Seco 02562791 Indexable Threading Toolholder Internal Left Hand

Product Description

The SECO 02562791 is an internal left-hand indexable threading toolholder designed for precision thread-cutting operations on CNC lathes and turning centers. Built from steel and part of the Snap Tap series, it accepts a 3/8-inch inscribed circle insert with 16NL insert compatibility and uses a clamp-style insert holding method. The toolholder features a CN-style profile with a shank measuring 0.957 inches in diameter and 0.902 inches in height, an overall length of 8 inches, and a minimum bore diameter of 1.15 inches. Coolant-through capability supports chip evacuation and tool life during internal threading cycles.

This toolholder is suited for internal threading applications in production and job-shop turning environments. The left-hand orientation and 1.15-inch minimum bore diameter make it appropriate for threading medium-to-large bore diameters on ferrous and non-ferrous workpieces. It is installed by machinists and CNC operators in shops running repetitive threading programs where indexable insert tooling reduces downtime compared to ground tooling. The Snap Tap series is oriented toward rigid, repeatable setups in high-cycle production turning.

Key Features

• Internal left-hand threading orientation for bore threading operations
• Coolant-through design for improved chip control and insert longevity
• Clamp-style insert retention with 16NL insert compatibility
• CN toolholder style with 3/8-inch inscribed circle insert size
• Steel construction for rigidity and durability in production turning
• Part of the Snap Tap series for consistent, repeatable setups

Compatibility

Compatible with 16NL indexable threading inserts with a 3/8-inch inscribed circle. Designed as an OEM-style replacement or direct-fit toolholder for CN-style internal threading applications on CNC lathes and turning centers requiring a left-hand orientation.

Installation Notes

Installation is performed by machinists or CNC setup technicians. The machine spindle must be fully stopped and the machine locked out before mounting or indexing the toolholder. Verify that the boring bar is properly supported and that insert clamp torque follows the insert manufacturer's standard recommendations. Confirm coolant line connection and flow before running a threading cycle.