Tsubaki PL4-15/16 Power Lock Keyless Locking Assembly

Description:

The Tsubaki PL4-15/16 Power-Lock Keyless Locking Assembly is used in industrial power transmission systems to create a high-strength, backlash-free connection between a 4-15/16 inch shaft and a mounted component without the need for keys or keyways. Commonly installed on sprockets, gears, pulleys, timing cams, 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 provide secure shaft mounting while simplifying installation and removal.

Applications:

The Tsubaki PL4-15/16 is part of the AS Series POWER-LOCK® keyless locking assemblies designed to eliminate backlash and shaft weakening associated with traditional keyed connections. Its self-centering design provides 360-degree positioning, high torque transmission, and excellent resistance to reversing and shock loads while allowing repeated assembly and disassembly without shaft damage. It is ideal for conveyors, indexing tables, packaging equipment, gear drives, timing pulleys, and industrial power transmission systems.

Technical Specifications:

• Manufacturer: Tsubaki Emerson Co.
• Model / Part Number: PL4-15/16
• Product Type: Keyless Locking Assembly
• Series: POWER-LOCK® AS Series
• Shaft Diameter: 4-15/16 in (4.9375 in)
• Locking Type: Mechanical Friction Lock (Keyless)
• Design: Self-Centering
• Outside Diameter: 7.0866 in
• Overall Length (L): 1.496 in
• Effective Length (Lt): 1.339 in
• Hub Length Required: 1.969 in
• Transmissible Torque: 12,730 lb-ft (17,260 N·m minimum)
• Axial Thrust Capacity: 61,600 lbf
• Number of Locking Screws: 15
• Screw Size: M12 × 35 mm
• Tightening Torque: 105 N·m
• Approximate Weight: 8.1 lb
• Function: Creates a backlash-free, keyless shaft-to-hub connection for high torque transmission
• Application: Sprockets, gears, pulleys, timing cams, rollers, conveyors, packaging machinery, and industrial power transmission systems.

Common Replacements:

• Tsubaki PL4-7/16 POWER-LOCK Assembly
• Tsubaki PL5 POWER-LOCK Assembly
• Tsubaki PL130X180 POWER-LOCK Assembly