque transmission and flexibility for shock absorption and misalignment compensation.

Technical Data

Applications

• Metallurgical Equipment – Rolling mills, continuous casting lines

• Mining Machinery – Crushers, conveyors, feeders

• Petroleum & Chemical Equipment – Pumps, compressors, mixers

• Hoisting & Transportation Equipment – Cranes, conveyors, elevators

• Light Industry & Textile Machinery – Spinning, weaving, finishing equipment

• Pumps – Centrifugal, gear, screw, and diaphragm pumps

• Fans & Blowers – Industrial ventilation, air handling

• Construction Machinery – Medium to heavy-duty drives

• Food & Beverage Processing – With appropriate spider material

• General Industrial Machinery – Medium to high-speed drives

Why Choose Apex Coupling for DJ-A Jaw/Spider Couplings?

FAQ

Q: What is a jaw/spider coupling?
A: A jaw/spider coupling (also called a star elastic coupling or curved jaw coupling) consists of two metal hubs with curved jaws and an elastomeric spider element. The curved jaw profile ensures zero backlash operation.

Q: What material is used for the hubs?
A: The DJ-A series uses 45# high-strength carbon steel – offering high hardness, high torque capacity, and reliable quality.

Q: What is the spider made of?
A: The spider is made of PU rubber (polyurethane elastomer) – offering excellent shock absorption, vibration damping, wear resistance, and oil resistance.

Q: What is the surface treatment?
A: Standard surface treatment is black oxide (blackening) for corrosion resistance.

Q: What is the torque range?
A: The DJ-A series covers 125 – 16,000 N·m.

Q: What is the speed range?
A: Speed range is 3,800 – 1,000 RPM, varying by model size.

Q: What is the operating temperature range?
A: -35°C to 80°C.

Q: Does the coupling require lubrication?
A: No. The DJ-A series is maintenance-free – no lubrication required.

Q: What misalignment can the coupling compensate for?
A: The PU rubber spider compensates for angular, parallel, and axial deviations.

Q: What are the main applications?
A: Metallurgy, mining, petroleum, chemical, hoisting, transportation, light industry, textile, pumps, fans, and general industrial machinery.

Request a Quote

Send us your bore size, torque, speed, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.