Allied Machine 181T-0024 Spade Drill Insert 3/4 in Cobalt Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 181T-0024 is a cobalt spade drill insert designed for high-performance hole-making in demanding machining applications. This T-A Series insert features a 132-degree point angle and a TiN (titanium nitride) PVD coating that reduces friction and extends cutting life. At 3/4 inch diameter and 0.1563 inches thick, it fits Seat Size 1 T-A Series holders. The cobalt substrate provides heat resistance and toughness beyond standard HSS, making it suitable for production drilling in tough materials. Machinists and tool-crib personnel working in job shops, production facilities, and maintenance environments will find this insert a direct fit for T-A Series drill bodies.

The 181T-0024 is rated for use across a broad range of workpiece materials including steel, stainless steel, cast iron, super-alloys, titanium, and hard materials. This coverage spans ISO material codes P, M, K, S, and H, making it a versatile insert for shops that run mixed-material jobs. It is suited to CNC machining centers, manual drill presses, and lathe turrets where T-A Series spade drill holders are already in use. The TiN coating improves surface hardness and chip evacuation compared to uncoated cobalt, which helps maintain consistent hole quality over longer run intervals.

Key Features

• Cobalt insert material resists heat and wear in high-feed drilling applications
• TiN PVD coating reduces friction and extends cutting edge life
• 132-degree point angle suited for a wide range of workpiece materials including steel and stainless steel
• 3/4 inch diameter, 0.1563 inches thick, Seat Size 1 for direct T-A Series holder compatibility
• Rated for ISO material groups P, M, K, S, and H workpiece materials
• Sold individually, no minimum order quantity above one unit

Compatibility

Designed for use with T-A Series Seat Size 1 spade drill holders. Compatible workpiece materials include steel, stainless steel, cast iron, super-alloys, titanium, and hard materials as specified by the manufacturer.

Installation Notes

Installation and indexing of spade drill inserts should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before removing or seating the insert. Use the appropriate T-A Series insert screw and torque it with the manufacturer-specified driver to ensure the insert seats flush against the holder pocket. Inspect the pocket for chips or damage before installing a new insert, as debris under the insert can cause premature failure or dimensional error.