Value Collection NL-68L Negative Lock Pin Indexable Turning

Product Description

The VALUE COLLECTION NL-68L is a negative lock pin designed to secure indexable inserts in turning tool holders. This precision clamping component uses a 3/8-24 threaded shank and a 9/64 inch hex socket drive to hold negative-rake inserts firmly against the insert pocket, preventing rotation or lift during cutting operations. With an overall length of 0.95 inches and a 3/4 inch inscribed circle (IC) rating, this pin is sized for standard toolholder configurations commonly found on CNC and manual lathes. Machinists and toolroom technicians install this type of component as part of routine insert indexing and toolholder maintenance.

This lock pin is suited for use in indexable turning toolholders that accept negative-style inserts with a center hole. It is appropriate for both CNC lathe applications and manual turning setups in production and job-shop environments. The 3/8-24 thread is an industry-standard pitch for this class of toolholder hardware, making the NL-68L a common replacement item when original pins are lost, worn, or damaged during insert changes.

Key Features

• Negative lock pin design secures indexable inserts against rotation and axial lift in the insert pocket
• 3/8-24 threaded shank for secure engagement with toolholder body
• 9/64 inch hex socket drive for precise torque application during tightening
• 3/4 inch inscribed circle rating matches standard negative-insert toolholder geometry
• 0.95 inch overall length fits common turning toolholder configurations
• Industry standard number NL-68L for straightforward cross-referencing and reordering

Compatibility

Designed as an OEM-style replacement negative lock pin for indexable turning toolholders that accept 3/4 inch IC negative-style inserts with a 3/8-24 threaded pin bore.

Installation Notes

Installation is performed by machinists or toolroom personnel as part of insert indexing or toolholder maintenance. Before replacing the lock pin, ensure the machine is fully de-energized, the spindle is locked, and all cutting forces are relieved. Use a calibrated 9/64 inch hex key to seat and tighten the pin; do not overtighten, as this can damage the insert or toolholder bore. Inspect the threaded bore in the toolholder for wear or contamination before installing a new pin.