Allied Machine 434T-0216 Spade Drill Insert 2.5in Hss Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 434T-0216 is a spade drill insert designed for high-productivity drilling in metalworking applications. Manufactured from M4-grade High Speed Steel with a TiN (Titanium Nitride) PVD coating, this insert delivers extended tool life and reduced friction during cutting. It measures 2-1/2 inches in diameter with a 132-degree point angle and fits Seat Size 4 spade drill holders. The 0.3125-inch insert thickness contributes to rigid, stable performance at depth. This is a fractional-inch, GEN2 T-A series insert intended for professional machining environments.

This spade drill insert is suited for drilling steel, cast iron, and non-ferrous metals in production or job-shop settings. The GEN2 T-A series is a widely recognized platform in indexable spade drilling, commonly used on CNC machining centers, lathes with live tooling, and manual boring mills. Typical applications include through-hole and blind-hole drilling where large-diameter HSS tooling is preferred over solid carbide for cost efficiency and toughness in interrupted cuts or variable workpiece conditions.

Key Features

• 2-1/2 inch diameter, Seat Size 4, GEN2 T-A series spade drill insert
• M4-grade High Speed Steel construction for toughness in interrupted cuts
• TiN PVD coating reduces friction and extends cutting edge life
• 132-degree point angle for controlled entry and accurate hole location
• 0.3125 inch insert thickness provides rigidity at full drilling depth
• Compatible with steel, cast iron, and non-ferrous metal workpieces

Compatibility

Designed for use with Seat Size 4 spade drill holders in the GEN2 T-A series platform. Suitable for primary workpiece materials including steel (P), cast iron (K), and non-ferrous metals (N) per ISO material classification codes.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in a locked-out, de-energized state per LOTO procedures. Seat and insert contact surfaces should be clean and free of chips before seating the insert. Secure the insert using the appropriate torque driver for the holder style — do not overtighten or substitute fasteners. Verify runout and alignment before resuming production cutting.