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DFC Series Aluminum Curved Jaw Coupling – Zero Backlash, High Precision, 5mm to 8mm Bore
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 Precision, OEM Customizable
Factory direct | High-strength aluminum alloy | Zero backlash | 300 N·m torque | 2000 RPM | Urethane spider | Detachable design
The Apexcoupling DFC series is a precision curved jaw coupling (also known as a spider coupling or jaw coupling) designed for high-performance power transmission. Featuring zero rotational clearance, it is ideal for applications requiring positive and negative rotation with absolute precision. 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 servo motors, CNC equipment, and precision automation.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Apexcoupling |
| Model Series | DFC (Curved Jaw Coupling) |
| Type | Flexible / Elastomeric / Jaw |
| Structure | Curved jaw (spider type) |
| Body Material | High-strength aluminum alloy |
| Spider Material | Urethane (polyurethane elastomer) – oil, dirt, sand, grease, moisture, and ozone resistant |
| Bore Diameter | 5 mm to 8 mm (standard) – custom sizes available |
| Rated Torque | 300 N·m |
| Maximum Speed | 2000 RPM |
| Backlash | Zero (zero rotational clearance) |
| Misalignment Compensation | Radial, angular, and axial deviations |
| Fastening Method | Clamping screw (set screw) |
| Design | Detachable – easy installation and maintenance |
| Surface Treatment | Anodizing (optional) |
| Standard or Nonstandard | Standard with OEM/ODM/OBM support |
| Customized support | OEM, ODM, OBM |
| Applicable Industries | Machinery repair shops, manufacturing plants, construction machinery, general industry |
| Certification | ISO9001, BV Certificate |
| Warranty | 1 Year |
| Place of Origin | Guangdong, China |
🔧 Custom bores, spider hardness, anodizing colors, and special sizes available. Contact us with your specifications.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| Zero Rotational Clearance | No backlash – ideal for positive and negative rotation applications |
| High-Strength Aluminum Alloy | Lightweight, corrosion-resistant, high strength-to-weight ratio |
| Urethane Spider Element | Excellent abrasion resistance, elasticity, and damping characteristics |
| Oil, Dirt & Moisture Resistant | Withstands harsh environments – resistant to oil, sand, grease, moisture, and ozone |
| Misalignment Compensation | Compensates for radial, angular, and axial deviations – protects connected equipment |
| Detachable Design | Easy installation and maintenance – no need to move connected shafts |
| Clamping Screw Fastening | Secure shaft locking, easy adjustment |
| Anodizing Optional | Enhanced corrosion resistance and aesthetic finish |
| High Torque Capacity | 300 N·m – suitable for medium-duty industrial applications |
| OEM/ODM/OBM Support | Custom bores, materials, colors, and branding available |
Product Structure
Two Aluminum Hubs – High-strength aluminum alloy, precision-machined with curved jaws.
Urethane Spider Element – The elastic insert that transmits torque, absorbs shock, and compensates for misalignment.
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.
Applications
Servo Motors – Precision positioning, zero backlash requirement
CNC Equipment – High-accuracy machining, reversible rotation
Robotics – Precise motion control, low backlash
Packaging Machinery – Reliable, maintenance-friendly drives
Printing Equipment – Smooth, high-speed operation
Construction Machinery – Durable, shock-absorbing connections
Food & Beverage Processing – With appropriate spider material
General Industrial Machinery – Pumps, conveyors, mixers, fans
Automation Equipment – Pick-and-place, indexing tables
Why Choose Apex Coupling for DFC Curved Jaw Couplings?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Zero Backlash Design | Precision performance for reversible and servo applications |
| Premium Materials | High-strength aluminum alloy + urethane spider |
| Harsh Environment Resistant | Oil, dirt, sand, grease, moisture, and ozone resistant |
| Misalignment Compensation | Protects bearings and seals from misalignment damage |
| Detachable & Easy Maintenance | Quick installation and replacement |
| Customization | Bores, spider hardness, anodizing, and branding – all customizable |
| ISO9001 & BV Certified | Quality assured for international buyers |
| Fast Delivery | Stock for standard sizes; custom orders 7‑10 days |
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 servo motors, CNC machines, and robotics.
Q: What is the standard bore size range?
A: Standard bores range from 5 mm to 8 mm. Custom bores are available on request.
Q: What is the maximum torque and speed?
A: Rated torque is 300 N·m and maximum speed is 2000 RPM. Higher torque and speed ratings available for custom designs.
Q: What spider materials are available?
A: Standard is urethane (polyurethane elastomer) – resistant to oil, dirt, sand, grease, moisture, 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.
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