Allied Machine 181N-0030 Spade Drill Insert 15/16 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 181N-0030 is a spade drill insert designed for high-performance hole-making in demanding machining applications. Part of the T-A series, this insert measures 15/16 inches in diameter and features a 132-degree point angle. It is manufactured from cobalt and finished with a TiCN (Titanium Carbonitride) PVD coating that extends tool life and reduces friction at the cutting edge. The insert seats in a Size 1 holder and has a thickness of 0.1563 inches. It is installed by machinists and tool-and-die professionals working with spade drill systems on CNC or manual machine tools.

This insert is suited for production drilling operations across a range of workpiece materials including steel, stainless steel, cast iron, super-alloys, titanium, and hard materials. The T-A series spade drill system is widely used in job shops and manufacturing facilities where indexable, replaceable inserts reduce tooling cost and setup time compared to solid drills. The 15/16-inch diameter makes it appropriate for medium-bore hole applications in structural, aerospace, and general machining contexts.

Key Features

• 15/16 inch diameter with a 132-degree point angle for accurate hole entry and reduced thrust
• Cobalt insert material provides toughness and heat resistance in interrupted cuts
• TiCN PVD coating improves wear resistance and reduces built-up edge on difficult materials
• Seat Size 1 interface for direct fit into compatible T-A series spade drill holders
• 0.1563 inch insert thickness for consistent seating and rigidity
• Rated for use in 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 material classifications include P (steel), M (stainless steel), K (cast iron), S (super-alloys and titanium), and H (hard materials).

Installation Notes

Installation is performed by a machinist or tooling technician. The machine spindle must be fully stopped and locked out before indexing or replacing the insert. Seat surfaces should be inspected and cleaned before seating the new insert to ensure proper contact and prevent insert rocking. Consult the T-A series holder manufacturer torque guidelines for insert clamping fasteners.