Allied Machine 451H-18.5 Spade Drill Insert 18.5mm Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 451H-18.5 is a cobalt spade drill insert engineered for high-performance hole-making in demanding production environments. Sized at 18.5 mm in diameter with a Seat Size 1 designation, this insert features a 132-degree point angle and an AM200 PVD coating that extends tool life when cutting through abrasive and hard materials. At 0.1563 inches thick, it mounts into compatible GEN2 T-A series spade drill holders. Machinists and toolroom technicians specify this insert for applications where heat resistance, edge retention, and consistent hole geometry are critical to cycle time and part quality.

This insert is designed for use in CNC machining centers, lathes with live tooling, and dedicated drilling equipment across job shop and production floor environments. Its cobalt substrate and AM200 PVD coating make it well suited for interrupted cuts and work-hardening materials. The GEN2 T-A series platform is widely used in aerospace, energy, automotive, and general metalworking applications where repeatable, accurate drilling is required without frequent insert changes.

Key Features

• 18.5 mm cutting diameter with Seat Size 1 for direct holder compatibility
• Cobalt insert material provides improved heat and wear resistance over standard HSS
• AM200 PVD coating reduces friction and extends tool life in hard and abrasive workpiece materials
• 132-degree point angle optimized for steel, stainless steel, cast iron, super-alloys, titanium, and hard materials
• 0.1563-inch insert thickness fits the GEN2 T-A series holder platform
• Single-piece packaging with a minimum order quantity of 1 for flexible procurement

Compatibility

Designed for use with GEN2 T-A series spade drill holders from Allied Machine and Engineering, Seat Size 1. Rated for primary workpiece material codes P, M, K, S, and H, covering steel, stainless steel, cast iron, super-alloys and titanium, and hard materials.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Before seating or replacing the insert, de-energize the machine and confirm all spindle motion has stopped. Use the appropriate torx or insert-retention screw driver specified for the GEN2 T-A holder to secure the insert to the correct clamping torque per the holder manufacturer documentation. Inspect the insert seat and clamping surfaces for chips or debris before seating the new insert to ensure accurate location and prevent premature insert failure.