Allied Machine 10284-0408 Spade Drill Insert 4-1/4 in Seat H

Product Description

The ALLIED MACHINE AND ENGINEERING 10284-0408 is a spade drill insert designed for large-diameter drilling operations in metalworking and machining applications. Manufactured from CPM-M4 powdered metal, this insert measures 4-1/4 inches in diameter and features a 130-degree point angle optimized for efficient chip formation and accurate hole entry. The uncoated finish makes it well-suited for applications where the base material properties of M4 high-speed steel are the preferred cutting characteristics. At 0.6875 inches thick and 3-11/16 inches in height, the insert fits Seat Size H spade drill holders and is typically installed and serviced by machinists and tool-and-die professionals.

This insert is applied in heavy-material-removal drilling operations where large-diameter holes are required in a single pass. Compatible workpiece materials include steel, cast iron, and non-ferrous metals, covering ISO material groups P, N, and K. It is commonly used in production machining environments, job shops, and industrial manufacturing facilities where spade drill tooling is the preferred method for deep or large-bore hole generation. The insert replaces or supplements tooling in existing Seat Size H spade drill bodies.

Key Features

• 4-1/4 inch cutting diameter for large-bore hole generation in a single pass
• CPM-M4 powdered metal construction for improved wear resistance and toughness over conventional M4 high-speed steel
• 130-degree point angle supports stable cutting entry and reduced thrust in steel and cast iron
• Uncoated finish compatible with a wide range of cutting fluids and application-specific coatings as needed
• Seat Size H interface for direct fitment into matching spade drill bodies without modification
• Rated for steel, cast iron, and non-ferrous metal workpiece materials

Compatibility

Designed for use with Seat Size H spade drill holders. Compatible workpiece materials include steel, cast iron, and non-ferrous metals (ISO material groups P, N, and K).

Installation Notes

Installation is performed by qualified machinists following standard toolroom practices. Ensure the spindle is fully powered down and the machine is locked out before inserting or removing the spade drill insert. Seat the insert securely in the Seat Size H holder pocket and torque the clamping screw according to the drill body manufacturer specifications. Verify insert seating and runout before initiating a cut.