Allied Machine 15YA-.390 Spade Drill Insert 25/64 in Cobalt

Product Description

The ALLIED MACHINE AND ENGINEERING 15YA-.390 is a cobalt spade drill insert designed for high-performance drilling in demanding industrial applications. Carrying a Seat Size Y designation and belonging to the T-A series, this insert features a 132-degree point angle and a TiAlN (titanium aluminum nitride) coating applied via PVD process. The TiAlN coating improves heat resistance and extends cutting life when drilling through tough materials. At 0.0938 inches thick and a nominal diameter of 25/64 inches, the insert is engineered for precise, consistent hole geometry. It is typically installed by machinists and tooling technicians in production or job-shop environments.

This insert is suited for drilling steel, stainless steel, cast iron, super-alloys, and titanium. The T-A spade drill system is commonly used in CNC machining centers, lathes, and drill presses where high feed rates and deep-hole drilling are required. The cobalt substrate provides added toughness and thermal stability compared to standard high-speed steel, making it appropriate for interrupted cuts and work-hardening materials like stainless steel and titanium alloys.

Key Features

• 25/64 inch diameter with Seat Size Y for use in compatible T-A series holders
• 132-degree point angle optimized for a broad range of workpiece materials
• Cobalt substrate delivers superior heat and wear resistance over standard HSS
• TiAlN PVD coating extends tool life in high-temperature cutting conditions
• Compatible with steel, stainless steel, cast iron, super-alloys, and titanium workpieces

Compatibility

Designed for use with T-A series Seat Size Y spade drill holders as specified by Allied Machine and Engineering. Confirmed primary workpiece material compatibility includes steel, stainless steel, cast iron, super-alloys, and titanium.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and de-energize the machine spindle completely before seating or removing the insert. Ensure the holder pocket and seating surfaces are clean and free of chips before securing the insert. Follow the machine tool manufacturer torque guidelines for the holder clamping screw and verify insert seating before initiating a cut.