Allied Machine 151T-0024 Spade Drill Insert 3/4 in Cobalt Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 151T-0024 is a spade drill insert designed for high-performance drilling in ferrous and exotic workpiece materials. Built from T15-grade cobalt steel, this insert features a 132-degree point angle and a physical vapor deposition (PVD) TiN coating that improves surface hardness and wear resistance at the cutting edge. It fits Seat Size 1 holders in the T-A series spade drill system. At 0.1563 inches thick and sized for a 3/4-inch bore diameter, it is a direct-fit replacement insert for production and maintenance drilling operations. Machinists, toolroom technicians, and CNC operators are the primary users of this insert.

This insert is suited for drilling steel, stainless steel, cast iron, superalloys, and titanium — covering ISO material groups P, M, K, and S. It fits T-A series spade drill holders configured for Seat Size 1 and a 3/4-inch cutting diameter. Typical applications include general production drilling, structural fabrication, and aerospace or heavy-equipment manufacturing where tool life and dimensional accuracy in hard materials are priorities. It is sold individually.

Key Features

• T15 cobalt material grade provides high heat resistance and toughness in difficult-to-machine alloys
• TiN PVD coating extends cutting edge life and reduces built-up edge in steel and stainless applications
• 132-degree point angle improves chip formation and reduces thrust force on entry
• Fractional inch system — 3/4-inch diameter, Seat Size 1, fits standard T-A series holders
• Sold as a single insert (Pkg Qty 1), minimizing over-ordering for toolroom stock

Compatibility

Designed for use with T-A series spade drill holders requiring a Seat Size 1 insert at 3/4-inch cutting diameter. Compatible primary workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium (ISO codes P, M, K, S).

Installation Notes

Insert seating and clamping should be performed by a qualified machinist or toolroom technician following the holder manufacturer's torque and clamping procedures. Ensure the spindle is fully stopped and the machine is locked out before changing inserts. Inspect the insert seat for chips or debris before seating the new insert, as contamination can cause premature insert failure or dimensional error. Always verify the insert is fully seated and the clamping screw is properly torqued before resuming cutting operations.