Tsubaki Emerson Co. PL7/8 Power-Lock Keyless Bushing

Description:

The Tsubaki Emerson Co. PL7/8 Power-Lock Keyless Bushing is used in mechanical power transmission systems to create a secure, backlash-free shaft-to-hub connection without the need for keyways. Commonly installed in conveyor systems, gearboxes, sprockets, pulleys, timing cams, rollers, and industrial rotating equipment used in manufacturing and material handling processes. Maintenance teams and system integrators use this part for repair, retrofit, expansion, or replacement to ensure reliable torque transmission and simplified installation.

Applications:

The Tsubaki Power-Lock PL7/8 is designed for industrial power transmission applications where precise shaft locking and high torque capacity are required. It is widely used in conveyors, packaging machinery, automated production equipment, indexing tables, gear drives, and material handling systems to securely mount sprockets, gears, pulleys, and rollers while eliminating backlash and reducing machining requirements.

Technical Specifications:

• Manufacturer: Tsubaki Emerson Co.
• Model / Part Number: PL7/8
• Product Type: Power-Lock Keyless Bushing
• Series: AS Series Power-Lock
• Bore Diameter: 7/8 in (0.875 in)
• Outside Diameter: 1.850 in
• Overall Length: 1.024 in
• Material: Carbon steel
• Maximum Transmitted Torque: 217 ft-lb
• Maximum Transmitted Thrust: 5,940 lb
• Shaft Contact Pressure: 26,020 psi
• Hub Contact Pressure: 12,370 psi
• Locking Screws: 6 × M6 × 18
• Mounting: Shaft-to-hub mechanical locking assembly
• Operating Temperature: -22°F to 392°F (-30°C to 200°C)
• Application: Shaft locking for sprockets, gears, pulleys, rollers, and couplings in power transmission systems

Common Replacements:

• Tsubaki PL3/4 Power-Lock Keyless Bushing
• Tsubaki PL1 Power-Lock Keyless Bushing
• Tsubaki TF Series Power-Lock Keyless Locking Device