Kennametal 4175987 Threading Insert NTK3R KCU10 Carbide

Product Description

The KENNAMETAL 4175987 is a carbide threading insert in the Top Notch series, designed for cutting both internal and external threads on CNC lathes and manual turning centers. It carries the KCU10 grade with a PVD-applied AlTiN finish, which provides thermal resistance and edge wear protection during threading operations. The insert handles a partial profile 60-degree thread form in right-hand orientation. External pitch range covers 0.60 to 2.50 mm and 10 to 44 TPI. Internal pitch range covers 1.00 to 2.50 mm and 9 to 24 TPI. Machinists and CNC operators working in job shops, production turning cells, or maintenance machining environments use this insert for threading steel, stainless, and similar ferrous workpieces.

The 4175987 suits applications requiring partial profile threading across a wide pitch range without changing the insert. It fits Top Notch series toolholders designed for size 3 inserts. The 60-degree included angle makes it compatible with unified (UN), metric (M), and other standard 60-degree thread forms in both external and internal threading operations. Typical use cases include threading fastener features, hydraulic fittings, and mechanical assembly components on turning equipment in both residential and industrial maintenance shops.

Key Features

• KCU10 carbide grade with PVD AlTiN finish for extended edge life on ferrous materials
• Partial profile 60-degree thread form covers UN and metric thread standards from a single insert
• Wide external pitch range: 0.60 to 2.50 mm and 10 to 44 TPI
• Internal pitch range: 1.00 to 2.50 mm and 9 to 24 TPI
• Right-hand insert orientation for standard lathe threading passes
• Top Notch series insert size 3 with 0.08 mm corner radius for precise thread root geometry

Compatibility

Designed for use with Top Notch series insert size 3 toolholders accepting NTK-style inserts with a 60-degree partial profile geometry.

Installation Notes

Threading inserts are seated and secured by a machinist or CNC operator following the toolholder manufacturer's clamping procedure for Top Notch series holders. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque wrench per the toolholder manufacturer's specification when tightening the clamp screw. Inspect the insert pocket and clamp for wear or debris before seating a new insert to ensure proper support and repeatability.