Overview
The TB Woods 8J Sure-Flex Plus coupling sleeve (model 8JE) is a proven elastomeric flexible coupling insert engineered for reliable power transmission in industrial machinery. Built with EPDM material, this one-piece solid construction insert delivers 1475 in-lb torque capacity while eliminating the need for lubrication and routine maintenance. The 4-way flexing design absorbs shock, misalignment, and end float across a wide range of industrial applications including pumps, compressors, blowers, and conveyor systems.
Key Features
- One-piece solid EPDM construction for simplified assembly and reliable performance
- 4-way flex action absorbs shock, angular/parallel misalignment, and axial end float
- No lubrication required—reduces maintenance downtime and operational costs
- Wide temperature range from -30 °F to +275 °F for harsh and moderate environments
- Quiet, smooth operation with damping characteristics ideal for precision machinery
- Compatible with standard Sure-Flex Plus hub assemblies and flange configurations
Technical Specifications
TB Woods 8J Coupling Sleeve Specifications:
- Part Number: 8J / 8JE
- Coupling Size Code: 8
- Sleeve Type: JE (One-Piece Solid)
- Material: EPDM Elastomer
- Torque Capacity: 1475 in-lb
- Maximum Speed: 4500 RPM
- Horsepower @ 100 RPM: 2.3 hp
- Horsepower @ 1750 RPM: 41 hp
- Horsepower @ 3500 RPM: 82 hp
- Torsional Stiffness: 4335 in-lb/rad
- Outside Diameter: 5.0625 in (5-1/16 in)
- Sleeve Length: 2.5 in (2-1/2 in)
- Bore Range: 7/16 in to 2-3/8 in ID
- Maximum Angular Misalignment: 1.0°
- Maximum Parallel Misalignment: 0.020 in
- Operating Temperature Range: -30 °F to +275 °F
- Color: Black
Typical Applications
The TB Woods 8J coupling sleeve is well-suited for a wide range of industrial power transmission systems where flexibility and low maintenance are critical:
- Centrifugal and rotary pumps
- Reciprocating and screw compressors
- Industrial blowers and fans
- Conveyor and bucket elevators
- Mixers and agitators
- Electric motor-to-driven-equipment connections
- Refrigeration compressor packages
- ANSI-rated pump packages
Compatibility & Replacements
Compatible With
- TB Woods Sure-Flex Plus coupling hubs (all flange types and bore configurations)
- Standard coupling shafts and flanges sized for 8J/8JE sleeves
- Industrial motor and pump drive systems
- ANSI-rated centrifugal pump packages
Replaces / Drop-In Replacement For
- Original equipment Sure-Flex 8J/8JE coupling sleeves
- Direct replacement for failed or worn Sure-Flex Plus 8JE inserts
- Verify your existing hub assembly configuration (flange type, bore) before ordering to ensure compatibility
Works With
- TB Woods Sure-Flex Plus coupling system
- Standard metric and imperial shaft sizing (7/16 in to 2-3/8 in bore)
- Type C clamp hub and standard flange hub configurations
- Motor and driven equipment assemblies requiring flexible power transmission
