Allied Machine 181T-0029 Spade Drill Insert 29/32 in Cobalt Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 181T-0029 is a cobalt spade drill insert designed for high-performance drilling in demanding industrial applications. Part of the T-A series, this insert features a 132-degree point angle and a PVD-applied TiN (titanium nitride) coating that extends tool life by reducing friction and wear at the cutting edge. The insert measures 29/32 inches in diameter with a Seat Size 1 designation, and its 0.1563-inch thickness provides consistent seating and repeatable positioning in compatible T-A spade drill holders. Machinists and toolroom professionals typically install and apply this insert in production drilling operations.

This insert is suited for drilling operations across a wide range of workpiece materials, including steel, stainless steel, cast iron, super-alloys, titanium, and hard materials, corresponding to ISO material groups P, M, K, S, and H. Its cobalt substrate provides the heat and wear resistance needed when cutting tough or abrasion-prone materials. The TiN coating adds a secondary layer of protection, making this insert a practical choice for shops running moderate to high-speed drilling cycles on ferrous and exotic-alloy components.

Key Features

• Cobalt insert material for elevated heat resistance and edge toughness in hard and abrasive workpieces
• TiN coating applied via PVD process for reduced friction and extended cutting life
• 132-degree point angle for efficient chip formation and reduced thrust in through-hole and blind-hole drilling
• 29/32-inch diameter with Seat Size 1 for consistent, repeatable fit in T-A series holders
• Compatible with steel, stainless steel, cast iron, super-alloys, titanium, and hard materials (ISO P, M, K, S, H)
• Thickness of 0.1563 inches ensures precise axial positioning within the holder pocket

Compatibility

Designed for use with T-A series Seat Size 1 spade drill holders. Verify holder seat size and diameter range against your specific holder documentation before installation.

Installation Notes

Insert replacement is typically performed by a machinist or toolroom technician. Always power down and lock out the spindle drive before handling inserts. Inspect the holder pocket for chips, burrs, or wear before seating the insert, and use the appropriate insert screw and torque tool as specified by the holder manufacturer. Handle cutting edges with care to avoid chipping the coating prior to use.