Allied Machine 151A-0029 Spade Drill Insert 29/32 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 151A-0029 is a cobalt spade drill insert designed for high-performance drilling in demanding industrial machining applications. Part of the T-A series, this insert features a 132-degree point angle and a PVD-applied TiAlN coating that extends tool life by reducing heat buildup and wear at the cutting edge. It fits a Seat Size 1 holder and measures 29/32 inches in diameter with a thickness of 0.1563 inches. Licensed machinists and CNC operators install this type of insert as a consumable cutting tool in spade drill bodies used on lathes, machining centers, and drill presses.

This insert is suited for drilling operations in steel, stainless steel, cast iron, super-alloys, and titanium — covering ISO material classifications P, M, K, and S. The T-A series is a widely recognized spade drilling platform used across aerospace, oil and gas, automotive, and general metalworking production environments. Its cobalt substrate provides added toughness and heat resistance compared to standard high-speed steel, making it appropriate for interrupted cuts and harder workpiece materials where tool stability is critical.

Key Features

• 29/32 inch diameter with Seat Size 1 for T-A series spade drill bodies
• 132-degree point angle for efficient chip formation and reduced thrust
• Cobalt substrate provides superior heat and wear resistance over standard HSS
• TiAlN PVD coating extends tool life in high-temperature cutting conditions
• Compatible with primary workpiece materials: steel, stainless steel, cast iron, super-alloys, and titanium (ISO P, M, K, S)
• Thickness of 0.1563 inches for precise seating in compatible holders

Compatibility

Designed for use with T-A series Seat Size 1 spade drill bodies. Primary workpiece materials include steel, stainless steel, cast iron, super-alloys, and titanium, corresponding to ISO material groups P, M, K, and S.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Before replacing the insert, ensure the machine spindle is fully stopped, locked out, and the tool holder is secured in a vise or fixture. Inspect the seat and holder pocket for debris or damage before seating the new insert, as contamination can affect insert positioning and cutting accuracy. Follow the tool body manufacturer's torque specifications for the clamping screw, and verify insert seating before returning the tool to service.