Allied Machine 451H-22-HE Spade Drill Insert 22mm Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 451H-22-HE is a 22 mm diameter spade drill insert designed for high-performance drilling in demanding production environments. Built from cobalt high-speed steel and finished with an AM200 PVD coating, this insert delivers extended tool life and thermal resistance in tough cutting applications. With a 132-degree point angle and Seat Size 1 classification, it fits directly into compatible GEN2 T-A spade drill holders. Licensed machinists and tooling technicians install this insert as a replacement or production-run consumable in CNC turning centers, machining centers, and drill presses running at production feed and speed rates.

This insert is rated for use across a broad range of primary workpiece materials including steel, stainless steel, cast iron, super-alloys, titanium, and hard materials — covering ISO material codes P, M, K, S, and H. It is well suited for both through-hole and blind-hole drilling operations in high-volume manufacturing, aerospace, automotive, and general metalworking shops where consistent hole quality and insert longevity are priorities. The AM200 PVD coating provides a hard, low-friction surface layer that reduces built-up edge and extends cutting performance between tool changes.

Key Features

• 22 mm cutting diameter with 132-degree point angle for aggressive chip formation and accurate entry
• Cobalt substrate provides toughness and heat resistance beyond standard HSS inserts
• AM200 PVD coating reduces friction, resists crater wear, and extends tool life in abrasive materials
• Seat Size 1 — compatible with GEN2 T-A spade drill holder bodies
• Rated for steel, stainless steel, cast iron, super-alloys, titanium, and hard materials (ISO P, M, K, S, H)
• Sold individually — direct drop-in replacement for production tooling changeouts

Compatibility

Designed for use with GEN2 T-A series Seat Size 1 spade drill holders. Verify holder seat size and series designation before installation. No additional compatible model numbers were specified in the product data.

Installation Notes

Insert replacement is performed by qualified machinists or toolroom technicians. Always power down and lock out the machine spindle before removing or seating a drill insert. Seat the insert fully and evenly in the holder pocket and secure with the manufacturer-specified clamping screw — do not overtighten with impact tools. Inspect the holder pocket for chips, burrs, or wear before installing a new insert, as pocket damage will affect runout and hole quality.