Tb Woods TB-7S138 Sleeve Coupling Spacer Flange Size 7

Product Description

The TB WOODS TB-7S138 is a Type S spacer flange designed for sleeve-style flexible couplings used in industrial power transmission systems. It features a 1.375-inch bore machined to size for a slip fit on standard shafts, eliminating the need for field boring. Constructed from high-strength cast iron, this Size 7 flange handles up to 1.2 horsepower at 100 RPM with EPDM or Neoprene sleeves, and up to 4.6 horsepower at 100 RPM with a Hytrel sleeve. The flange is rated to a maximum of 5250 RPM. Industrial maintenance technicians and millwrights install this component as part of a complete sleeve coupling assembly connecting two shaft ends.

This spacer flange is suited for general industrial drive applications where a sleeve coupling connects a motor or gearbox shaft to driven equipment. The spacer design allows for axial separation between shaft ends, which aids in installation and removal without requiring equipment to be repositioned. The 4.625-inch flange diameter and overall coupling length of 2.8125 inches make it a practical fit in standard Size 7 sleeve coupling installations found in pumps, fans, conveyors, and similar rotating equipment.

Key Features

• High-strength cast iron construction for durability in industrial drive environments
• Bored-to-size at 1.375 inches for immediate slip fit on standard shafts
• Type S spacer flange design allows installation and removal without moving connected equipment
• Rated to 5250 RPM maximum speed
• Compatible with EPDM, Neoprene, and Hytrel sleeve elements at Size 7
• Size 7 coupling code for straightforward cross-reference and replacement

Compatibility

Designed as an OEM-style replacement or new-installation spacer flange for Size 7 sleeve coupling assemblies. Sleeve element horsepower ratings vary by element material: 1.2 hp at 100 RPM with EPDM or Neoprene elements, and 4.6 hp at 100 RPM with Hytrel elements.

Installation Notes

Installation is typically performed by a millwright or maintenance mechanic. De-energize and lock out the drive equipment before handling any coupling components, following OSHA lockout/tagout procedures. Inspect the shaft for burrs or damage before sliding the flange into position, and verify shaft diameter matches the 1.375-inch bore before installation. Do not exceed the rated maximum speed of 5250 RPM in the assembled drive.

Technical Specifications

• Bore Diameter: 1.375 inches
• Bore Type: Bored to Size
• Coupling Size Code: 7
• Flange Diameter: 4.625 inches
• Outside Diameter: 4.625 inches
• Hub End Outside Diameter: 3.9375 inches
• Coupling Overall Length: 2.8125 inches
• Length Through Bore: 1.84375 inches
• Hub Flange Type Code: S
• Hub Type: Spacer Flange
• Material: High Strength Cast Iron
• Max RPM: 5250 rpm
• Horsepower at 100 RPM (EPDM and Neoprene): 1.2 hp
• Horsepower at 100 RPM (Hytrel): 4.6 hp

Standard Information

• Brand: TB WOODS
• Manufacturer Part Number: TB-7S138