Allied Machine 1C21A-0026 Spade Drill Insert 13/16 in Carbide

Product Description

The ALLIED MACHINE AND ENGINEERING 1C21A-0026 is a solid carbide spade drill insert designed for high-performance hole-making in demanding materials. Part of the T-A series, this insert measures 13/16 inches in diameter and features a 132-degree point angle for controlled entry and accurate hole geometry. The TiAlN PVD coating provides thermal resistance and extended tool life in abrasive cutting environments. Manufactured to Manufacturer Grade C2 (K20), it is suited for shops and machinists requiring consistent, repeatable drilling performance across short-run and production applications. The insert weighs approximately 0.1 pounds.

This insert is intended for use with compatible T-A series spade drill holders in CNC machining centers, lathes, and drilling machines. It is rated for primary workpiece materials including stainless steel, cast iron, non-ferrous metals, and super-alloys and titanium — covering a broad range of industrial and precision manufacturing scenarios. Seat Size 1 designates the holder interface, so correct holder selection is required before installation. Machinists working in aerospace, general metalworking, and job-shop environments will find this insert applicable across a wide range of common workpiece materials.

Key Features

• 13/16 inch diameter solid carbide construction for rigidity and wear resistance
• 132-degree point angle for accurate hole entry and reduced thrust
• TiAlN PVD coating enhances thermal hardness and extends tool life in high-temperature cuts
• C2 (K20) manufacturer grade suited for cast iron, non-ferrous metals, and super-alloys
• T-A series Seat Size 1 interface for use with compatible Allied Machine holders
• Rated for stainless steel, cast iron, non-ferrous metals, super-alloys, and titanium workpieces

Compatibility

Designed for use with T-A series spade drill holders requiring a Seat Size 1 insert. Compatible primary workpiece materials include stainless steel, cast iron, non-ferrous metals, super-alloys, and titanium (material codes M, K, N, S).

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Ensure the spade drill holder is removed from the spindle and fully de-energized 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 seat pocket for chips or damage before installing a new insert to ensure proper seating and runout control.