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The KENNAMETAL 1799588 is a carbide threading insert in the Top Notch series, designed for precision thread-cutting operations on metalworking lathes and CNC turning centers. Offered in the NTB3RB style with a KC5025 grade and PVD-applied TiAlN finish, this insert handles both internal and external American Buttress thread profiles across a pitch range of 8 to 16 TPI. The 45-degree included angle and 0.0065-inch corner radius deliver consistent thread geometry. Right-hand cutting orientation and a compact insert size 3 form factor make it a reliable choice for production and job-shop threading applications.
This insert is suited for threading American Buttress profiles in both internal and external configurations. The KC5025 grade with TiAlN coating is well matched to a broad range of ferrous and non-ferrous workpiece materials, covering material grades C2 and C6. Typical installations include precision lathe work and CNC turning programs where repeatable thread form and tool life are critical. It is sold individually but carries a minimum order quantity of 5 units per order.
Designed as an OEM-style replacement threading insert for Top Notch series toolholders accepting size 3 NTB-style inserts. Verify toolholder seat geometry and insert pocket dimensions before installation.
Threading inserts of this type are installed and changed by machinists or CNC tooling technicians following standard lathe and turning center lockout procedures. Ensure the machine spindle is fully stopped and all drives are de-energized before seating or replacing the insert. Use the appropriate Top Notch clamping hardware and torque the clamp screw according to the toolholder manufacturer specifications. Inspect the insert pocket for debris or wear before seating a new insert to maintain thread-form accuracy.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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