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Help CenterHigh Torque Coupling 17-4PH Stainless Steel 120Nm 5000RPM Keyless Locking Mechanism
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As a leading manufacturer from Henan San Kuang Machinery Technology Co., Ltd., established in 2014 with a 10,000–30,000 m² factory and 51–100 skilled employees, we present our High Torque Coupling 17-4PH Stainless Steel 120Nm 5000RPM Keyless Locking Mechanism. This coupling is engineered to deliver reliable, backlash-free power transmission in demanding industrial environments. The keyless locking design eliminates keyways and setscrews, providing zero backlash, easy installation, and reduced maintenance. Made from precipitation-hardened 17-4PH stainless steel, it offers excellent corrosion resistance, high strength, and fatigue resistance, making it ideal for applications in aerospace, automotive, robotics, and precision machinery.
Our coupling combines high torque capacity (120 Nm) with high rotational speed (5000 RPM) while maintaining compact dimensions. The keyless locking mechanism uses a tapered clamping ring or shrink disc that creates a uniform radial clamping force around the shaft, avoiding stress concentrations and ensuring concentricity. This results in smoother operation, extended component life, and lower vibration levels compared to traditional keyed couplings. The 17-4PH stainless steel material provides superior mechanical properties and can withstand harsh environments including moisture, chemicals, and high temperatures.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | 17-4PH Stainless Steel (condition H900 or H1025) |
| Rated Torque | 120 Nm (88.5 lbf·ft) |
| Maximum Speed | 5000 RPM |
| Locking Mechanism | Keyless (tapered split clamp or shrink disc) |
| Bore Diameter Range | 10 mm – 60 mm (custom sizes on request) |
| Torque Transmission | Friction-based, zero backlash |
| Operating Temperature | -40°C to +300°C |
| Surface Finish | Satin or passivated (Ra ≤ 1.6 μm) |
Key Advantages for Your Applications:
- No Backlash: The keyless connection ensures zero rotational play, critical for precision positioning and servo drives.
- Easy Installation & Adjustment: Simple axial tightening of clamping screws; can be repositioned without removing the coupling.
- High Torque Density: 120 Nm in a compact form factor saves space and reduces overall system weight.
- Corrosion & Fatigue Resistance: 17-4PH stainless steel withstands aggressive media, humidity, and cyclic loads.
- Dynamic Balancing: Precision-machined components allow high-speed operation up to 5000 RPM with minimal vibration.
- Customizable: Bore sizes, keyway (if needed), and overall length can be tailored to your shaft dimensions and space constraints.
This coupling is widely used in CNC machines, packaging equipment, printing presses, textile machinery, and wind turbine pitch systems. Its ability to handle misalignment (angular and parallel) also reduces stress on bearings and seals, extending the life of your entire drive train.
At Henan San Kuang Machinery Technology Co., Ltd., we have a proven track record: annual export value of US$2.5–5 million, serving markets across North America, Europe, Asia, and Africa. Our factory is certified with ISO9001, ISO14001, OHSAS18001, and we comply with HACCP, SA8000, and other international standards. Every coupling undergoes rigorous quality control including hardness testing, dimensional inspection, and torque verification. We also offer a 12-month warranty against material and workmanship defects. Choose our coupling for a reliable, maintenance-free solution that enhances your machinery's performance. Contact our sales team for a quote or customization request.
Frequently Asked Questions
-
What makes 17-4PH stainless steel better than other materials for couplings?
17-4PH is a precipitation-hardening stainless steel that offers high strength (up to 1300 MPa tensile), excellent corrosion resistance, and good toughness. It performs well in high-stress, high-speed, and corrosive environments, outlasting 304 or 316 stainless steel in many industrial applications. -
How does the keyless locking mechanism work?
The coupling uses a tapered clamping ring or segmented shrink disc that expands radially when axial screws are tightened. This creates uniform pressure on the shaft, locking it without any keyway or set screw. It transmits torque via friction and is self-centering. -
Can I use this coupling for reversing loads or frequent start/stop cycles?
Yes. The zero-backlash friction fit handles reversing torque without impact loads, making it suitable for servo motors, indexing tables, and applications with frequent direction changes. -
What bore sizes are available, and can you machine special dimensions?
Standard bore sizes range from 10 mm to 60 mm. We can machine special bores, keyways, or metric/inch combinations per your drawing. Minimum order quantity may apply for custom sizes. -
Is the coupling suitable for high-speed applications above 5000 RPM?
The coupling is designed for 5000 RPM max. For higher speeds, we offer dynamic balancing and different material options (e.g., aluminum or titanium). Please consult our engineers for speeds above this limit. -
Does the coupling require any maintenance?
Minimal. The stainless steel construction is corrosion-resistant and the clamping mechanism does not wear like elastomeric components. Periodic inspection of screw torque is recommended per the installation manual. -
What industries and applications have successfully used this product?
Typical uses include robotics joint drives, servo motor couplings, high-speed spindle drives, grinding machines, packaging lines, and marine propulsion systems. Our couplings are trusted by OEMs worldwide. -
What certifications does your company hold for quality assurance?
We are certified to ISO9001, ISO14001, OHSAS18001, and we also follow TL9000, QS9000, SA8000, HACCP, and other standards. Our quality management system ensures traceability and consistency.
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