Allied Machine 151A-20 Spade Drill Insert 20mm Cobalt Tialn

Product Description

The ALLIED MACHINE AND ENGINEERING 151A-20 is a spade drill insert designed for high-performance hole-making in demanding machining applications. Part of the T-A Series, this insert measures 20 mm in diameter with a 132-degree point angle and is manufactured from cobalt high-speed steel for toughness and heat resistance. A TiAlN (titanium aluminum nitride) PVD coating extends tool life by reducing friction and improving wear resistance at elevated cutting temperatures. Thickness measures 0.1563 inches. This insert is used by machinists and tooling technicians in production and job-shop environments where accurate, repeatable drilling is required.

This insert is suited for drilling steel, stainless steel, cast iron, super-alloys, and titanium — ISO workpiece material groups P, M, K, and S. The T-A Series spade drill system is a common platform in production machining, typically used in CNC machining centers, lathes with live tooling, and dedicated drilling machines. Seat Size 1 designates the holder interface this insert fits. Applications include through-hole and blind-hole drilling in structural, aerospace, and general manufacturing operations.

Key Features

• 20 mm cutting diameter with 132-degree point angle for reduced thrust and accurate hole entry
• Cobalt substrate provides toughness and resistance to heat-induced deformation
• TiAlN PVD coating reduces wear and extends insert life in abrasive and high-temperature cuts
• Compatible with Seat Size 1 T-A Series spade drill holders
• Rated for steel, stainless steel, cast iron, super-alloys, and titanium workpiece materials
• Thickness of 0.1563 inches ensures proper seating and repeatability in the holder

Compatibility

Designed for use with Seat Size 1 T-A Series spade drill holders. Fits the ALLIED MACHINE AND ENGINEERING T-A Series system. Verify seat size and series designation against your holder before ordering.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine spindle before changing inserts. Seat the insert fully and evenly in the holder pocket and secure with the appropriate fastener to the holder manufacturer's specified procedure — do not over-torque or under-torque the clamping screw. Inspect the insert seat for chips or debris before installation to ensure proper contact and runout.