flexible coupler
shaft coupling,
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NM Series Flexible Motor Coupler for Pumps - High-Torque Cast Iron Coupling
Model Number
NM
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
Our NM Series Flexible Coupling is an essential component for efficient and reliable power transmission between motors and driven equipment, specifically designed for pump applications. This flexible motor coupler features a robust cast iron body and a durable, non-metallic spider insert that effectively absorbs vibration, compensates for minor misalignments (parallel, angular, and axial), and dampens shock loads. This protection extends the lifespan of both the motor and the pump.
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Engineered for high-speed operation and significant torque transmission, this coupling is compact, lightweight, and requires no lubrication, ensuring minimal maintenance. With a wide range of sizes and shaft hole diameters available, our standard flexible coupling offers a cost-effective and versatile solution for various industrial settings, including HVAC systems, water treatment plants, and manufacturing facilities. Its simple design allows for easy installation and replacement, reducing downtime.
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Features
Material:Â High-Grade Cast Iron body for superior strength and longevity.
Spider Insert:Â Non-metallic (e.g., Nylon, Polyurethane) spider for flexibility, vibration damping, and electrical insulation.
Standard Design:Â Conforms to industry standards (e.g., B1104) for easy replacement and compatibility.
Zero Lubrication:Â Maintenance-free operation, saving time and cost.
Easy Installation:Â Simple design allows for quick assembly and disassembly, minimizing downtime.
Customizable:Â Available in various sizes and colors to meet specific application requirements.
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Description
The NM Series Flexible Coupling is engineered to create a resilient connection between two shafts. It transmits torque through a cylindrical, non-metallic spider element positioned between the two coupling halves. This design is particularly suited for high-speed applications with substantial torque requirements and without sharp impacts, making it a premier choice for connecting motors to pumps. The flexibility of the spider element accommodates misalignment, protects bearings, and ensures smooth power transmission. As a leading supplier, we provide these couplings in a comprehensive size range to fit various motor and pump shaft dimensions, ensuring you find the perfect fit for your machinery.
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Specifications
Attribute | Value |
---|---|
Applicable Industries | Pumps, Building Material Shops, Manufacturing, etc. |
Material | Cast Iron |
Structure | Jaw / Spider |
Body Material | 45# Steel |
Flexible/Rigid | Flexible |
Dimensions | 50 – 400 mm |
Shaft Hole Size | 12 – 140 mm |
Nominal Torque | 25 – 12,500 N.m |
RPM | 1500 – 8500 r/m |
Surface Treatment | Carburizing, Blackening |
Customized Support | OEM Available |
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 (Advantages)
Advantage | Description |
---|---|
Protects Equipment | Absorbs vibration and misalignment, safeguarding motors and pumps from damage. |
High Performance | Capable of transmitting large torque at high rotational speeds. |
Compact & Lightweight | Saves space and reduces overall system inertia. |
Cost-Effective | Affordable solution with minimal maintenance requirements and long service life. |
Versatile Application | Ideal for various applications, especially in pump and motor systems. |
Easy to Install | Straightforward design ensures quick and hassle-free setup. |
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Product Show



Boost Your Pump Performance with KTR NM 128 Normex Flexible Coupling! 🚀
Key Features:
âś…Â Model: NM 128 Normex
âś…Â Rated Torque: 300 N.m |Â Max Speed: 1000 RPM
âś…Â Body Material: 45# Steel + Cast Iron
✅ Bore Diameter: 20 mm (Custom range: 12–140 mm)
âś…Â Type: Flexible Jaw/Spider Coupling
âś…Â Surface Treatment: Carburizing & Blackening
âś…Â Application: Ideal for pumps, small engines, and light machineryWhy Choose This Coupling?
Compact, lightweight, and easy to install
Handles misalignment and reduces vibration
No lubrication required — maintenance-free!
Cost-effective with OEM support available
Backed by 1-year warranty for peace of mind
Perfect for hotels, garment shops, building material stores, and industrial plants. Keep your systems running smoothly and efficiently! 🛠️💧

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