Allied Machine 1C21T-0030 Spade Drill Insert 15/16 in Carbide

Product Description

The ALLIED MACHINE AND ENGINEERING 1C21T-0030 is a 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 physical vapor deposition (PVD) titanium nitride (TiN) coating applied over a C2 (K20) grade carbide substrate. At 15/16 inch diameter with a Seat Size 1 profile and 0.1563 inch thickness, it delivers consistent hole geometry and edge retention in production drilling environments. Installation is performed by machinists and toolroom professionals working with compatible T-A series spade drill holders.

This insert is suited for drilling stainless steel, cast iron, non-ferrous metals, and superalloys including titanium. The 132-degree point angle provides a self-centering entry and reduced thrust compared to wider-angle configurations, making it appropriate for interrupted cuts and cross-hole applications. The TiN PVD coating improves surface hardness and reduces built-up edge, extending tool life in multi-shift production environments. It is sold individually and sized for Seat Size 1 T-A series holders.

Key Features

• 15/16 inch diameter with 0.1563 inch thickness for precise fit in Seat Size 1 holders
• 132-degree point angle for self-centering entry and reduced axial thrust
• C2 (K20) carbide grade balances hardness and toughness across varied workpiece materials
• TiN PVD coating increases surface hardness and resists built-up edge formation
• Compatible primary workpiece materials: stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Fractional inch measurement system; T-A series insert for standard interchangeable holder systems

Compatibility

Designed as a replacement or production insert for T-A series Seat Size 1 spade drill holders. Compatible workpiece material codes M, K, N, and S per ISO classification, covering stainless steel, cast iron, non-ferrous metals, and superalloys including titanium.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Ensure the spade drill holder and insert seat are clean and free of chips or debris before seating the insert. Torque the retaining screw to the holder manufacturer specification using the correct T-handle or hex key. Verify insert seating and runout before initiating a cut, and confirm spindle and coolant systems are off during insert changes.