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DFC Aluminum Jaw/Spider Coupling – Maintenance-Free, Torsional Flexible, ROTEX Type
Model Number
Check below, custom
D14-L22-Bore(3~0
D20-L25-Bore(3~10)
D20-L30-Bore(3~10)
D25-L30-Bore(4~14)
D25-L34-Bore(4~14)
D30-L35-Bore(5~16)
D30-L40-Bore(5~16)
D35-L32-Bore(5~18)
D35-L50-Bore(5~19)
D40-L50-Bore(6~24)
D40-L55-Bore(6~24)
D40-L66-Bore(6~24)
D45-L55-Bore(8~25)
D45-L66-Bore(8~25)
D50-L55-Bore(8~25)
D55-L49-Bore(12~32)
D55-L78-Bore(12~32)
D65-L80-Bore(14~40)
D65-L90-Bore(14~40)
D80-L114-Bore(14~45)
D95-L126-Bore(14~45)
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
DFC Aluminum Jaw/Spider Coupling – Maintenance-Free, Torsional Flexible, ROTEX Type
Factory direct | High-strength aluminum alloy | Maintenance-free | 2000 N·m torque | 5000 RPM | Zero backlash | PU spider | OEM/ODM/OBM
The Apexcoupling DFC series is a maintenance-free, torsional flexible jaw/spider coupling (ROTEX type) designed for reliable power transmission in a wide range of industrial applications. Featuring a three-piece construction – two lightweight aluminum alloy hubs and a polyurethane spider element – this coupling offers excellent vibration damping, misalignment compensation, and zero backlash performance. The maintenance-free design eliminates the need for lubrication, reducing operating costs and downtime.
✅ Maintenance-free operation – no lubrication required. Simple three-piece construction for easy installation and spider replacement.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Apexcoupling |
| Model Series | DFC (Aluminum Jaw/Spider Coupling – ROTEX Type) |
| Type | Flexible / Elastomeric / Jaw / Spider |
| Structure | Jaw/Spider (curved jaw) |
| Body Material | High-strength aluminum alloy |
| Spider Material | Polyurethane (PU) elastomer – wear-resistant, oil-resistant, electrically insulating |
| Surface Treatment | Anodizing (optional) |
| Bore Diameter | 4 mm – 38 mm (customizable) |
| Outer Diameter | 20 mm – 65 mm |
| Length | 25 mm – 90 mm |
| Rated Torque | Up to 2000 N·m |
| Maximum Speed | Up to 5000 RPM |
| Backlash | Zero (zero rotational clearance) |
| Misalignment Compensation | Radial, angular, and axial deviations |
| Vibration Absorption | Yes (PU spider absorbs shock and vibration) |
| Lubrication | None required – maintenance-free |
| Operating Temperature | -20°C to 80°C (standard) |
| Customized support | OEM, ODM, OBM |
| Applicable Industries | Manufacturing plants, machinery repair shops, retail, general industry |
| Certification | ISO9001, BV Certificate |
| Warranty | 1 Year |
| Place of Origin | Guangdong, China |
🔧 Custom bores, keyways, spider hardness (durometer), and anodizing colors available. Contact us with your specifications.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| Maintenance-Free Design | No lubrication required – reduces operating costs and eliminates maintenance schedules |
| High-Strength Aluminum Alloy | Lightweight, corrosion-resistant, high strength-to-weight ratio – ideal for high-speed applications |
| Polyurethane Spider Element | Excellent wear resistance, oil resistance, electrical insulation, and vibration absorption |
| Zero Backlash | No rotational clearance – suitable for positive and negative rotation applications |
| Torsional Flexibility | Absorbs shock loads and torsional vibration – protects connected equipment |
| Misalignment Compensation | Compensates for radial, angular, and axial deviations – extends bearing and seal life |
| Three-Piece Construction | Simple design – easy installation and spider replacement without moving hubs |
| Wide Size Range | Bore 4–38 mm, OD 20–65 mm, length 25–90 mm – covers most industrial applications |
| High Speed Capability | Up to 5000 RPM – suitable for high-speed machinery |
| High Torque Capacity | Up to 2000 N·m – handles heavy loads |
| ROTEX Compatible Design | Interchangeable with industry-standard ROTEX couplings |
| OEM/ODM/OBM Support | Custom bores, spider hardness, anodizing, and branding available |
Product Structure
Two Aluminum Hubs – High-strength aluminum alloy, precision-machined with curved jaws, lightweight design.
