Kennametal 1097258 Indexable Threading Toolholder Left Hand

Product Description

The KENNAMETAL 1097258 is an external, left-hand indexable threading toolholder designed for precision threading and grooving operations on CNC lathes and turning centers. Part of the Top Notch series, this toolholder accepts N.3L inserts secured with a clamp-style holding method for rigid, repeatable positioning under cutting loads. The shank measures 1.25 x 1.25 inches square, with an overall length of 6 inches. Maximum depth of cut reaches 0.21 inches (5.33 mm). Machinists and toolroom technicians working in production turning environments will find this holder suited for both external thread cutting and grooving applications.

This toolholder is intended for external threading and grooving operations on turning equipment where a left-hand orientation is required. The Top Notch series is a common platform in production and job-shop lathe work, supporting interchangeable N.3L inserts across compatible setups. The clamp-style insert retention is well-suited to interrupted cuts and high-volume threading passes. Typical applications include threading ODs on steel, stainless, and alloy workpieces in both manual and CNC turning environments.

Key Features

• External threading and grooving capability in a single left-hand holder
• Top Notch series platform with N.3L insert compatibility
• Clamp-style insert holding method for secure, repeatable seating
• 1.25 x 1.25 inch square shank fits standard turning center tool blocks
• Maximum depth of cut of 0.21 inches (5.33 mm)
• Multi-use design supports both threading and grooving operations

Compatibility

Designed for use with N.3L series Top Notch inserts. Compatible with turning centers and CNC lathes equipped with tool blocks accepting a 1.25 x 1.25 inch square shank. No coolant-through capability; intended for external applications only.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Secure the toolholder firmly in the tool block or turret to the machine manufacturer's specified clamping torque before operation. Verify left-hand orientation and insert seating before initiating any cut. Always power down and lock out the machine before changing inserts or repositioning the holder.