Sandvik Coromant 5781833 Threading Insert 10 Tpi Un

Product Description

The SANDVIK COROMANT 5781833 is a laydown threading insert engineered for left-hand external UN thread cutting. Part of the CoroThread 266 series, it is manufactured from solid carbide and carries a PVD-applied TiCrAlN/TiAlN dual-layer coating for wear resistance and tool life in threading operations. The insert produces a 60-degree included angle at 10 threads per inch (TPI) and fits a 3/8 inch (9.53 mm) inscribed circle. It measures 5/32 inch (0.1563 inch decimal) thick. Chipbreaker style is A. This insert is sized for use with compatible CoroThread 266 toolholders and is installed by machinists and toolroom technicians on CNC lathes and threading equipment.

This insert is suited for single-point external threading on lathes and turning centers where left-hand UN thread forms are required. At 10 TPI, it covers common unified national thread sizes on fasteners, mechanical components, and threaded fittings. The solid carbide substrate with PVD coating supports threading in a range of materials including steels and alloys. This insert is sold individually with a minimum order quantity of 10 units per purchase. It is appropriate for production and maintenance machining environments.

Key Features

• Left-hand external UN thread form at 60-degree included angle
• 10 TPI thread pitch for unified national thread cutting
• Solid carbide substrate with PVD TiCrAlN/TiAlN dual coating for wear resistance
• 3/8 inch (9.53 mm) inscribed circle, 0.1563 inch (3.97 mm) thick
• Chipbreaker style A for controlled chip management during threading
• CoroThread 266 series insert style 266, insert size code 16

Compatibility

Designed for use with CoroThread 266 series toolholders accepting a size 16 laydown threading insert with a 0.1732 inch (4.40 mm) hole diameter. Verify toolholder hand and insert pocket specifications before installation.

Installation Notes

This insert is installed by qualified machinists or toolroom technicians. Power down and lock out the machine before changing inserts. Use the appropriate torx or clamping wrench for the toolholder pocket to seat the insert fully and evenly. Do not exceed the recommended depth of cut or feed rate for the toolholder and workpiece material combination.