Allied Machine 4C21P-.734 Spade Drill Insert 47/64 in

Product Description

The ALLIED MACHINE AND ENGINEERING 4C21P-.734 is a solid carbide spade drill insert designed for high-performance drilling in demanding materials. Part of the GEN2 T-A series, it features a 132-degree point angle and an AM300 PVD coating that extends tool life in abrasive and hard-to-machine workpiece materials. The insert seats into a Size 1 holder body and is intended for use by machinists and tool-room professionals working in production or job-shop environments. At 0.734 inches (47/64 inch) in diameter, it delivers precise bore sizing with the rigidity and wear resistance that solid carbide provides over high-speed steel alternatives.

This insert is suited for drilling stainless steel, cast iron, non-ferrous metals, and super-alloys including titanium. The GEN2 T-A spade drill system is a common choice in CNC machining centers and manual lathes where replaceable-insert tooling reduces downtime compared to regrinding solid drills. The AM300 coating is specified for mixed-material environments where a single insert must handle varying workpiece grades across a production run.

Key Features

• 47/64 inch (0.734 inch) diameter solid carbide insert for precise hole sizing
• 132-degree point angle suited for flat-bottom entry and general-purpose drilling geometry
• AM300 PVD coating for extended wear resistance in stainless steel, cast iron, non-ferrous metals, and super-alloys
• Manufacturer grade C2 (K20) carbide substrate balances hardness and toughness
• GEN2 T-A series seat size 1 for direct drop-in replacement in compatible holder bodies
• Compact insert dimensions: 1.5 inches long, 1.5 inches wide, 0.38 inches tall

Compatibility

Designed as an OEM-style replacement insert for GEN2 T-A series seat size 1 spade drill holder bodies. Specific holder compatibility should be confirmed against the ALLIED MACHINE AND ENGINEERING GEN2 T-A tooling catalog for seat size 1 assemblies.

Installation Notes

Insert replacement is typically performed by a machinist or toolroom technician. Disengage the machine spindle and confirm the tool is fully de-energized before changing inserts. Seat the insert firmly and evenly into the holder pocket and torque the clamping screw to the holder manufacturer's specified value using the appropriate Torx or hex key. Inspect the insert seat for chips or debris before installation to ensure proper seating and runout.