Tsubaki R1-2 7 8 Split Taper Bushing

Description:

The Tsubaki R1-2 7/8 Split Taper Bushing is used in industrial power transmission systems to securely mount sprockets, pulleys, sheaves, and couplings onto a 2-7/8 inch shaft. Commonly installed in conveyor systems, material handling equipment, pumps, fans, agricultural machinery, and industrial processing equipment requiring a precision taper-lock connection. Maintenance teams and system integrators use this split taper bushing for repair, retrofit, expansion, or replacement to ensure secure shaft mounting and reliable torque transmission.

Applications:

The Tsubaki R1-2 7/8 is a Type R1 split taper bushing designed to provide concentric shaft alignment and high holding power through its double-split barrel design. Its 2-7/8 inch finished bore and self-locking taper allow for easy installation and removal while minimizing shaft damage. It is ideal for mounting sprockets, timing pulleys, V-belt sheaves, and couplings in conveyors, pumps, fans, compressors, and other industrial drive systems.

Technical Specifications:

• Manufacturer: Tsubaki Emerson Co.
• Model / Part Number: R1-2 7/8 (R1-2P)
• Product Type: Split Taper Bushing
• Series: Type R1
• Bore Size: 2-7/8 in
• Bore Type: Finished Bore with Keyway
• Bushing Style: Split Taper
• Material: Steel
• Flange Diameter: 5-3/8 in
• Overall Length: 2-7/8 in
• Flange Thickness: 5/8 in
• Barrel Diameter: 3-7/8 in (Small End) / 4 in (Large End)
• Bolt Circle Diameter: 4-5/8 in
• Number of Bolt Holes: 3
• Cap Screw Size: 3/8 in × 1-3/4 in
• Torque Rating: 348 in-lb
• Mounting: Split taper shaft mount with keyway
• Function: Securely mounts sprockets, pulleys, sheaves, and couplings to shafts
• Application: Conveyors, fans, pumps, compressors, material handling equipment, and industrial power transmission systems

Common Replacements:

• Tsubaki R1-2 3/4 Split Taper Bushing
• Tsubaki R1-3 Split Taper Bushing
• Browning R1 2-7/8 Split Taper Bushing