Allied Machine 181A-0028 Spade Drill Insert 7/8 in Cobalt Tialn

Product Description

The ALLIED MACHINE AND ENGINEERING 181A-0028 is a spade drill insert designed for high-performance hole-making in demanding machining environments. Manufactured from cobalt high-speed steel and finished with a TiAlN (titanium aluminum nitride) PVD coating, this insert delivers extended tool life and heat resistance at elevated cutting speeds. It features a 7/8 inch cutting diameter, a 132-degree point angle optimized for clean entry and accurate positioning, and a Seat Size 1 profile compatible with the T-A spade drill system. The 0.1563 inch insert thickness provides rigidity across a range of feed and speed conditions. Machinists and tool-room professionals install this insert as a direct replacement blade in compatible T-A holders.

This insert is suited for production drilling in steel, stainless steel, cast iron, super-alloys, titanium, and hard materials. It fits residential and commercial machine shop environments as well as production floor applications where through-hole and blind-hole drilling are performed with T-A series spade drill bodies. The TiAlN coating makes it particularly effective in dry or minimal-lubrication cutting conditions where surface temperatures are elevated. It is sold individually with a minimum order quantity of 2 units.

Key Features

• 7/8 inch cutting diameter with 132-degree point angle for accurate hole entry and reduced thrust
• Cobalt substrate provides superior hardness and heat resistance compared to standard high-speed steel
• TiAlN PVD coating extends tool life in ferrous and hard-material cutting applications
• Seat Size 1 profile fits T-A series spade drill bodies for quick blade changeout without removing the holder
• 0.1563 inch insert thickness maintains stability across moderate to aggressive feed rates
• Compatible primary workpiece materials span ISO material groups P, M, K, S, and H

Compatibility

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

Installation Notes

Installation is performed by a machinist or tool-crib technician. The machine spindle must be fully stopped and the holder secured before removing or seating an insert. Ensure the insert pocket and seating surfaces are clean and free of chips before installing the new blade. Follow the holder manufacturer's torque guidance for the insert clamping screw to prevent insert movement during cutting.