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The ALLIED MACHINE AND ENGINEERING 451H-24 is a cobalt spade drill insert engineered for high-performance hole-making in demanding machining applications. Designed for the GEN2 T-A drilling system with a Seat Size 1 holder, this insert features a 132-degree point angle that promotes accurate entry and efficient chip evacuation. The AM200 PVD coating adds wear resistance and heat management at the cutting edge, extending tool life in production drilling environments. At 0.1563 inches thick and a nominal diameter of 24 mm, this insert delivers consistent performance where dimensional accuracy and surface integrity are critical. It is installed and changed out by machinists and CNC tooling technicians.
This insert is suited for use in vertical machining centers, horizontal machining centers, and manual drilling setups where the GEN2 T-A spade drill body accepts a Seat Size 1 insert. Primary workpiece materials include steel, stainless steel, cast iron, super-alloys, titanium, and hard materials. It is a direct replacement insert for worn or damaged tooling in production and job-shop environments running the GEN2 T-A platform.
Designed for use with ALLIED MACHINE AND ENGINEERING GEN2 T-A spade drill holders requiring a Seat Size 1 insert. Suitable for workpiece material classifications P (steel), M (stainless steel), K (cast iron), S (super-alloys and titanium), and H (hard material).
Insert changes should be performed with the machine powered down and the spindle fully stopped. Use the appropriate torque wrench and insert screw as specified by the GEN2 T-A holder manufacturer to secure the insert without over-tightening. Inspect the insert seat for chips or debris before seating the new insert to ensure proper contact and runout. Tooling changes on CNC equipment should follow applicable shop safety procedures and lockout/tagout protocols.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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