Allied Machine 436T-0304 Spade Drill Insert 3-1/8 in Hss Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 436T-0304 is a spade drill insert designed for high-feed, high-volume drilling operations in industrial machining environments. Part of the GEN2 T-A series, this insert measures 3-1/8 inches in diameter with a 144-degree point angle and a thickness of 0.4375 inches. It is manufactured from M4 grade high speed steel and features a PVD-applied TiN coating for improved wear resistance and heat management. Seat size 6 designates the matching holder body required for installation. This insert is installed by machinists and tool-and-die professionals in production drilling setups on vertical mills, drill presses, and CNC machining centers.

The 436T-0304 is suited for drilling applications in steel, cast iron, and non-ferrous metals, covering ISO workpiece material codes P, K, and N. The GEN2 T-A series is a common platform in production shops handling deep-hole and through-hole drilling where replaceable insert geometry reduces tooling cost compared to solid drill replacement. It is a direct-replacement insert that seats into compatible T-A series holder bodies sized for seat size 6. Typical applications include structural fabrication, heavy equipment manufacturing, and job shop production drilling.

Key Features

• 3-1/8 inch diameter with 144-degree point angle for aggressive chip formation in ferrous and non-ferrous materials
• M4 grade high speed steel substrate provides toughness in interrupted and continuous cuts
• PVD TiN coating reduces friction and extends edge life in steel and cast iron
• GEN2 T-A series platform — indexes into seat size 6 holder bodies for repeatable runout
• 0.4375 inch insert thickness for rigid seating in compatible holder
• Single-insert package quantity suitable for field replacement or tool crib restocking

Compatibility

Designed for use with GEN2 T-A series spade drill holder bodies requiring a seat size 6 insert. Compatible primary workpiece materials include steel (P), cast iron (K), and non-ferrous metals (N) per ISO material classification.

Installation Notes

Installation and replacement of spade drill inserts should be performed by qualified machinists following the machine tool manufacturer lockout and tagout procedures before changing tooling. The insert must be seated fully and secured per the holder manufacturer torque specifications provided with the holder body — do not estimate fastener torque. Inspect the holder seat and clamping screw for wear or damage before installing a new insert. Verify spindle runout after mounting before returning the tool to production use.