JMJ elastic diaphragm coupling

JMJ Elastic Diaphragm Coupling – High-Performance Flexible Coupling for Demanding Industrial Applications

Product Overview

The JMJ Elastic Diaphragm Coupling is a precision-engineered flexible coupling designed to deliver superior torque transmission, vibration damping, and misalignment compensation in high-speed, high-power applications. Combining the durability of metal diaphragms with the flexibility of high-grade elastomers, this coupling ensures reliable performance in critical machinery such as compressors, turbines, pumps, and precision servo systems.

Key Features & Innovations

1. Advanced Hybrid Diaphragm Design

Multi-layer stainless steel diaphragms (AISI 304/316) for high torque capacity and flexibility

Integrated polyurethane/NBR damping elements for superior vibration absorption

Precision-balanced construction (G2.5 standard, G1.0 optional) for smooth high-speed operation

2. Performance Advantages

Zero Backlash: Ensures precise motion control for servo and automation systems

High Misalignment Tolerance:

Angular: Up to ±1.5°

Parallel: Up to ±0.5mm

Axial: Up to ±2mm

Torsional Stiffness: Adjustable (50–5,000 Nm/rad) to match application requirements

High-Speed Capability: Rated up to 20,000 RPM (depending on size)

3. Robust & Maintenance-Free Construction

No lubrication required – Eliminates downtime and maintenance costs

Corrosion-resistant materials (stainless steel, anodized aluminum) for harsh environments

Fail-safe design – Prevents sudden disconnection under overload conditions

Technical Specifications

Mechanical Performance

Torque Range: 50 Nm – 50,000 Nm

Peak Torque Capacity: 300% of rated torque

Temperature Range: -40°C to +120°C (extended range available)

IP Rating: IP65 (standard), IP68 optional

Material Options

Hubs: Stainless steel, aluminum alloy, or forged steel

Diaphragms: AISI 304/316L, titanium (for aerospace applications)

Elastomers: Standard polyurethane, oil-resistant NBR, FDA-compliant EPDM

Industry-Specific Benefits

✔ Oil & Gas: API 671 compliant for turbomachinery
✔ Marine & Offshore: Saltwater-resistant with ABS/DNV certification
✔ Power Generation: Handles thermal expansion in turbine systems
✔ Industrial Automation: Zero backlash for robotic and CNC precision

Installation & Longevity

Quick-connect design for easy installation and alignment

Laser-etched torque marks for proper bolt tightening

Predictive maintenance-friendly – Vibration sensors can be integrated

Service Life: 100,000+ hours under normal operating conditions

The JMJ Elastic Diaphragm Coupling is the ideal solution for industries requiring high torque, precision alignment, and long-term reliability without maintenance.