Vlier SLR500 Locking Knob Handle Plunger 1/2-13

Product Description

The VLIER SLR500 is a locking knob handle plunger designed for precision indexing, positioning, and locking applications in industrial and mechanical assemblies. The unit features a 1/2-13 thread size with a thread length of 0.65 inches and a body length of 1.38 inches. The steel plunger reaches a maximum diameter of 0.248 inches with a projection of 0.25 inches. End force ranges from 1 pound initial to 10 pounds final, making it suitable for applications that require a firm, repeatable hold. The countersunk knob style and zinc gold chromate finish contribute to corrosion resistance and a clean installation profile.

The SLR500 is used in machine tool fixtures, jigs, workholding devices, and general-purpose industrial equipment where a manually operated locking plunger is needed. The locking knob allows the operator to retract and hold the plunger in the retracted position, which simplifies loading and unloading of workpieces. Typical installation environments include manufacturing, assembly, and maintenance operations where repeatable positive stops are required.

Key Features

• Locking knob retracts and holds plunger for hands-free workpiece handling
• Countersunk knob style for a low-profile installation
• 1/2-13 thread for secure mounting in standard tapped holes
• 1 pound initial to 10 pounds final end force for firm, repeatable positioning
• Steel construction with zinc gold chromate finish for corrosion resistance
• Compact body length of 1.38 inches suits space-constrained assemblies

Compatibility

Designed as a standard locking knob handle plunger for use in industrial fixtures, jigs, and positioning assemblies that accept a 1/2-13 threaded plunger body.

Installation Notes

Installation is typically performed by maintenance technicians or machine builders using standard hand tools. Ensure the mating tapped hole is clean and free of debris before threading in the plunger body. Disengage all energy sources and secure movable components before servicing any assembly containing this plunger. Do not exceed the rated end force range when specifying this unit for a given application.