Tsubaki 150107 Power-Lock Keyless Locking Assembly

Description:

The Tsubaki PL1-3/8KE POWER-LOCK Keyless Locking Assembly is used in industrial power transmission systems to create a high-strength, backlash-free connection between a 1-3/8 inch shaft and a mounted hub without the need for keys or keyways. Commonly installed on sprockets, gears, pulleys, timing pulleys, couplings, and rollers in conveyor systems, packaging machinery, material handling equipment, and industrial automation. Maintenance teams and system integrators use this locking assembly for repair, retrofit, expansion, or replacement to ensure secure shaft mounting and reliable torque transmission.

Applications:

The Tsubaki PL1-3/8KE is part of the POWER-LOCK® KE Series and features a self-centering, keyless friction-locking design that provides uniform 360-degree shaft clamping. The assembly eliminates backlash, improves concentricity, and prevents shaft weakening caused by keyways while allowing quick installation and removal using standard hand tools. It is ideal for conveyors, packaging machinery, timing belt drives, gearboxes, pumps, fans, mixers, and other industrial equipment requiring accurate shaft-to-hub alignment and high torque transmission.

Technical Specifications:

• Manufacturer: Tsubaki Emerson Co.
• Model / Part Number: PL1-3/8KE (150107)
• Product Type: Keyless Locking Assembly
• Series: POWER-LOCK® KE Series
• Shaft Diameter: 1-3/8 in (1.375 in)
• Locking Type: Mechanical Friction Lock (Keyless)
• Design: Self-Centering
• Flange Type: Flangeless
• Outside Diameter: 2.125 in
• Overall Length: 1.299 in
• Length Through Bore: 2.250 in
• Maximum Transmitted Thrust: 7,295 lbf
• Number of Locking Screws: 10
• Screw Size: M5 × 20 mm
• Shaft Contact Pressure: 171 N/mm²
• Hub Contact Pressure: 15,954 psi
• Weight: 0.57 lb
• Function: Creates a backlash-free shaft-to-hub connection without keys or splines
• Application: Sprockets, gears, pulleys, timing pulleys, couplings, rollers, conveyors, packaging machinery, and industrial power transmission systems.

Common Replacements:

• Tsubaki PL1-1/4KE POWER-LOCK Assembly
• Tsubaki PL1-1/2KE POWER-LOCK Assembly
• Tsubaki PL35KE POWER-LOCK Assembly