DFC Aluminum Curved Jaw Coupling – Zero Backlash, Ball Screw Coupler, Stepper Motor

Factory direct | High-strength aluminum alloy | Zero backlash | Urethane spider | Oil, dirt & moisture resistant | Detachable design | Clamping screw fastening

The Apexcoupling DFC series is a precision aluminum curved jaw coupling (also known as a spider coupling or jaw coupling) designed for high-performance power transmission in precision motion control applications. Featuring zero rotational clearance, it is ideal for stepper motors, ball screw drives, and printing machinery where accurate positioning and smooth operation are critical. Constructed from high-strength aluminum alloy with a urethane spider element, this coupling offers excellent wear resistance, damping characteristics, and compensation for radial, angular, and axial misalignment.

✅ Zero backlash design – suitable for stepper motors, ball screw couplers, and precision automation.

Key Technical Specifications

🔧 Custom bores, spider hardness, and anodizing colors available. Contact us with your specifications.

Product Features & Advantages

Product Structure

1. Two Aluminum Hubs – High-strength aluminum alloy, precision-machined with curved jaws.

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

3. Clamping Screws – Secure fastening to shafts.

💡 The curved jaw profile ensures a press-fit with the spider, eliminating backlash and providing smooth, precise torque transmission – critical for stepper motor and ball screw applications.

Applications

• Stepper Motors – Precision motion control, zero backlash requirement

• Ball Screw Drives – Accurate linear positioning

• Printing Shops – Printing presses, finishing equipment

• CNC Equipment – High-accuracy machining, positioning

• Robotics – Precise motion control, low backlash

• Packaging Machinery – Reliable, maintenance-friendly drives

• Food & Beverage Processing – With appropriate spider material

• Construction Machinery – Light to medium-duty connections

• Energy & Mining – Conveyors, feeders, light drives

• General Industrial Machinery – Pumps, mixers, fans

• Building Material Shops – Material handling equipment

Why Choose Apex Coupling for DFC Curved Jaw Couplings?

FAQ

Q: What is a curved jaw coupling?
A: A curved jaw coupling (also called a spider coupling or jaw coupling) consists of two aluminum hubs with curved jaws and a urethane spider element. The curved jaw profile ensures zero backlash operation.

Q: What does “zero backlash” mean?
A: Zero backlash means there is no rotational clearance between the hubs and the spider. This ensures precise torque transmission with no lost motion – critical for stepper motors, ball screw drives, and CNC machines.

Q: What is the standard bore size?
A: The standard bore shown is 10 mm. Custom bores are available on request.

Q: What is the maximum speed?
A: Maximum speed is 1000 RPM for this model. Higher speed ratings available for other models.

Q: What spider materials are available?
A: Standard is urethane (polyurethane elastomer) – resistant to oil, dirt, sand, grease, moisture, solvents, and ozone. Different hardness levels available for specific damping and torque requirements.

Q: Can the coupling compensate for misalignment?
A: Yes. The urethane spider compensates for radial, angular, and axial deviations.

Q: Is the coupling easy to install?
A: Yes. The detachable design allows for easy installation and maintenance without moving connected shafts.

Q: Can I get custom anodizing?
A: Yes. Anodizing is optional – choose your color for enhanced corrosion resistance and appearance.

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.