Kennametal 1097254 Indexable Threading Toolholder 0.75in

Product Description

The KENNAMETAL 1097254 is an external, left-hand indexable threading toolholder designed for precision thread cutting and grooving operations on CNC lathes and manual turning centers. Built to the Top Notch series standard, it accepts N.2L inserts secured with a clamp-style holding method, providing rigid insert positioning during interrupted and continuous threading passes. The square shank measures 0.75 x 0.75 inches with an overall length of 4.5 inches. Maximum depth of cut is 0.138 inches, making it well suited for standard external thread profiles. This toolholder is installed and serviced by machinists, toolroom technicians, and CNC operators working in production and job-shop environments.

The 1097254 is applied to external threading and grooving operations on outside diameters where a left-hand holder orientation is required by the machine setup or part geometry. The Top Notch series toolholder platform is a common choice for shops running high-mix turning work that demands quick insert indexing without sacrificing repeatability. The clamp-style insert retention keeps the N.2L insert stable under moderate feed rates and varying material conditions. Typical applications include threading carbon steel, alloy steel, aluminum, and stainless on bar-fed and chuck-style turning machines.

Key Features

• External thread type with left-hand holder orientation for correct tool path alignment
• Accepts N.2L inserts with clamp-style holding for secure, repeatable insert seating
• Top Notch series toolholder style (NS) for compatibility within the Top Notch platform
• Maximum depth of cut of 0.138 inches suitable for standard external thread profiles
• Back-of-bar to cutting edge distance of 1.0 inch with center-to-cutting-edge offset of 0.35 inches
• Multi-use design supports both threading and grooving applications from a single holder

Compatibility

Designed for use with N.2L Top Notch series inserts on external threading and grooving applications. Specific machine or turret compatibility should be verified against the 0.75 x 0.75 inch square shank envelope and 4.5 inch overall length before installation.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before mounting, ensure the machine spindle is fully stopped, the turret is in the tool-change position, and all energy is locked out per established LOTO procedures. Seat the shank fully into the tool block or turret pocket and torque clamping screws evenly to the machine manufacturer's specification. Verify insert seating and confirm the cutting edge height and offset dimensions against the part program before initiating a cutting pass.