Allied Machine 153A-0124 Spade Drill Insert 1-3/4 in Seat 3

Product Description

The ALLIED MACHINE AND ENGINEERING 153A-0124 is a spade drill insert engineered for high-performance hole-making in demanding machining applications. Manufactured from cobalt high-speed steel and finished with a TiAlN PVD coating, this insert delivers extended tool life in abrasive and heat-intensive cutting conditions. It measures 1-3/4 inches in diameter and seats into a Size 3 spade drill holder. The 132-degree point angle promotes accurate entry and efficient chip evacuation. At 0.25 inches thick, the insert is designed for rigidity under heavy feed loads. Machinists and tooling technicians install this insert as part of the T-A Series spade drill system for production drilling operations.

This insert is suited for drilling operations on steel, stainless steel, cast iron, super-alloys, and titanium workpieces, corresponding to ISO material classifications P, M, K, and S. It is used in CNC machining centers, lathes with live tooling, and manual drill presses where consistent hole geometry and tool longevity are required. The TiAlN coating provides thermal resistance that extends insert life when cutting difficult-to-machine materials at elevated speeds and feeds. This insert is typically used in production shops, aerospace component manufacturing, and heavy fabrication environments.

Key Features

• 1-3/4 inch diameter for large-bore spade drilling applications
• Cobalt substrate for improved hardness and heat resistance over standard HSS
• TiAlN PVD coating extends tool life in abrasive and high-temperature cutting
• 132-degree point angle for accurate starting and reduced thrust force
• Size 3 seat compatible with T-A Series spade drill holders
• Rated for steel, stainless steel, cast iron, super-alloys, and titanium

Compatibility

Designed for use with T-A Series Size 3 spade drill holders. Compatible with workpiece materials including steel, stainless steel, cast iron, super-alloys, and titanium (ISO material groups P, M, K, S).

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the spindle before seating or removing the insert. Ensure the holder seat is clean and free of chips or debris before securing the insert, as contamination can affect seating accuracy and runout. Follow the holder manufacturer torque guidance for the retaining screw and verify insert security before resuming cutting operations.