Allied Machine 21411-0003 Indexable Spade Drill Taper Shank

Product Description

The ALLIED MACHINE AND ENGINEERING 21411-0003 is an indexable spade drill designed for high-performance metal-cutting operations across a wide range of workpiece materials. It accepts interchangeable spade drill inserts and covers a drilling diameter range of 31/32 inches to 1-3/8 inches with a maximum drill depth of 3 inches. The shank is a 3MT (Morse Taper 3) taper shank measuring 15/16 inches in diameter and 3-7/8 inches in length, making it compatible with standard taper-spindle drill presses and machining centers. The straight flute geometry promotes chip evacuation in a variety of materials, and the overall assembly length comes to 6-7/8 inches. This tool is installed and operated by machinists, tool-and-die technicians, and CNC operators in production and job-shop environments.

The 21411-0003 belongs to Allied Machine and Engineering Series HP-A (High Performance). The primary workpiece material classification covers universal material groups, including workpiece material codes K, M, N, and P, which correspond broadly to cast iron, stainless and heat-resistant alloys, non-ferrous metals, and steel. It is suited for short-hole drilling applications in both manual and CNC machine tool setups where a taper-shank interface is available. No through-coolant is provided; this tool relies on flood or mist coolant delivered externally.

Key Features

• Drilling diameter range: 31/32 inches to 1-3/8 inches
• Maximum drill depth: 3 inches with straight flute geometry for chip clearance
• 3MT taper shank for direct mounting in Morse Taper spindles and sleeves
• Body length of 3-23/32 inches and flute length of 3 inches in a short-length configuration
• High-performance HP-A series designation for demanding production applications
• Universal material compatibility across steel, cast iron, non-ferrous, and stainless alloy workpieces

Compatibility

Designed for use with Allied Machine and Engineering Series HP-A indexable spade drill inserts. Compatible with machine spindles and drill sleeves accepting a 3MT (Morse Taper No. 3) taper shank. No specific model numbers were provided in the product data; verify insert and spindle compatibility with Allied Machine and Engineering documentation before installation.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Before mounting, ensure the machine spindle is fully powered down and locked out per facility lockout/tagout procedures. Clean the taper shank and spindle socket thoroughly before seating to ensure proper alignment and to prevent fretting. Do not use this tool with through-spindle coolant systems, as this model does not support coolant-through operation.