TBWOODSTB7S178 TB-7S178 Sure-flex Plus Type S Flange Size 7

Product Description

The TBWOODSTB7S178 TB-7S178 is a Sure-Flex Plus Type S flange designed for Size 7 elastomeric sleeve couplings. It features a finished bore of 1-7/8 inches with a bore tolerance of +0.0005 to +0.0015 inches, a 1/2 inch x 1/8 inch keyseat, and a 5/16-18 UNC setscrew. Constructed from high-strength cast iron, this flange delivers continuous torque ratings of 940 in-lb with EPDM or Neoprene sleeves and 2,875 in-lb with Hytrel sleeves. It is rated for operation up to 5,250 RPM and 50 horsepower at 100 RPM. Licensed millwrights, mechanical contractors, and industrial maintenance technicians install this component in power transmission assemblies.

This flange is suited for industrial power transmission applications where flexible shaft coupling is required between a driver and driven component. It fits into systems using EPDM, Neoprene, Hytrel, or Urethane elastomeric sleeves depending on the torque and misalignment requirements of the application. Typical installations include pump drives, compressor drives, conveyor systems, and general industrial equipment. The flange accommodates angular misalignment of up to 1 degree with EPDM or Neoprene sleeves and up to 1/4 degree with Hytrel sleeves, and parallel misalignment up to 7 inches as rated. Angular gap misalignment is 0.081 inches with EPDM or Neoprene and 0.020 inches with Hytrel sleeves.

Key Features

• High-strength cast iron construction for durable power transmission service
• 1-7/8 inch finished bore with precision tolerance of +0.0005 to +0.0015 inches
• Continuous torque rating of 940 in-lb with EPDM or Neoprene sleeves and 2,875 in-lb with Hytrel sleeves
• Maximum speed rating of 5,250 RPM
• Compatible with EPDM, Neoprene, Hytrel, and Urethane elastomeric sleeves
• 5/16-18 UNC setscrew with one over keyway and one at 90 degrees for positive shaft retention

Compatibility

Designed for use with Size 7 Sure-Flex Plus elastomeric sleeve couplings using EPDM, Neoprene, Hytrel, or Urethane sleeves. Compatible bore range for this coupling size is 0.625 inches minimum to 1.875 inches maximum.

Installation Notes

Installation should be performed by a qualified millwright or mechanical technician. Disconnect and lock out all power to the drive system before handling coupling components. The setscrew requires 13 ft-lb of torque to seat properly per the manufacturer specification. Verify shaft and bore alignment within the rated misalignment limits for the sleeve type being used before placing the system in service.

Technical Specifications

• Coupling Size: 7
• Bore Size: 1-7/8 inches
• Bore Tolerance: +0.0005 to +0.0015 inches
• Construction Type: Finish bore with keyway
• Material: High-strength cast iron
• Keyseat Size: 1/2 inch x 1/8 inch
• Setscrew Size: 5/16-18 UNC, one over keyway and one at 90 degrees
• Setscrew Torque Requirement: 13 ft-lb
• Torque Rating (EPDM or Neoprene sleeve): 940 in-lb continuous
• Torque Rating (Hytrel sleeve): 2,875 in-lb continuous
• Horsepower Rating at 100 RPM: 50 HP
• Maximum Speed: 5,250 RPM
• Max Angular Misalignment (EPDM or Neoprene): 1 degree
• Max Angular Misalignment (Hytrel): 1/4 degree
• Max Angular Gap Misalignment (EPDM or Neoprene): 0.081 inches
• Max Angular Gap Misalignment (Hytrel): 0.020 inches
• Flange Diameter (D): 4.625 inches
• Outside Diameter: 4.625 inches
• Hub Diameter: 2.8125 inches
• Length Through Bore: 1.84375 inches
• Dimension C: 1-27/32 inches
• Dimension H: 2-13/16 inches
• Dimension S: 3/8 inches
• Dimension T: 11/16 inches
• Dimension E: 1 inch
• Component WR2: 0.0434 lb-ft2

Standard Information

• Brand: TBWOODSTB7S178
• Manufacturer Part Number: TB-7S178