Kennametal 1017338 Grooving Insert NB3 K68 Solid Carbide

Product Description

The KENNAMETAL 1017338 is a solid carbide grooving insert designed for external grooving and turning operations on CNC lathes and turning centers. Part of the Top Notch series, this uncoated K68-grade carbide insert delivers a cutting width of 0.1949 inches (4.95 mm) and an insert height of 0.3440 inches. The right-hand orientation and NB3 insert style make it suited for precision grooving where tight dimensional tolerances are required. Machinists and CNC operators select this insert for its bright, uncoated surface finish, which suits specific material and speed combinations where coatings are not preferred.

This insert is intended for use in compatible Top Notch series grooving toolholders accepting NB3-style inserts. Typical applications include grooving, recessing, and light turning on ferrous and non-ferrous materials in production and job-shop environments. The K68 carbide grade is formulated for applications requiring high hardness and wear resistance. This insert is sold individually but is subject to a minimum order quantity of 5 units per order.

Key Features

• Solid carbide K68 grade with bright, uncoated finish for demanding grooving applications
• Cutting width of 0.1949 inches (4.95 mm) for precise groove sizing
• Right-hand cutting orientation, NB3 insert style
• Insert height of 0.3440 inches for secure seating in Top Notch toolholders
• Included angle of 55 degrees for controlled chip geometry
• Part of the Top Notch series, a widely used grooving system in CNC turning

Compatibility

Designed for use with Top Notch series grooving toolholders accepting NB3-style inserts. The MSC and manufacturer reference number for this insert style is NB3R/L.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Always power down and lock out the machine before changing inserts. Ensure the toolholder pocket is clean and free of debris before seating the insert to maintain proper cutting geometry. Follow the toolholder manufacturer torque recommendations for the clamping screw to avoid insert movement or fracture during operation.