Overview
The Falk 1040T31 spacer hub is a precision-engineered steel component designed for use with Steelflex grid couplings in industrial power transmission applications. Manufactured by Falk (now Rexnord), this spacer hub features a straight bore design with rough stock finish, allowing field machining to precise shaft dimensions. The 1040T31 is part of the T31/T35 series and is suitable for motor-to-pump and equipment shaft connections requiring flexible coupling alignment.
Key Features
- Steelflex grid coupling hub for T31 spacer coupling designs
- Straight rough stock bore accommodates 0.5 to 2.125-inch shaft diameters
- Rated for 3,600 rpm maximum operating speed
- 2,200 ft-lbs torque capacity for reliable power transmission
- Steel construction for durability and long service life
- Compatible with T31, T35 close-coupled, and R35 half-spacer applications
Technical Specifications
| Coupling Size Code | 1040T |
| Hub Type | T31/T35 Spacer Hub |
| Bore Type | Rough Stock Bore (RSB) |
| Bore Diameter Range | 0.5 to 2.125 inches |
| Hub Barrel Outside Diameter | 3.09 inches |
| Hub Length | 2.13 inches |
| Length Through Bore | 2.13 inches |
| Torque Capacity | 2,200 ft-lbs |
| Maximum Speed | 3,600 rpm |
| Hub Material | Steel |
| Set Screws | None (rough bore requires custom machining) |
| Number of Teeth | 32 |
| Weight | Approximately 5.25 lbs |
| Coupling Type | Grid |
| Condition | New in Box |
Typical Applications
The Falk 1040T31 spacer hub is commonly used in industrial automation and mechanical power transmission systems including:
- Motor-to-pump couplings in HVAC and fluid handling systems
- Compressor and blower drive trains
- Industrial fan and conveyor systems
- Precision machinery requiring flexible shaft alignment
- Heavy-duty industrial drive systems rated up to 3,600 rpm
- Applications requiring custom bore sizing and keyway configurations
Compatibility & Replacements
Compatible With
- Falk 1040T Steelflex grid couplings
- T31 spacer coupling designs and assemblies
- T35 close-coupled coupling applications
- R35 half-spacer coupling systems
- Motor and pump shaft connections up to 2.125-inch bore
- Industrial equipment requiring grid-type flexible coupling components
Replaces / Drop-In Replacement For
The Falk 1040T31 spacer hub is the direct component for 1040T coupling assemblies. Verify the specific bore and keyway requirements with your system integrator before ordering, as rough stock hubs require custom machining to fit your exact shaft dimensions.
Works With
- Falk/Rexnord Steelflex grid coupling elastomer elements
- Standard industrial motor and equipment shafts (0.5 to 2.125 inches)
- Manual and automated machine tool spindles
- Precision shaft alignment systems
- Industrial machinery control systems and variable frequency drives
