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Help CenterMechanical Jaw Coupling for Paper Industry - Flexible Standard Design
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Hebei Speed Torque Transmission Technology Co., Ltd. – since 2017, we have been dedicated to delivering high-quality power transmission solutions from our 3,000–5,000 m² facility in Cangzhou, China. Our Mechanical Jaw Coupling for Paper Industry – Flexible Standard Design is precisely engineered to meet the demanding requirements of paper mills, where reliability, shock absorption, and easy maintenance are critical. This coupling combines proven jaw geometry with a flexible elastomeric spider, providing a cost-effective yet robust connection for various paper machine drives.
The flexible standard design allows for quick installation and replacement without special tools, reducing downtime. Each coupling is manufactured under strict ISO 9001 quality control, ensuring consistent performance. Whether you need to connect a motor to a pump, a gearbox to a roller, or a conveyor shaft, this jaw coupling delivers reliable torque transmission while compensating for minor misalignments.
Below we detail the key features, technical specifications, and benefits that make this coupling the preferred choice for the paper industry.
Key Features & Benefits
- High Torque Density – The jaw design maximizes torque transfer in a compact package, suitable for both low and high power applications in paper mills.
- Misalignment Compensation – The flexible spider absorbs angular, parallel, and axial misalignments, protecting connected equipment from excessive stress and vibration.
- Shock & Vibration Damping – The elastomeric spider acts as a mechanical fuse, reducing peak loads and extending the life of bearings and seals.
- Maintenance-Friendly – No lubrication required; spider inspection and replacement can be done without moving the hubs, minimizing downtime.
- Standardized Design – Complies with international dimensions (e.g., DIN, ISO), making it interchangeable with many existing jaw couplings in the market.
- Wide Material Options – Hubs available in ductile iron or steel; spiders in polyurethane, Hytrel, or NBR to suit different temperatures, chemical exposures, and torsional stiffness requirements.
- Custom Bore & Keyway – We can machine bores to your exact shaft sizes (metric or inch) and add keyways per your specifications.
Technical Specifications
| Parameter | Range / Details |
|---|---|
| Coupling Size (Frame) | L050 – L225 (or equivalent) |
| Bore Range | 10 mm – 100 mm (custom up to 120 mm) |
| Rated Torque | 50 Nm – 5,000 Nm (higher on request) |
| Maximum Speed | Up to 6,000 RPM (dependent on size and balance) |
| Misalignment Capacity | Angular: ±1°, Parallel: ±0.38 mm, Axial: ±1.5 mm |
| Spider Hardness (Shore A) | 80A, 92A, 95A (polyurethane); 70A (NBR) |
| Hub Material | Ductile iron GGG40 / Steel 45# |
| Operating Temperature | -30°C to +100°C (polyurethane); -40°C to +120°C (Hytrel) |
| Weight (per coupling) | 0.5 kg – 25 kg (depending on size) |
Dedicated Advantages for Paper Industry Applications
Paper machines operate continuously at high speeds, with frequent start-stop cycles and exposure to moisture, dust, and heat. Our flexible jaw coupling addresses these challenges:
- Roller Drives – Smooth torque transfer reduces paper web breaks.
- Pulp Pump Connections – Spider absorbs pump pulsation and vibration.
- Conveyor Systems – Easy installation in tight spaces.
- Agitators & Mixers – Handles high inertia loads without failure.
- Winder Drives – Maintains alignment even with thermal expansion.
Compared to rigid couplings or gear couplings, our jaw coupling offers lower initial cost, simpler maintenance, and better shock protection. It is an excellent upgrade for existing paper mill equipment.
Quality Assurance & Trust
Every coupling is produced in our ISO 9001 certified facility. We use CNC machining centers and rigorous inspection processes, including hardness testing, ultrasonic crack detection, and torque validation. Our yearly export value of US$5–10 million to markets including North America, Europe, Southeast Asia, and Oceania proves global acceptance. With a team of 101–200 employees, we can handle both standard orders and custom engineering projects.
We ship from the ports of Shanghai, Tianjin, or Qingdao with lead times as short as 15–25 working days for standard sizes. All couplings come with a warranty against material and manufacturing defects.
Choose Hebei Speed Torque for your paper mill drive solutions. Our mechanical jaw coupling combines reliability, flexibility, and value. Contact us today for a quotation or technical consultation – our engineers are ready to help you select the right coupling for your machine.
Frequently Asked Questions (FAQ)
-
Q: What types of paper machines can this coupling be used on?
A: It suits a wide range – from stock preparation, paper forming, pressing, drying, to winding sections. Typical applications include drive connections for pumps, fans, rollers, and conveyors. -
Q: Does this coupling require lubrication?
A: No. The jaw coupling is a dry coupling – no oil or grease needed. The only wear part is the spider, which can be replaced without disconnecting the hubs. -
Q: How often should I replace the spider?
A: Spider life depends on load, speed, and misalignment. In a typical paper machine environment, replacement intervals range from 6 months to 2 years. Visual inspection every 3 months is recommended. -
Q: Can you supply the coupling with metric or inch bores?
A: Yes, we machine bores and keyways to your exact specifications – both metric and imperial sizes are available. Please provide shaft diameters when ordering. -
Q: What is the maximum torque capacity for the largest standard size?
A: The L225 frame (our largest standard) can handle up to 5,000 Nm. For higher torque requirements (up to 10,000 Nm), we offer a heavy-duty series – please consult our sales team. -
Q: Do you sell replacement spiders separately?
A: Absolutely. Spiders are sold individually or in kits. We stock common sizes for quick delivery. -
Q: Is the coupling suitable for high-humidity or wash-down environments?
A: Yes. The standard ductile iron hubs have a black oxide finish that provides basic corrosion resistance. For extreme moisture, we recommend optional paint or stainless steel hubs (custom request). -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is 1 piece for standard sizes, making it easy for trials or small maintenance orders. For custom bores, MOQ may be 5–10 pieces depending on complexity.
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