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DFC Series Aluminum Curved Jaw Coupling – Zero Backlash, High Accuracy, for Linear Modules & Servo Motors
Model Number
Check below, custom
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
DFC Series Aluminum Curved Jaw Coupling – Zero Backlash, High Accuracy, for Linear Modules & Servo Motors
Factory direct | High-strength aluminum alloy | Zero backlash | 2000 N·m torque | 5000 RPM | Urethane spider | Clamping screw design | Anodized finish | OEM customizable
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 demanding industrial applications. Featuring zero rotational clearance, it is ideal for linear modules, servo motors, stepper motors, and construction 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. The clamping screw design ensures secure shaft fixation, while the anodized finish provides enhanced corrosion resistance.
✅ Zero backlash design – suitable for positive and negative rotation, linear modules, and precision automation.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Apexcoupling |
| Model Series | DFC (Curved Jaw Coupling / Spider Coupling) |
| Type | Flexible / Elastomeric / Jaw / Spider |
| Structure | Curved jaw (spider type) |
| Body Material | High-strength aluminum alloy |
| Spider Material | Urethane (polyurethane elastomer) – oil, dirt, sand, grease, moisture, solvents, and ozone resistant |
| Bore Diameter | 30 mm (standard example) – custom sizes available |
| Rated Torque | 2000 N·m |
| Maximum Speed | 5000 RPM |
| Backlash | Zero (zero rotational clearance) |
| Misalignment Compensation | Radial, angular, and axial deviations |
| Vibration Absorption | Yes (urethane spider absorbs shock and vibration) |
| Fastening Method | Clamping screw (set screw) |
| Design | Detachable – easy installation and maintenance |
| Surface Treatment | Anodizing (optional – custom color available) |
| Standard or Nonstandard | Standard with OEM support |
| Customized support | OEM |
| Applicable Industries | Manufacturing plants, construction machinery, linear modules, automation equipment |
| Feature | High accuracy |
| Certification | ISO9001, BV Certificate |
| Warranty | 1 Year |
| Place of Origin | Guangdong, China |
🔧 Custom bores, spider hardness, anodizing colors, and keyway options available. Contact us with your specifications.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| Zero Rotational Clearance | No backlash – ideal for linear modules, servo motors, and precision positioning |
| High-Strength Aluminum Alloy | Lightweight, corrosion-resistant, high strength-to-weight ratio – reduces inertia for faster response |
| Urethane Spider Element | Excellent abrasion resistance, elasticity, and damping characteristics |
| Oil, Dirt & Moisture Resistant | Withstands harsh environments – resistant to oil, sand, grease, solvents, moisture, and ozone |
| Misalignment Compensation | Compensates for radial, angular, and axial deviations – protects bearings and seals |
| Detachable Design | Easy installation and maintenance – no need to move connected shafts |
| Clamping Screw Fastening | Secure shaft locking, even clamping force, easy adjustment |
| Anodized Finish | Enhanced corrosion resistance, improved wear resistance, professional appearance |
| High Accuracy | Precision machining ensures accurate shaft alignment and smooth operation |
| OEM Customization | Custom bores, spider hardness, anodizing colors, and keyways available |
Product Structure
Two Aluminum Hubs – High-strength aluminum alloy, precision-machined with curved jaws, anodized finish.
Urethane Spider Element – The elastic insert that transmits torque, absorbs shock, and compensates for misalignment.
Clamping Screws – Secure fastening to shafts with even clamping force.
💡 The curved jaw profile ensures a press-fit with the spider, eliminating backlash and providing smooth, precise torque transmission. The clamping screw design provides secure shaft fixation without damaging the shaft surface.
Applications
Linear Modules – Precision linear motion systems, zero backlash requirement
Servo Motors – High-precision motion control, accurate positioning
Stepper Motors – Accurate step transmission, no lost motion
Construction Machinery – Reliable power transmission in demanding environments
Manufacturing Plants – General power transmission
CNC Machines – High-accuracy machining, positioning
Robotics – Precise motion control, low backlash
Packaging Machinery – Reliable, maintenance-friendly drives
3D Printers – Lightweight, precise shaft connections
Why Choose Apex Coupling for DFC Curved Jaw Couplings?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Zero Backlash Design | Precision performance for linear modules, servo motors, and automation |
| Premium Aluminum Alloy | Lightweight, corrosion-resistant, high strength-to-weight ratio |
| Urethane Spider | Oil, dirt, sand, grease, moisture, solvents, and ozone resistant |
| Clamping Screw Fastening | Secure shaft fixation, even clamping force |
| Anodized Finish | Enhanced corrosion resistance and professional appearance |
| Misalignment Compensation | Protects bearings and seals from misalignment damage |
| Detachable & Easy Maintenance | Quick installation and replacement |
| OEM Customization | Custom bores, spider hardness, anodizing colors, and keyways |
| ISO9001 & BV Certified | Quality assured for international buyers |
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 linear modules, servo motors, and CNC machines.
Q: What is the standard bore size?
A: The standard bore shown is 30 mm. Custom bores are available on request.
Q: What is the torque and speed rating?
A: Rated torque is 2000 N·m and maximum speed is 5000 RPM.
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.
Q: What is the clamping screw design?
A: The clamping screw design uses tightening screws to compress the hub onto the shaft, providing secure fixation with even clamping force and no shaft damage.
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.
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