Overview
The Magnaloy M400 is a standard spline bushed flexible drive coupling designed for reliable power transmission between rotating shafts in industrial machinery. This proven coupling series delivers high torque capacity in a lightweight package, making it ideal for equipment requiring both durability and minimal weight penalty.
Key Features
- Lightweight magnesium construction—76% lighter than cast iron, 36% lighter than aluminum, yet stronger than both
- Standard spline bushed bore design for secure, repeatable shaft engagement
- Flexible elastomeric insert accommodates minor misalignment and shock loads
- Neoprene insert material with good general-purpose resiliency and load capability
- Wide operating temperature range suited to industrial environments
Technical Specifications
The Magnaloy M400 series is available in both standard (inch) and metric bore configurations. Coupling inserts are sold separately to allow selection of durometer (hardness) and material based on application requirements.
Typical Applications
- Industrial machinery power transmission
- Pump and motor shaft connections
- Compressor drive systems
- Conveyor and material handling equipment
- General manufacturing machinery requiring flexible coupling with low inertia
Compatibility & Replacements
Compatible With
- Standard inch-bore and metric-bore shaft sizes
- Motors and driven equipment using flexible coupling mounting
- Applications requiring neoprene elastomer insert material
- Industrial machinery with minor shaft misalignment requirements
Replaces / Drop-In Replacement For
The Magnaloy M400 standard spline bushed configuration is a direct replacement for other M400 couplings requiring the same bore, key, and insert specifications. Verify bore size, keyway dimensions, and insert compatibility before ordering.
Works With
- Magnaloy M400 elastomeric inserts (neoprene, optional durometers)
- Standard shaft keyways (inch and metric options)
- Flexible coupling mounting practices for industrial power transmission





