Allied Machine 456H-0304 Spade Drill Insert 3-1/8 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 456H-0304 is a cobalt spade drill insert designed for high-performance hole-making in demanding machining applications. Built to the GEN2 T-A series specification, this insert features a 144-degree point angle and an AM200 PVD coating that extends tool life when cutting through abrasive and hard-to-machine materials. The insert measures 3-1/8 inches in diameter with a seat size 6 designation, matching the corresponding GEN2 T-A spade drill holder. Machinists and tool-room technicians select this insert when they need consistent, repeatable performance in production drilling operations.

This insert is engineered for use across a broad range of primary workpiece materials, including steel, stainless steel, cast iron, super-alloys, titanium, and hard materials. It is suited to CNC machining centers, lathes with live tooling, and dedicated drill presses in both job-shop and production environments. The GEN2 T-A system indexes the insert into a replaceable-tip holder, eliminating the need to replace the full drill body and reducing per-hole tooling cost in high-volume runs.

Key Features

• 3-1/8 inch diameter with seat size 6 for precise holder fitment in the GEN2 T-A system
• Cobalt substrate delivers elevated heat and wear resistance versus standard HSS
• AM200 PVD coating classification improves lubricity and reduces built-up edge on ferrous and exotic materials
• 144-degree point angle geometry suited to flat-bottom entry and exit conditions
• Rated for steel, stainless steel, cast iron, super-alloys, titanium, and hard material workpieces
• 0.4375-inch thickness maintains rigidity across the full diameter during chip evacuation

Compatibility

Designed for use with ALLIED MACHINE AND ENGINEERING GEN2 T-A series seat size 6 spade drill holders. Verify holder seat size and diameter range before installation to confirm correct fitment.

Installation Notes

Installation is performed by qualified machinists or tool-crib technicians. Power down and lock out the spindle before seating or removing the insert. Use the manufacturer-specified torx or hex key to secure the insert screw to the holder; do not substitute non-rated fasteners. Inspect the holder seat for chips, burrs, or wear before each insert change to ensure proper seating and runout control.