Allied Machine 1C20T-.640 Spade Drill Insert 41/64 in Carbide

Product Description

The ALLIED MACHINE AND ENGINEERING 1C20T-.640 is a solid carbide spade drill insert engineered for precision hole-making in demanding machining applications. Built to Series T-A seat size 0 specifications, this insert measures 41/64 inches in diameter with a 132-degree point angle and a thickness of 0.125 inches. The TiN (titanium nitride) PVD coating extends tool life and reduces friction at the cutting edge. Manufactured to the C2 (K20) carbide grade, this insert delivers consistent performance across a range of workpiece materials. Machinists and toolroom professionals install this insert into compatible T-A spade drill holders for production drilling operations.

This insert is suited for drilling stainless steel, cast iron, non-ferrous metals, superalloys, and titanium — material classifications M, K, N, and S. It is a common choice in CNC and manual machining environments where precise diameter control and hole quality are required. The 41/64-inch diameter makes it appropriate for applications requiring a tight tolerance bore or a pre-drill pass ahead of reaming. Typical industries include aerospace, general manufacturing, and heavy equipment repair where hard and abrasive workpiece materials demand a coated carbide cutting edge.

Key Features

• Solid carbide construction, manufacturer grade C2 (K20), for rigidity and wear resistance in hard materials
• TiN PVD coating reduces friction and improves tool life across M, K, N, and S material classifications
• 132-degree point angle geometry suited for entry into stainless steel, cast iron, and superalloys
• Series T-A seat size 0 interface for compatibility with T-A spade drill holder bodies
• 0.125-inch insert thickness provides stable seating and repeatable cutting edge positioning
• 41/64-inch diameter delivers precise hole sizing in a single pass

Compatibility

Designed for use with Series T-A spade drill holder bodies accepting seat size 0 inserts. Suitable for workpiece materials classified as stainless steel (M), cast iron (K), non-ferrous metals (N), and superalloys and titanium (S).

Installation Notes

Installation should be performed by a qualified machinist following the tool holder manufacturer's insert seating and torque procedures. Ensure the machine spindle is fully stopped and the tool holder is removed from the machine before replacing the insert. Inspect the insert seat for chips or debris before seating the new insert, as contamination will affect runout and hole quality. Follow applicable shop safety protocols and manufacturer guidelines when handling carbide tooling, as edges are extremely sharp.