Overview
The Falk 40T31 is a spacer hub component designed as part of the Steelflex grid coupling family, manufactured by Falk (now Regal Rexnord). This Falk 40T31 unit serves as a full spacer configuration (Type T31) and accommodates high torque loads while providing flexible coupling action ideal for pump applications and general industrial drive systems. The component features cast iron construction with precisely machined bore and keyway options, supporting multiple shaft connection methods.
Key Features
- Type T31 Full Spacer Design: Complete center section engineered for drop-out serviceability of connected equipment bearings and seals without full coupling removal
- Torsional Flexibility: Absorbs shock and vibratory loads by as much as 30%, reducing peak loads and equipment stress
- High Torque Capacity: Available in 19 sizes (1020T through 1200T) with ratings up to 1,650,000 lb-in torque
- Minimal Maintenance: 5-year lubrication warranty with Falk LTG (Long Term Grease); no periodic maintenance required when properly lubricated at installation
- Quick Service Access: Center grid element designed to drop out for rapid element replacement without hub repositioning or shaft realignment
Technical Specifications
- Coupling Type: Type T31 Full Spacer Grid Coupling
- Manufacturer: Falk (Regal Rexnord)
- Series: Steelflex Grid Couplings
- Configuration: Spacer Hub Component
- Size Range: 1020T through 1200T (19 available sizes)
- Maximum Torque Rating: 1,650,000 lb-in (full series range up to 8,250,000 lb-in)
- Maximum Shaft Diameter: 20.88 inches
- Lubrication: Falk LTG Long Term Grease (factory-filled)
- Operating Temperature Range: Standard industrial range (refer to specific size data)
- Warranty: 5 years (with Falk LTG lubrication)
- Material: Cast iron hubs; high-strength alloy steel grid (quenched, tempered, shot-peened)
Typical Applications
- Centrifugal and positive displacement pumps
- Motor-to-pump drive connections (turbine, electric motor)
- Industrial fans, blowers, and HVAC systems
- Compressor drive trains
- Pulp and paper mill machinery
- Mining and aggregate processing equipment
- General factory floor power transmission (with moderate shock loads)
Compatibility & Replacements
Compatible With
- All Falk Steelflex grid coupling systems and frame sizes within the Type T31/T35 series
- Taper-lock bushings (standard and custom bore options available)
- Rigid and flexible shaft mounting configurations
- NEMA 60 Hz and 50 Hz motor coupling applications
- Industrial drive systems requiring flexible coupling action (pump drives, compressors, fans, blowers)
Replaces / Drop-In Replacement For
The Falk 40T31 spacer hub is a standard component for all Falk Type T31 grid couplings. Verify your specific coupling size and configuration with coupling documentation or contact your system integrator to confirm exact replacement model. The 40T31 designation refers to the spacer hub component; the full coupling model number typically includes the size designation (e.g., 1040T31).
Works With
- Falk Type T31 Grid Coupling centers and covers (complete assemblies)
- Falk Type T35 half-spacer configurations (as required)
- Rexnord/Falk engineering selection software and coupling design guides
- Standard mechanical power transmission design practices (SAE, ISO)
- Fluid coupling and brake coupling applications (where configured)
