Allied Machine 152T-0031 Spade Drill Insert 31/32 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 152T-0031 is a cobalt spade drill insert designed for high-performance drilling in demanding metalworking applications. Built to Seat Size 2 within the T-A series system, this insert measures 31/32 inches in diameter and features a 132-degree point angle optimized for penetrating hard and abrasion-resistant workpiece materials. The insert is manufactured from T15 cobalt high-speed steel and finished with a Physical Vapor Deposition (PVD) Titanium Nitride (TiN) coating, which reduces friction, extends tool life, and improves chip evacuation at the cutting edge. Machinists and tool-room professionals install this insert into compatible T-A series spade drill holders for production drilling operations.

This insert is suited for drilling steel, stainless steel, cast iron, superalloys, and titanium, covering ISO material codes P, M, K, and S. It is commonly used in job shop and production environments where frequent insert changes are preferred over regrinding solid drills. The fractional inch sizing and standard Seat Size 2 designation make it a direct fit for T-A series holders already in use on CNC machining centers, lathes with live tooling, and manual drill presses running at appropriate speeds and feeds for cobalt tooling.

Key Features

• 31/32 inch diameter, Seat Size 2, T-A series spade drill insert
• T15 cobalt high-speed steel construction for heat and wear resistance
• 132-degree point angle for positive engagement on flat and curved entry surfaces
• TiN coating applied via PVD process reduces friction and extends cutting life
• Rated for steel, stainless steel, cast iron, superalloys, and titanium workpiece materials
• 0.1875 inch insert thickness for consistent seating in compatible holders

Compatibility

Designed for use with T-A series Seat Size 2 spade drill holders. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium (ISO codes P, M, K, S).

Installation Notes

This insert is installed by a machinist or toolroom technician into a compatible T-A series spade drill holder. Before changing inserts, ensure the machine is powered off and locked out per facility lockout/tagout procedures. Use the correct torque wrench and insert screw specified by the holder manufacturer to secure the insert; an improperly seated insert can cause premature failure or workpiece damage. Verify holder and insert seat condition before reinstallation to ensure proper clamping.