Allied Machine 1C20A-0020 Spade Drill Insert 5/8 in Carbide

Product Description

The ALLIED MACHINE AND ENGINEERING 1C20A-0020 is a solid carbide spade drill insert designed for high-performance hole-making in demanding machining applications. Built to T-A Series specifications, it measures 5/8 inch in diameter with a 132-degree point angle and a Seat Size 0 designation. The insert features a TiAlN (titanium aluminum nitride) PVD coating that improves heat resistance and extends tool life at elevated cutting speeds. At 0.125 inches thick and weighing 0.1 pounds, it is a direct-fit replacement insert for compatible T-A Series spade drill holders. This insert is used by machinists and tool and die professionals working in production and job-shop environments.

The 1C20A-0020 is engineered for use across a range of primary workpiece materials including stainless steel, cast iron, non-ferrous metals, super-alloys, and titanium. These material groups correspond to ISO classifications M, K, N, and S. It is well suited for CNC machining centers, lathes, and drill presses where precise, repeatable hole geometry is required. The T-A Series platform is a two-piece system that separates the insert from the holder, allowing worn inserts to be swapped without replacing the entire tool body.

Key Features

• Solid carbide construction at Manufacturer Grade C2 (K20) for rigidity and wear resistance
• TiAlN PVD coating improves thermal stability and tool life in high-speed cutting
• 132-degree point angle reduces thrust and improves chip formation on entry
• 5/8 inch diameter, Seat Size 0, compatible with T-A Series spade drill holders
• Rated for stainless steel, cast iron, non-ferrous metals, super-alloys, and titanium (ISO M, K, N, S)
• 0.125 inch insert thickness for precise seating in the holder pocket

Compatibility

Designed for use with T-A Series spade drill holders accepting a Seat Size 0 insert at 5/8 inch diameter. Verify holder seat size and insert diameter before installation; no specific holder model numbers were provided in the product data.

Installation Notes

Insert replacement should be performed by a qualified machinist with the spindle powered down and the machine locked out per facility lockout/tagout procedures. Seat the insert fully into the holder pocket and torque the clamping screw to the holder manufacturer specification — do not over-torque, as carbide inserts are brittle and can crack under excessive clamping force. Inspect the holder seat for chips, debris, or wear before installing a new insert, as a damaged seat will affect hole position and insert life.