Allied Machine 434T-0212 Spade Drill Insert 2-3/8 in Hss Tin

Product Description

The ALLIED MACHINE AND ENGINEERING 434T-0212 is a spade drill insert designed for high-performance drilling in a range of workpiece materials. It measures 2-3/8 inches in diameter and belongs to the GEN2 T-A series, a well-established platform for replaceable-insert spade drilling. The insert is manufactured from M4-grade high speed steel and features a physical vapor deposition (PVD) titanium nitride (TiN) coating for improved wear resistance and tool life. The 132-degree point angle suits general-purpose drilling applications where controlled entry and clean hole geometry are required. At 0.3125 inches thick, the insert seats into a Size 4 holder for secure, repeatable positioning.

This insert is suited for use in machining environments where operators are drilling into steel, cast iron, or non-ferrous metals. It fits into spade drill holder systems accepting a Size 4 seat, making it a working component in both production and maintenance machining contexts. The GEN2 T-A series is a common platform in job shops, manufacturing facilities, and heavy equipment maintenance operations. Installation and tool management is typically handled by machinists, toolroom technicians, or maintenance mechanics familiar with indexable drilling systems.

Key Features

• 2-3/8 inch diameter for large-hole spade drilling without solid-drill weight or cost
• M4 high speed steel construction for toughness and resistance to chipping under interrupted cuts
• TiN PVD coating extends cutting edge life and reduces built-up edge on ferrous materials
• 132-degree point angle provides a good balance of centering ability and cutting force distribution
• Size 4 seat ensures positive insert location and repeatable runout when used with compatible holders
• Fractional inch sizing system for straightforward specification in inch-standard machine shops

Compatibility

Designed for use with GEN2 T-A series spade drill holders accepting a Size 4 insert seat. Compatible primary workpiece materials include steel, cast iron, and non-ferrous metals (material codes P, K, and N).

Installation Notes

Insert replacement should be performed with the machine powered off and the spindle locked or confirmed stationary. Verify that the holder seat and clamping surfaces are clean and free of chips before seating the insert, as debris under the insert can affect runout and lead to premature failure. Use the holder manufacturer's recommended torque procedure for the clamping screw — refer to the GEN2 T-A holder documentation for specifics. Inspect the seating pocket for wear or damage each time the insert is changed.