Allied Machine 181A-0025 Spade Drill Insert 25/32 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 181A-0025 is a cobalt spade drill insert designed for high-performance drilling in demanding metalworking applications. Sized at 25/32 inch diameter with a Seat Size 1 designation, this insert fits the T-A series spade drill system. The 132-degree point angle delivers efficient chip formation and accurate hole entry. A TiAlN (titanium aluminum nitride) PVD coating provides thermal resistance and extended tool life when cutting ferrous and hard materials. At 0.1563 inches thickness, the insert maintains structural rigidity under high feed rates. Typically installed by machinists and toolroom professionals in production and job-shop environments.

This insert is suited for drilling steel, stainless steel, cast iron, super-alloys, titanium, and hard materials. It is intended for use in the T-A series spade drill holder system. Typical applications include through-hole and blind-hole drilling in heavy-duty CNC machining and manual mill operations where insert interchangeability and repeatable hole quality are required. The TiAlN coating makes it a reliable choice where heat buildup is a concern, such as high-speed dry or near-dry machining of stainless and exotic alloys.

Key Features

• 25/32 inch diameter, Seat Size 1, compatible with T-A series spade drill holders
• Cobalt substrate for toughness and heat resistance in difficult-to-machine materials
• TiAlN PVD coating extends tool life and supports dry or near-dry machining
• 132-degree point angle promotes clean entry and controlled chip evacuation
• 0.1563 inch insert thickness for rigidity under aggressive feed conditions
• Rated for steel, stainless steel, cast iron, super-alloys, titanium, and hard materials

Compatibility

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

Installation Notes

Spade drill inserts are installed and replaced by machinists or toolroom technicians. Always power down and lock out the machine spindle before changing or seating an insert. Ensure the holder pocket and seating surfaces are clean and free of chips before installing the insert. Follow the tool manufacturer torque specifications for the insert clamping screw to prevent micro-movement during cutting.