Kennametal 1937540 Boring Insert KT315 Cermet Triangle

Product Description

The KENNAMETAL 1937540 is a cermet boring insert designed for precision internal turning and boring operations on CNC and manual lathes. Manufactured to the TDHB style in a 60-degree triangular shape, this insert carries the KT315 grade designation, a cermet formulation suited for finishing and semi-finishing passes on steel and cast iron. Key dimensions include a 5/32-inch inscribed circle, a 3/64-inch thickness, and a 1/64-inch corner radius. The 15-degree relief angle supports reduced cutting edge contact and is appropriate for light to medium chip loads. Machinists and toolroom technicians working with boring bars sized for this insert geometry will find it a direct fit for precision diameter work.

This insert is applied in internal boring operations where tight tolerances and good surface finish are priorities. Cermet grade KT315 performs well at moderate to high cutting speeds on steel and nodular iron, particularly in finishing applications where edge sharpness and wear resistance matter. Material grades C3, C7, and C8 are associated with this insert, indicating suitability across a range of steel and cast-iron workpieces. It is sold individually per package, with a minimum order quantity of 5 units.

Key Features

• 60-degree triangular insert shape (TDHB style) for internal boring applications
• KT315 cermet grade engineered for steel and cast-iron finishing cuts
• 1/64-inch corner radius for tight-radius bores and fine surface finish
• 15-degree relief angle reduces flank contact and supports light chip loads
• 5/32-inch inscribed circle and 3/64-inch thickness for compact boring bar fitment
• Material grades C3, C7, and C8 cover a broad range of workpiece materials

Compatibility

Designed for use in TDHB-style boring bar pockets accepting a triangular insert with a 5/32-inch inscribed circle, 3/64-inch thickness, and 0.095-inch hole diameter. Confirm pocket geometry and insert seat dimensions before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before changing inserts. Seat the insert firmly against all pocket locating surfaces and torque the clamping screw to the boring bar manufacturer's specification. Inspect the insert seat and clamping hardware for wear or debris before seating a new insert.