Allied Machine 1C21T-0024 Spade Drill Insert 0.75in Solid Carbide

Product Description

The ALLIED MACHINE AND ENGINEERING 1C21T-0024 is a solid carbide spade drill insert designed for high-performance drilling in demanding industrial applications. Manufactured to T-A Series specifications, this insert features a 132-degree point angle and a PVD-applied TiN coating that increases surface hardness and reduces friction at the cutting edge. The insert measures 0.75 inches in diameter, fits a Seat Size 1 holder, and carries a manufacturer grade of C2 (K20), making it well suited for work in materials that generate significant cutting forces. Machining professionals in metalworking and precision manufacturing install this insert as part of a modular spade drilling system.

This insert is engineered for drilling operations in stainless steel, cast iron, non-ferrous metals, and super-alloys including titanium. It performs in both through-hole and blind-hole drilling scenarios where tool rigidity and edge retention are critical. The T-A Series platform is a modular system that pairs this insert with compatible T-A Series spade drill holders, allowing insert replacement without removing the holder body from the machine spindle. It is a standard choice for production machining environments running CNC lathes, machining centers, or drill presses where consistent bore quality is required across high material hardness ranges.

Key Features

• Solid carbide construction at manufacturer grade C2 (K20) for high rigidity and wear resistance
• TiN coating applied via PVD process for improved surface hardness and reduced built-up edge
• 132-degree point angle suited for entry into stainless steel, cast iron, and super-alloys
• 0.75 inch diameter, Seat Size 1, compatible with T-A Series spade drill holders
• Insert thickness of 0.1563 inches for precise seating and repeatable positioning
• Modular design allows insert swap without full tool removal from the spindle

Compatibility

Designed for use with T-A Series Seat Size 1 spade drill holders. Rated for primary workpiece materials classified as stainless steel (M), cast iron (K), non-ferrous metals (N), and super-alloys and titanium (S) per ISO material group codes.

Installation Notes

Installation is performed by qualified machinists or tooling technicians following the machine tool builder and toolholder manufacturer torque and clamping specifications. Ensure the machine spindle is fully stopped and locked out before inserting or removing the spade drill insert. Inspect the seat pocket for chips or damage before seating the insert, as debris under the insert will affect runout and bore quality. Follow the holder manufacturer torque specifications for the insert clamping screw to prevent insert movement during the cut.