Allied Machine 181T-0027 Spade Drill Insert 27/32 in Cobalt Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 181T-0027 is a cobalt spade drill insert designed for high-performance drilling in demanding machining applications. Part of the T-A Series, this insert measures 27/32 inches in diameter and features a 132-degree point angle for precise, aggressive entry into workpieces. The TiN (titanium nitride) PVD coating reduces friction and extends tool life. At 0.1563 inches thick, it fits Seat Size 1 T-A Series holders. Machinists and toolroom professionals working in production environments install this insert as a replaceable cutting element, eliminating the need to replace the entire drill body when the cutting edge wears.

This insert is suited for drilling steel, stainless steel, cast iron, super-alloys, titanium, and hard materials — covering ISO material groups P, M, K, S, and H. It is a practical choice for job shops and production floors running mixed-material work where a single insert geometry needs to handle a broad range of workpiece materials. The T-A Series spade drill system is a common platform in general machining, turning, and mill-drill operations across both manual and CNC setups.

Key Features

• 27/32 inch diameter cutting insert for T-A Series Seat Size 1 holders
• 132-degree point angle for fast, decisive entry into workpiece material
• Cobalt substrate provides toughness and heat resistance in interrupted cuts
• TiN PVD coating reduces friction and improves wear resistance
• 0.1563 inch insert thickness for positive seating in compatible holders
• Rated for steel, stainless steel, cast iron, super-alloys, titanium, and hard materials

Compatibility

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

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the drill holder is secured in the spindle and the machine is powered down and locked out before seating or removing the insert. Seat the insert fully and confirm the fastening screw is properly torqued per the holder manufacturer's documentation before resuming operation. Inspect the insert seating pocket for chips or debris before each installation to prevent improper seating.