Tb Woods TB-5J78 Sleeve Coupling Flange Size 5 Keyed

Product Description

The TB WOODS TB-5J78 is a finished bore sleeve coupling flange designed for direct mounting onto keyed shafts in close-coupled drive applications. It carries a coupling size rating of 5 and accepts a 7/8-inch bore with a round keyed configuration. Bore tolerances are held to +0.0005 inches / +0.0015 inches for a precise shaft fit. The hub is machined from carbon steel and has an outside diameter of 3-1/4 inches. Maximum rated speed is 7,600 RPM. The flange mates with a matched sleeve insert to complete the coupling assembly, accommodating both angular and parallel misalignment along with end float and vibration through a 4-way flexing action.

This coupling flange suits power transmission applications across a range of industrial and commercial equipment. Typical use cases include electric motor-to-pump connections, compressor drive trains, and conveyor shaft assemblies. The chemical-resistant and oil-resistant construction makes it appropriate for environments where incidental fluid exposure is expected. Installation is common in both new equipment builds and field replacement of worn or damaged coupling flanges in mechanical drive systems.

Key Features

• Finished bore round keyed design for direct shaft mounting with tight gap tolerances
• 4-way flexing action absorbs shock, vibration, angular misalignment, parallel misalignment, and end float
• Carbon steel hub construction with chemical and oil resistance
• Maximum operating speed of 7,600 RPM
• Includes two set screws: one positioned over keyseat and one at 90 degrees
• Rated for compressors, conveyors, motors, and pumps

Compatibility

Designed as an OEM-style replacement or new-installation coupling flange for size 5 sleeve coupling assemblies using keyed shafts measured in inch dimensions. Requires a matching sleeve insert to complete the coupling pair.

Installation Notes

Installation is typically performed by a qualified millwright or mechanical technician. De-energize and lock out the drive motor before removing or installing any coupling components per OSHA lockout/tagout procedures. Verify shaft diameter and keyway dimensions match the bore and keyway specs of this flange before pressing or sliding onto the shaft. Torque set screws using a calibrated hex key to the fastener manufacturer specification for the 5/16-18 thread size; do not overtighten against the keyseat.

Technical Specifications

• Coupling Size: 5
• Bore Diameter: 7/8 inches
• Bore Type: Round Keyed
• Bore Tolerance: +0.0005 inches / +0.0015 inches
• Keyway Width: 3/16 inches
• Keyway Depth: 3/32 inches
• Length Through Bore: 1-3/64 inches
• Outside Diameter: 3-1/4 inches
• Hub Diameter: 1-7/8 inches
• Hub Body Length: 29/64 inches
• Hub Material: Carbon Steel
• Maximum Speed: 7,600 RPM
• Shaft Type: Keyed
• Misalignment Types: Angular, Parallel
• Included Hardware: (2) Set Screws, 5/16-18 thread
• Weight: 0.9 pounds
• System of Measurement: Inch
• Country of Origin: USA (subject to change)

Standard Information

• Brand: TB WOODS
• Manufacturer Part Number: TB-5J78