Allied Machine 152N-25 Spade Drill Insert 63/64 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 152N-25 is a cobalt spade drill insert designed for high-performance hole-making in demanding industrial and machining applications. This T-A series insert measures 63/64 inches in diameter with a 132-degree point angle and a 0.1875-inch thickness. The TiCN (Titanium Carbonitride) PVD coating increases surface hardness and reduces friction, extending tool life in abrasive and high-temperature cutting conditions. Seat Size 2 corresponds to the T-A series holder standard, making replacement and indexing straightforward for machinists and tool crib personnel familiar with the Allied Machine T-A system.

This insert is suited for production drilling operations across a range of workpiece materials including steel, stainless steel, cast iron, super-alloys, and titanium. Typical applications include job shop and production floor drilling on CNC machining centers, drill presses, and turret lathes where consistent hole diameter and tool life are critical. The cobalt substrate provides added toughness and heat resistance compared to standard high-speed steel, making it a practical choice for interrupted cuts and harder alloys.

Key Features

• 63/64-inch diameter for close-tolerance hole sizing
• 132-degree point angle reduces thrust and improves chip formation on entry
• Cobalt substrate offers superior heat and wear resistance over standard HSS
• TiCN PVD coating extends tool life and lowers cutting friction
• T-A series Seat Size 2 for direct interchange with compatible Allied Machine holders
• 0.1875-inch insert thickness provides rigidity in the holder pocket

Compatibility

Designed for use with Allied Machine and Engineering T-A series Seat Size 2 spade drill holders. Compatible with workpiece materials coded P (steel), M (stainless steel), K (cast iron), and S (super-alloys and titanium) per ISO material classification.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Ensure the machine spindle is fully stopped and the tool holder is secured in the turret or spindle before inserting or removing the spade drill insert. Seat the insert fully and evenly in the holder pocket and torque the clamping screw to the holder manufacturer specification. Inspect the seating pocket for chips or debris before each insert change to prevent insert rocking and premature wear.