Allied Machine 181A-0029-HI Spade Drill Insert 29/32 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 181A-0029-HI is a T-A series spade drill insert designed for high-productivity hole-making in demanding industrial machining applications. Built from cobalt high-speed steel and finished with a PVD-applied TiAlN coating, this insert delivers improved heat resistance and extended tool life compared to uncoated alternatives. It features a 132-degree point angle and measures 23.02 mm (29/32 inch) in diameter with a 0.1563-inch thickness. The 181A-0029-HI seats into a Size 1 T-A spade drill holder and is installed by machinists and toolroom technicians on lathes, machining centers, and drill presses.

This insert is suited for drilling steel, stainless steel, cast iron, super-alloys, titanium, and hard materials. It covers a broad range of primary workpiece material classifications including P, M, K, S, and H categories under standard ISO material codes. Typical applications include production drilling in aerospace, oil and gas, die and mold, and general metalworking environments where a single insert must perform across multiple material types without tool changes.

Key Features

• 23.02 mm (29/32 inch) cutting diameter for precise bore sizing
• Cobalt substrate provides toughness and thermal stability at elevated cutting speeds
• TiAlN PVD coating extends tool life in abrasive and high-temperature cutting conditions
• 132-degree point angle reduces thrust force and suits a wide range of workpiece materials
• T-A Series Size 1 seat interface for quick, repeatable insert indexing
• 0.1563-inch insert thickness ensures rigid seating in the holder pocket

Compatibility

Designed for use with T-A series Size 1 spade drill holders. Compatible primary workpiece materials include steel, stainless steel, cast iron, super-alloys, titanium, and hard materials (ISO material codes P, M, K, S, and H).

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the machine spindle before seating or removing the insert. Use the correct T-A holder wrench to torque the insert screw to the holder manufacturer's specification — do not use improvised tools that may damage the seating surfaces. Inspect the holder pocket for chips or wear before every insert change to maintain concentricity and cutting performance.