Tb Woods TB-8S178 Sleeve Coupling Flange Size 8

Product Description

The TB WOODS TB-8S178 is a finished bore sleeve coupling flange designed for direct mounting to keyed shafts in industrial drive applications. Sized at coupling size 8, it features a 1-7/8 inch round keyed bore with tight tolerances of +0.0005 inch to +0.0015 inch, ensuring a secure, precise shaft fit. The cast iron hub measures 3-1/4 inches in diameter with a 5-29/64 inch outside diameter and a hub body length of 3/4 inch. Rated to 4,500 RPM maximum speed, this flange half mates with a matched sleeve insert to form a complete flexible sleeve coupling assembly. Installation is performed by millwrights and mechanical technicians during drivetrain setup or coupling replacement.

The TB-8S178 is suited for use in compressor, conveyor, motor, and pump drive trains where angular and parallel misalignment compensation is required. The 4-way flexing action of the sleeve coupling design absorbs shock, vibration, end float, and both angular and parallel misalignment. This makes it a practical choice for industrial facilities running continuous-duty rotating equipment that experiences dynamic loading or slight shaft offset conditions. It is measured and specified in the inch system of measurement.

Key Features

• Coupling size 8 with 1-7/8 inch finished round keyed bore
• Bore tolerance of +0.0005 inch to +0.0015 inch for precise shaft fit
• 4-way flexing action accommodates angular misalignment, parallel misalignment, end float, and shock
• Cast iron hub construction with chemical and oil resistance
• Rated to 4,500 RPM maximum speed
• Includes two set screws — one over the key and one at 90 degrees — with 3/8 inch-16 thread size

Compatibility

Designed as an OEM-style replacement or direct-fit flange half for TB WOODS size 8 sleeve coupling assemblies using a matched sleeve insert on inch-dimensioned keyed shafts.

Installation Notes

Installation is typically performed by a qualified millwright or mechanical technician. Disconnect and lock out all power to the driven equipment before mounting or removing coupling flanges. Ensure shaft surfaces are clean and free of burrs before pressing the bore onto the shaft. Torque set screws to the coupling manufacturer specifications and verify angular and parallel alignment of both shafts after assembly before returning the drive to service.

Technical Specifications

• Coupling Size: 8
• Maximum Speed: 4,500 RPM
• Outside Diameter: 5-29/64 inches
• Bore Diameter: 1-7/8 inches
• Bore Type: Round Keyed
• Bore Tolerance: +0.0005 inches / +0.0015 inches
• Keyway Width: 1/2 inch
• Keyway Depth: 1/4 inch
• Length Through Bore: 2-3/32 inches
• Hub Diameter: 3-1/4 inches
• Hub Body Length: 3/4 inch
• Hub Type: Flange Hub
• Hub Material: Cast Iron
• Misalignment Types: Angular, Parallel
• Set Screws Included: 2 — one over the key and one at 90 degrees
• Screw Thread Size: 3/8 inch-16
• Resistance Properties: Chemical Resistant, Oil Resistant
• Weight: 4.4 pounds
• System of Measurement: Inch
• Country of Origin: Mexico (subject to change)

Standard Information

• Brand: TB WOODS
• Manufacturer Part Number: TB-8S178