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DFCG Stainless Steel Spider Coupling – Zero Backlash, Clamping Type, 304SS, H7 Bore
Model Number
Check below, custom
DFCG
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
DFCG Stainless Steel Spider Coupling – Zero Backlash, Clamping Type, 304SS, H7 Bore
Factory direct | SUS304 stainless steel | Zero backlash | H7 bore precision | German polyurethane spider | 12.9 grade screws | Clamping type
The Apexcoupling DFCG series is a stainless steel spider coupling (curved jaw / clamping type) designed for precision power transmission in demanding environments. Featuring zero rotational clearance, it is ideal for applications requiring positive and negative rotation with absolute precision. Constructed from SUS304 stainless steel with a German polyurethane elastomer spider, this coupling offers excellent corrosion resistance, wear resistance, oil resistance, and electrical insulation. The clamping screw design ensures secure shaft fastening, while the detachable construction allows for easy installation and maintenance.
✅ Zero backlash design – suitable for servo motors, stepper motors, and precision automation.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Apexcoupling |
| Model Series | DFCG (Stainless Steel Spider Coupling – Clamping Type) |
| Type | Flexible / Elastomeric / Spider / Curved Jaw |
| Body Material | SUS304 stainless steel (high-quality stainless steel) |
| Spider Material | German imported polyurethane (polyurethane elastomer) – wear-resistant, oil-resistant, electrically insulating |
| Surface Treatment | Polished (standard); anodizing optional |
| Bore Diameter | Customizable (standard sizes available) |
| Bore Tolerance | H7 (precision fit) |
| Screws | 12.9 grade high-strength screws – smooth, burr-free, no loosening |
| Fastening Method | Clamping screw type |
| Backlash | Zero (zero rotational clearance) |
| Misalignment Compensation | Radial, angular, and axial deviations |
| Vibration Absorption | Yes (polyurethane spider absorbs vibration) |
| Operating Temperature | -35°C to 80°C |
| Design | Detachable – easy installation and maintenance |
| Customized support | OEM, ODM, OBM |
| Applicable Industries | CNC machine tools, food packaging machinery, metallurgical equipment, photovoltaic, woodworking, chemical, semiconductor, food machinery, printing, railway tracks |
| Certification | ISO9001, BV Certificate |
| Warranty | 1 Year |
| Place of Origin | Guangdong, China |
🔧 Custom bores, spider hardness, and special sizes available. Large semi-finished stock for fast delivery. Contact us with your specifications.
Product Features & Advantages
| Advantage | Benefit |
|---|---|
| Zero Rotational Clearance | No backlash – ideal for positive and negative rotation applications |
| SUS304 Stainless Steel | Excellent corrosion resistance, high strength, durability, and hygienic properties |
| German Imported Polyurethane Spider | Exceptional wear resistance, oil resistance, electrical insulation, vibration absorption |
| H7 Precision Bore | High concentricity, accurate shaft fit, reduces vibration |
| 12.9 Grade Screws | High-strength, smooth, burr-free, no loosening under vibration |
| Clamping Screw Fastening | Secure shaft locking, even clamping force, easy adjustment |
| Misalignment Compensation | Compensates for radial, angular, and axial deviations – protects connected equipment |
| Vibration Damping | Polyurethane spider absorbs shocks and vibration |
| Wide Temperature Range | -35°C to 80°C – suitable for various environments |
| Detachable Design | Easy installation and maintenance – no need to move connected shafts |
| Corrosion Resistant | 304SS withstands moisture, chemicals, and harsh environments |
| Large Semi-Finished Stock | Fast delivery for standard and custom orders |
Product Structure
Two Stainless Steel Hubs – SUS304 stainless steel, precision-machined with curved jaws.
Polyurethane Spider Element – German imported polyurethane elastomer that transmits torque, absorbs shock, and compensates for misalignment.
12.9 Grade Clamping Screws – High-strength screws for secure shaft fastening.
💡 The curved jaw profile ensures a press-fit with the spider, eliminating backlash and providing smooth, precise torque transmission.
Technical Data
| Parameter | Value |
|---|---|
| Material | SUS304 Stainless Steel |
| Surface Treatment | Polished |
| Bore Tolerance | H7 |
| Screw Grade | 12.9 |
| Spider Material | German Polyurethane |
| Operating Temperature | -35°C ~ 80°C |
| Backlash | Zero |
| Fastening Method | Clamping Screw |
Applications
CNC Machine Tools – Spindle drives, feed axes, high-precision positioning
Servo Motors & Stepper Motors – Precision motion control, zero backlash requirement
Food Packaging Machinery – Corrosion-resistant, hygienic design
Metallurgical Equipment – Durable, high-strength connections
Photovoltaic/Solar Equipment – Reliable power transmission in outdoor environments
Woodworking Machinery – Precision and durability
Chemical Industry – 304SS corrosion resistance for aggressive environments
Semiconductor Equipment – Clean room compatible, precision positioning
Food Machinery – Stainless steel hygienic design
Printing Machinery – Smooth, high-speed operation
Railway Tracks & Equipment – Durable, vibration-resistant connections
Why Choose Apex Coupling for DFCG Stainless Steel Spider Couplings?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Premium Stainless Steel | SUS304 – excellent corrosion resistance, high strength, durability |
| German Polyurethane Spider | Superior wear resistance, oil resistance, electrical insulation, vibration absorption |
| Zero Backlash Design | Precision performance for reversible and servo applications |
| H7 Precision Bore | High concentricity, accurate shaft fit |
| 12.9 Grade Screws | Secure fastening, no loosening under vibration |
| Detachable & Easy Maintenance | Quick installation and replacement |
| Wide Temperature Range | -35°C to 80°C – suitable for various environments |
| Large Semi-Finished Stock | Fast delivery for standard and custom orders |
| Customization | Bores, spider hardness, surface treatment – all customizable |
| ISO9001 & BV Certified | Quality assured for international buyers |
FAQ
Q: What is a spider coupling?
A: A spider coupling (also called a jaw 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 is the difference between DFC and DFCG?
A: DFC uses high-strength aluminum alloy hubs. DFCG uses SUS304 stainless steel hubs – providing superior corrosion resistance for harsh environments.
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 material is the spider made of?
A: The spider is made of German imported polyurethane – offering excellent wear resistance, oil resistance, electrical insulation, and vibration absorption.
Q: What is the bore tolerance?
A: Standard bore tolerance is H7 for precision shaft fit and high concentricity.
Q: What grade are the screws?
A: The clamping screws are 12.9 grade – high-strength, smooth, burr-free, and resistant to loosening under vibration.
Q: What is the operating temperature range?
A: -35°C to 80°C.
Q: Can the coupling compensate for misalignment?
A: Yes. The polyurethane spider compensates for radial, angular, and axial deviations while absorbing vibration.
Q: Is the coupling corrosion-resistant?
A: Yes. Made from SUS304 stainless steel with polished surface treatment – excellent corrosion resistance for harsh environments.
Q: What are the main applications?
A: Servo motors, stepper motors, CNC machines, food packaging, metallurgy, photovoltaic, chemical, semiconductor, printing, and railway equipment.
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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