Allied Machine 1C20T-.578 Spade Drill Insert 37/64 in

Product Description

The ALLIED MACHINE AND ENGINEERING 1C20T-.578 is a solid carbide spade drill insert designed for high-performance hole-making in demanding machining applications. Built to T-A series specifications, this insert features a 132-degree point angle and a TiN (titanium nitride) PVD coating that extends tool life and reduces friction at the cutting edge. The Seat Size 0 designation matches it to compatible T-A series spade drill holders. At 0.125 inches thick and 37/64 inches in diameter, this insert is sized for precision boring in production and job-shop environments. Licensed machinists and CNC operators are the primary installers.

This insert is suited for drilling stainless steel, cast iron, non-ferrous metals, super-alloys, and titanium. The C2 (K20) carbide grade and TiN PVD coating make it a practical choice where tool wear and heat generation are concerns. Typical applications include production drilling on CNC machining centers and manual lathes where consistent hole geometry and surface finish are required. It is packaged as a single insert and ordered in single-unit increments.

Key Features

• 37/64 inch diameter, Seat Size 0, compatible with T-A series spade drill holders
• Solid carbide construction in manufacturer grade C2 (K20) for wear resistance
• TiN PVD coating reduces friction and extends cutting edge life
• 132-degree point angle for accurate entry and reduced thrust force
• 0.125 inch insert thickness for rigid, stable cutting performance
• Rated for stainless steel, cast iron, non-ferrous metals, super-alloys, and titanium

Compatibility

Designed for use with T-A series Seat Size 0 spade drill holders. Workpiece material compatibility includes stainless steel (M), cast iron (K), non-ferrous metals (N), and super-alloys and titanium (S) per ISO material classification codes.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. The machine spindle must be fully stopped and the tool holder secured before inserting or removing the spade drill insert. Use the correct seat size and torque the insert screw according to the holder manufacturer specifications. Inspect the seating pocket for chips or debris before each insert change to ensure proper seating and runout control.