Sandvik Coromant 5757984 Threading Insert Solid Carbide

Product Description

The SANDVIK COROMANT 5757984 is a solid carbide laydown threading insert from the CoroThread 266 series, designed for right-hand internal threading operations. It carries a dual PVD coating of TiAlN and TiCrAlN for extended wear resistance and thermal stability at the cutting edge. The insert produces Metric 60-degree threads at a 1.50 mm pitch and features an inscribed circle of 0.375 inches (9.53 mm) with a thickness of 0.1563 inches (3.97 mm). Manufacturer grade 1125 indicates a tough carbide substrate suited to a range of ferrous and non-ferrous workpiece materials. Licensed machinists and CNC lathe operators install this insert in compatible CoroThread 266 toolholders on CNC turning centers.

This insert is suited for internal threading on CNC turning centers in both production and job-shop environments. Its right-hand orientation and Metric 60-degree thread standard make it a standard choice for metric fastener thread forms in precision machining applications. The chipbreaker designation A and single tooth-per-side configuration support consistent chip control in through-bore and blind-bore threading cycles. It is appropriate for light-to-medium threading passes on steel, stainless, and similar materials where a PVD-coated carbide grade is specified.

Key Features

• Solid carbide substrate with dual PVD coating: TiAlN and TiCrAlN for heat and wear resistance
• Right-hand internal Metric 60-degree thread form at 1.50 mm pitch
• Inscribed circle of 0.375 inches (9.53 mm); thickness of 0.1563 inches (3.97 mm)
• Manufacturer grade 1125 for balanced toughness and wear performance
• Chipbreaker style A for controlled chip evacuation in internal threading
• Part of the CoroThread 266 series for use with compatible 266-series toolholders

Compatibility

Designed for use with SANDVIK COROMANT CoroThread 266 series toolholders that accept the 16 insert size code. The manufacturers catalog number for this insert is 266RL-16MM01A150M 1125. Verify toolholder seat geometry and clamping specifications before installation.

Installation Notes

Installation and replacement of threading inserts should be performed by a qualified machinist with the machine in a full stop and lockout/tagout procedures in place per applicable shop safety standards. Use the correct torx or hex key specified for the CoroThread 266 clamping screw to seat the insert securely without over-torquing the clamp. Inspect the insert seat and clamping components for chips or debris before seating the new insert. Verify thread pitch and hand orientation against the workpiece drawing before initiating the threading cycle.