Allied Machine 150N-0021 Spade Drill Insert 21/32 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 150N-0021 is a cobalt spade drill insert designed for high-performance hole-making in demanding metal-cutting applications. Part of the T-A Series, this insert measures 21/32 inches in diameter and features a 132-degree point angle for accurate entry and reduced thrust. The TiCN (Titanium Carbonitride) coating is applied via PVD process, providing increased surface hardness and improved wear resistance. At 0.125 inches thick and weighing 0.1 pounds, the insert fits a Seat Size 0 holder. Licensed machinists and tool-and-die professionals are the primary installers of this type of tooling.

This insert is suited for drilling into a broad range of workpiece materials including steel, stainless steel, cast iron, super-alloys, and titanium. The T-A Series platform is a widely adopted indexable spade drill system used in CNC machining centers, manual lathes, and drill presses across production, job shop, and maintenance environments. The 132-degree point geometry performs well in interrupted cuts and on curved or angled entry surfaces common in those materials.

Key Features

• 21/32 inch diameter, Seat Size 0 for T-A Series holders
• 132-degree point angle for accurate entry and reduced axial thrust
• Cobalt substrate provides toughness in tough and abrasive workpiece materials
• TiCN PVD coating increases surface hardness and extends tool life
• Rated for steel, stainless steel, cast iron, super-alloys, and titanium (ISO material codes P, M, K, S)
• 0.125 inch insert thickness for Seat Size 0 compatibility

Compatibility

Designed as an OEM-style replacement insert for T-A Series Seat Size 0 spade drill holders. Consult holder documentation to confirm seat size and insert diameter before ordering.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before seating or removing the insert. Use the correct insert screw and torque driver specified by the holder manufacturer — do not substitute fasteners. Inspect the holder seat for debris or wear before installing a new insert, as a damaged seat will affect runout and tool life.