Kennametal 1281803 Threading Toolholder External Right Hand

Product Description

The KENNAMETAL 1281803 is an external, right-hand indexable threading toolholder designed for precision thread-turning operations on CNC lathes and turning centers. Built in the LSAS toolholder style, it accepts LT 16ER threading inserts secured by a clamp-style holding method. The shank measures 1.0 inch wide by 1.0 inch tall (25.40 mm x 25.40 mm), with an overall length of 6.0 inches (152.40 mm) and a head length of 1.2 inches (30.48 mm). The insert inscribed circle is 3/8 inch. This toolholder is installed by machinists and CNC turning specialists performing external thread cutting on ferrous and non-ferrous workpieces.

The 1281803 is suited for external threading applications in production and job-shop turning environments. It is compatible with LT 16ER series threading inserts, making it a direct fit for operations requiring consistent thread form and insert repeatability. The right-hand orientation and square shank format make it appropriate for standard OD turning tool stations on most CNC lathes. It does not include coolant-through capability, so it is best matched to applications where flood or mist coolant is applied externally. Typical users include machining centers running medium to high production threading cycles on components such as fasteners, fittings, and threaded shafts.

Key Features

• External, right-hand threading orientation for OD thread-turning operations
• LSAS toolholder style with clamp-type insert holding for secure, repeatable insert seating
• Accepts LT 16ER indexable threading inserts with a 3/8-inch inscribed circle
• Square shank profile: 1.0 inch x 1.0 inch (25.40 mm x 25.40 mm) for standard turret mounting
• 6.0-inch overall length (152.40 mm) with a 1.2-inch head length (30.48 mm)
• Back of bar to cutting edge: 1.0 inch (25.40 mm) for predictable tool offset setup

Compatibility

Designed for use with LT 16ER series indexable threading inserts. This toolholder follows the LSAS style designation and is referenced under manufacturer series LT Threading. Verify turret pocket size and insert series compatibility before installation.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine before mounting or removing the toolholder from the turret. Ensure the turret pocket matches the 1.0-inch x 1.0-inch shank dimensions and that the insert seat and clamp are free of debris before seating the LT 16ER insert. Torque all clamping screws according to the machine tool manufacturer specifications, not estimates, and confirm tool offset values at the control before running the first part.