Polyurethane Spider Element – The elastic insert that transmits torque, absorbs shock, and compensates for misalignment.
Clamping or Set Screw Fastening – Secure shaft connection (configuration varies by model).
💡 The curved jaw profile ensures a press-fit with the spider, eliminating backlash and providing smooth, precise torque transmission. The three-piece construction allows for quick spider replacement without moving the hubs.
Technical Data
| Parameter | Value |
|---|---|
| Material | Aluminum Alloy (hubs) + Polyurethane (spider) |
| Bore Range | 4 – 38 mm |
| Outer Diameter Range | 20 – 65 mm |
| Length Range | 25 – 90 mm |
| Torque Capacity | Up to 2000 N·m |
| Speed Capacity | Up to 5000 RPM |
| Operating Temperature | -20°C ~ 80°C |
| Backlash | Zero |
| Lubrication | None Required |
Applications
Manufacturing Plants – General power transmission
Machinery Repair Shops – Replacement and upgrade parts
Pumps – Centrifugal, gear, screw, and diaphragm pumps
Fans & Blowers – Industrial ventilation, air handling
Conveyors – Material handling systems
Mixers & Agitators – Chemical and food processing
Textile Machinery – Spinning, weaving, finishing equipment
Packaging Machinery – Reliable, maintenance-friendly drives
Printing Equipment – Smooth, high-speed operation
CNC Machines – Precision motion control
Servo Motors & Stepper Motors – Zero backlash for precise positioning
General Industrial Machinery – Medium to high-speed drives
Why Choose Apex Coupling for DFC Aluminum Jaw Couplings?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Premium Aluminum Alloy | Lightweight, corrosion-resistant, high strength-to-weight ratio |
| Maintenance-Free | No lubrication required – reduces operating costs |
| Zero Backlash | Precision performance for reversible and servo applications |
| Torsional Flexibility | Absorbs shock and vibration – protects connected equipment |
| Misalignment Compensation | Extends bearing and seal life |
| ROTEX Compatible | Interchangeable with industry-standard ROTEX couplings |
| Wide Size Range | Bore 4–38 mm – covers most industrial needs |
| Customization | Bores, spider hardness, anodizing, and branding – all customizable |
| ISO9001 & BV Certified | Quality assured for international buyers |
FAQ
Q: What is a jaw/spider coupling?
A: A jaw/spider coupling (also called a spider 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 does “maintenance-free” mean?
A: The DFC series requires no lubrication – the polyurethane spider is self-lubricating and does not need grease or oil. This reduces maintenance costs and eliminates lubrication schedules.
Q: What material is used for the hubs?
A: The DFC series uses high-strength aluminum alloy – lightweight, corrosion-resistant, and ideal for high-speed applications.
Q: What is the spider made of?
A: The spider is made of polyurethane (PU) elastomer – offering excellent wear resistance, oil resistance, electrical insulation, and vibration absorption.
Q: What is the torque and speed range?
A: Rated torque up to 2000 N·m and maximum speed up to 5000 RPM. Specific ratings vary by model size.
Q: What is the bore size range?
A: Standard bore range is 4 mm to 38 mm. Custom bores available on request.
Q: Does the coupling have backlash?
A: No. The DFC series features zero backlash – no rotational clearance, suitable for positive and negative rotation.
Q: Can the coupling compensate for misalignment?
A: Yes. The polyurethane spider compensates for radial, angular, and axial deviations.
Q: Is this coupling compatible with ROTEX couplings?
A: Yes. The DFC series is designed to be interchangeable with industry-standard ROTEX couplings.
Q: Can I get a custom coupling?
A: Yes. We offer OEM, ODM, and OBM support – custom bores, spider hardness, anodizing, and branding available.
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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