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NM Series Cast Iron Elastic Jaw Coupling | Multi-Jaw Flexible Coupling with Natural Rubber Insert for Industrial Water Pumps
Model Number
Check below, custom
NM50-50*25
NM128-128*70
NM214-218*112
NM67-67*30
NM82-82*40
NM97-97*50
NM112-112*60
NM148-148*80
NM168-168*88
NM194-198*100
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
Quiet & Vibration-Dampening Power Transmission: NM Series Cast Iron Elastic Jaw Coupling
The Apexcoupling NM Series Elastic Jaw Coupling is engineered for reliable, low-noise power transmission in industrial water pumps, electric motors, blowers, compressors, and general mechanical drives. Composed of two precision-cast iron multi-jaw hubs and an oil-resistant, shock-absorbing natural rubber ring insert, the NM series provides smooth torque transfer while isolating operational vibration and protecting driver and driven shafts from premature fatigue.
Manufactured in strict compliance with the GB9439 iron casting standard, NM couplings
feature precision-machined H7 inner bore tolerances to guarantee precise concentricalignment and minimal runout. Capable of handling maximum torque loads up to 125 kg m(1225 N . m) and driving motors up to 60 HP (45 kW) across shaft diameters from 7 mm to75 mm, the NM coupling delivers a lubrication-free, long-life solution that is straightforward to
install and service.
Core Product Advantages & Features
Precision Cast Iron Hubs (GB9439 Standard): Precision investment casting provides high structural integrity, smooth balance, and fracture prevention during continuous operation.
Resilient Natural Rubber Buffer Ring: Cushions start/stop impact loads, isolates dynamic vibration, and compensates for axial, radial, and angular misalignments.
Precision H7 Inner Bore Fitting: Machined within strict H7 tolerances to ensure tight shaft engagement, efficient torque transfer, and reduced runout.
Quiet & Lubrication-Free Operation: Non-metallic elastomeric interface eliminates metal-to-metal friction, ensuring quiet running and zero maintenance lubrication requirements.
Wide Motor Power Compatibility: Ideal for electric motors up to 60 HP (45 kW) and shaft diameters ranging from 7 mm to 75 mm.
Full Customization Options: Custom keyways, specialized bore diameters, non-standard hub lengths, and OEM branding supported.
echnical Specifications Table
| Engineering Parameter | Technical Value / Specification (NM Series) |
| Product Model | NM Series Flexible Elastic Jaw Coupling (NM50 – NM214) |
| Hub / Body Material | High-Grade Precision Cast Iron (GB9439 Compliant) |
| Elastomer Insert Material | Durable Natural Rubber Ring Insert |
| Maximum Torque Capacity | Up to 125 kg.m (1225 N. m) |
| Applicable Shaft Diameters | Φ7 mm to Φ75 mm |
| Motor Power Range Fit | Up to 60 HP (45 kW) |
| Inner Bore Fitting Tolerance | H7 Precision Bore Class |
| Fixing Method Options | Standard Keyway + Set Screw (Custom Bores Supported) |
| Main Industrial Uses | Industrial Water Pumps, Fans/Blowers, Mixers, CNC, Packaging |
NM elastic coupling, NM jaw coupling, cast iron pump coupling, multi jaw flexible coupling, NM rubber insert coupling, water pump shaft connector.
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NM elastic coupling
