Description

The SECO 00012756 is a right-hand MSRN-style negative rake indexable turning toolholder designed for general-purpose lathe work across a wide range of workpiece materials. It features a 1.25-inch by 1.25-inch square shank, an overall length of 6 inches, and a 15-degree lead angle. The holder uses a clamp-and-pin locking system to secure SN..64. series negative rake inserts with a 0.75-inch inscribed circle. Built from steel, it is suited for production turning environments where insert indexability and rigid tool holding are required. Machinists and toolroom professionals are the primary installers.

This toolholder is intended for right-hand cutting direction on CNC and manual lathes performing external turning operations. It accepts SN..64. inserts, compatible insert size code SN64, and is rated for universal primary workpiece material categories including H, K, M, N, P, and S material groups. That broad material compatibility makes it appropriate for turning steel, cast iron, non-ferrous alloys, superalloys, and similar materials in both job-shop and production settings. It is not configured for coolant-through delivery.

Key Features

MSRN toolholder style with negative rake angle of -6 degrees for strong cutting-edge support
Right-hand cutting direction with 15-degree lead angle
Clamp and pin insert holding method for secure, repeatable indexing
Accepts SN..64. series inserts with 0.75-inch inscribed circle
1.25-inch by 1.25-inch square shank, 6-inch overall length
Steel construction for rigidity in production turning applications
Compatible with universal material groups H, K, M, N, P, and S

Compatibility

Designed to accept SN..64. series negative rake indexable inserts with compatible insert size code SN64 and a 0.75-inch inscribed circle, suitable for right-hand external turning on CNC and manual lathes.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the lathe spindle is fully stopped and the machine is locked out before mounting or adjusting the toolholder. Secure the shank firmly in the tool post or turret to the machine manufacturer’s specified clamping procedure. Verify insert seating and clamp torque per the insert manufacturer’s guidelines before initiating a cut.