Allied Machine 4C20P-0020 Spade Drill Insert 5/8 in Carbide

Product Description

The ALLIED MACHINE AND ENGINEERING 4C20P-0020 is a solid carbide spade drill insert designed for high-performance drilling in demanding materials. It features a 5/8 inch diameter, a 132-degree point angle, and an AM300 PVD coating for extended tool life. Built to the GEN2 T-A series specification, this insert fits Seat Size 0 holders and is intended for use by machinists and tooling professionals working in production or job-shop environments. The C2 (K20) material grade provides hardness and wear resistance suited to interrupted cuts and abrasive workpiece materials.

This insert is designed for drilling stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The AM300 PVD coating is selected specifically for its performance in these material groups, reducing heat buildup and edge wear during deep-hole or high-feed drilling operations. It is commonly used in aerospace, automotive, and general metalworking applications where consistent hole quality and dimensional accuracy are required across production runs.

Key Features

• 5/8 inch diameter with a 132-degree point angle for aggressive material entry
• Solid carbide construction at C2 (K20) grade for hardness and wear resistance
• AM300 PVD coating rated for stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• GEN2 T-A series, Seat Size 0 — direct fit for compatible T-A style spade drill holders
• 0.125 inch thickness; overall insert footprint of 1.5 inches by 1.5 inches

Compatibility

Designed as a replacement spade drill insert for GEN2 T-A series Seat Size 0 spade drill holders. Compatible workpiece materials include stainless steel (M), cast iron (K), non-ferrous metals (N), and superalloys and titanium (S) per standard ISO material group coding.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Before seating the insert, ensure the holder pocket is clean and free of chips or debris that could affect seating and runout. Use the torque specification provided by the holder manufacturer — do not overtighten or undertighten the clamp screw, as either condition can cause insert movement or fracture under cutting loads. Inspect the seating surface and clamp mechanism for wear before each insert change.