Allied Machine 10254-0308 Spade Drill Insert 3-1/4 in Seat E

Product Description

The ALLIED MACHINE AND ENGINEERING 10254-0308 is a spade drill insert designed for high-performance hole-making in metalworking and machining applications. Manufactured from CPM-M4 powdered metal, this insert delivers the wear resistance and edge retention required for drilling steel, cast iron, and non-ferrous metals. The 130-degree point angle suits general-purpose drilling across a wide range of workpiece materials. With a 3-1/4 inch diameter and Seat Size E designation, the insert seats directly into compatible Allied spade drill holders. The uncoated finish makes it suitable for applications where coating is not required or where the insert will be used with specific cutting fluids. Machinists and tool-room professionals install this insert as a replaceable cutting element, keeping tooling costs manageable without replacing the full holder assembly.

This insert is intended for use in drilling operations on steel, cast iron, and non-ferrous metal workpieces in manufacturing, job shop, and production machining environments. The Seat Size E classification aligns it with Allied Machine Seat Size E spade drill holders. Typical applications include large-diameter through-hole and blind-hole drilling on CNC machining centers, drill presses, and horizontal boring mills where a 3-1/4 inch bore diameter is required. The CPM-M4 grade is particularly well suited for interrupted cuts and abrasive materials where standard high-speed steel inserts wear prematurely.

Key Features

• 3-1/4 inch diameter for large-bore drilling applications
• CPM-M4 powdered metal construction for enhanced wear resistance and toughness
• 130-degree point angle for general-purpose drilling across steel, cast iron, and non-ferrous metals
• Seat Size E designation for direct fit into compatible Allied spade drill holders
• Uncoated finish compatible with a broad range of cutting fluid chemistries
• Replaceable insert design reduces tooling cost compared to solid drill replacement

Compatibility

Designed for use with Allied Machine and Engineering Seat Size E spade drill holders accepting a 3-1/4 inch diameter insert. Compatible primary workpiece materials include steel, cast iron, and non-ferrous metals as indicated by material codes P, K, and N.

Installation Notes

Installation and replacement of spade drill inserts should be performed by a qualified machinist or tooling technician with the machine fully powered down and the spindle locked. Use the appropriate insert seating tool or torque wrench as specified by the holder manufacturer to secure the insert without overtightening or distorting the seat. Inspect the holder seat for chips, burrs, or damage before installing a new insert. Follow applicable shop safety procedures and machine tool manufacturer guidelines during all tooling changes.