Allied Machine 451H-18 Spade Drill Insert 18mm Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 451H-18 is a cobalt spade drill insert designed for high-performance hole-making in demanding metalworking applications. Sized at 18.00 mm in diameter with a 132-degree point angle, this insert is manufactured from Super Cobalt and carries an AM200 PVD coating for extended tool life and heat resistance. It belongs to the GEN2 T-A series, a platform recognized in the machining trade for modular spade drill tooling. Machinists, toolroom technicians, and production floor operators installing or replacing inserts in compatible T-A spade drill holders will find this a direct fit for the Seat Size 1 holder body.

This insert is suited for cutting steel, stainless steel, cast iron, superalloys, titanium, and hard materials, covering ISO workpiece material codes P, M, K, S, and H. It is commonly used in CNC machining centers, manual lathes, and drill press setups across general manufacturing, aerospace, oil and gas, and heavy equipment industries. The AM200 PVD coating reduces built-up edge and improves performance in interrupted cuts and abrasive materials. The 18.00 mm diameter makes it appropriate for medium-diameter hole applications where a replaceable insert system offers cost and cycle-time advantages over solid drills.

Key Features

• 18.00 mm cutting diameter with a 132-degree point angle for reduced thrust and accurate entry
• Super Cobalt insert material for improved toughness and heat resistance versus standard HSS
• AM200 PVD coating classification for extended wear life across multiple workpiece materials
• GEN2 T-A series platform — Seat Size 1 for compatibility with corresponding T-A holder bodies
• Rated for ISO material groups P, M, K, S, and H including stainless steel, cast iron, and superalloys
• Metric measurement system; thickness of 0.1563 inches

Compatibility

Designed for use with GEN2 T-A series spade drill holders accepting a Seat Size 1 insert. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, titanium, and hard materials as designated by ISO codes P, M, K, S, and H.

Installation Notes

Insert replacement should be performed by a qualified machinist or toolroom technician with the spindle fully stopped and the machine locked out per applicable safety procedures. Use the correct T-A insert key or torx driver specified for the holder to seat the insert fully and evenly — do not overtighten or use impact tools. Inspect the holder pocket for damage or debris before seating a new insert. Handle cobalt inserts carefully to avoid chipping the cutting edge during installation.