Kennametal 1743831 Threading Insert 60 Deg 48-8 Tpi

Product Description

The KENNAMETAL 1743831 is a solid carbide laydown threading insert designed for left-hand internal threading operations. Manufactured to the LT16NL insert style and coated with TiAlN via a PVD process, this insert carries the KC5025 grade designation, which is engineered for tough threading applications requiring wear resistance and edge stability. The insert covers a pitch range of 0.50 to 3.00 mm (48 to 8 TPI) and conforms to a partial profile 60-degree thread standard. With a 3/8 inch (9.53 mm) inscribed circle and a thickness of 0.1430 inch (3.44 mm), it seats securely in compatible LT16NL toolholders used in CNC turning and threading operations.

This insert is suited for internal threading on CNC lathes in metalworking environments, including both job shop and production floor settings. The left-hand orientation makes it appropriate for reverse-thread applications or left-hand spindle configurations. Machinists and tooling specialists working on threaded bores in ferrous and non-ferrous materials will find this insert applicable across a broad pitch range, eliminating the need to swap inserts for fine and coarse threads within the 48-8 TPI span. The partial profile geometry allows it to cut most standard 60-degree thread forms without requiring a dedicated insert per pitch.

Key Features

• KC5025 carbide grade with TiAlN PVD coating for wear resistance in threading applications
• Partial profile 60-degree thread standard covers 48-8 TPI (0.50-3.00 mm pitch) in a single insert
• Left-hand internal threading orientation for reverse-thread bores and left-hand spindle setups
• LT16NL insert style with 3/8 inch inscribed circle for positive seating in matching toolholders
• Corner radius of 0.0020 inch (0.05 mm) for precise thread root definition
• Hole diameter of 0.1551 inch (3.94 mm) for secure clamping in the toolholder pocket

Compatibility

Designed as a replacement-style threading insert for toolholders accepting the LT16NL insert style with a 3/8 inch inscribed circle. Consult the toolholder manufacturer specifications to confirm seating and clamping compatibility before installation.

Installation Notes

This insert should be installed by a qualified machinist or tooling technician. Power down and lock out the machine before handling or replacing inserts. Use the appropriate torx or clamping screw torque recommended by the toolholder manufacturer — do not overtighten, as carbide inserts are brittle and can fracture under uneven clamping force. Inspect the toolholder pocket for chips or debris before seating the insert to ensure full contact and accurate positioning.