M.a. Ford. 79250003 90 Deg 6 Flute Hss Countersink 2-1/2 in

Product Description

The M.A. FORD. 79250003 is a 6-flute, high-speed steel countersink designed for chamfering, countersinking, and deburring operations in metal fabrication and machining environments. It features a 90-degree included angle and a 2-1/2 inch head diameter, making it suited for larger-diameter countersink applications. The straight-cylindrical shank measures 3/4 inch in diameter and the tool runs to an overall length of 5 inches. The bright/uncoated finish keeps the cutting edge exposed and inspection-ready. Machinists and tool-and-die professionals are the primary installers of this type of cutter in production and job-shop settings.

This countersink is applied across a wide range of materials including alloy steel, mild steel, stainless steel, cast iron, high-tensile steel, high-nickel steel, Monel, aluminum, brass, magnesium, magnesium alloy, and plastic. It is a single-end tool with no included pilot and no pilot hole requirement at the countersink stage. Typical use cases include chamfering bolt-hole entries, deburring drilled holes, and preparing screw seats in structural and precision machined components. It is well suited to both manual and CNC machine setups where a 3/4 inch straight shank is compatible.

Key Features

• 90-degree included angle for standard fastener seat preparation
• 6-flute geometry for smooth cutting action and reduced chatter
• 2-1/2 inch head diameter handles large-diameter countersink requirements
• High-speed steel construction supports a broad range of workpiece materials
• Bright/uncoated finish - no coating buildup interference on cutting edges
• Straight-cylindrical 3/4 inch shank fits standard collets and chucks
• Single-end design; no pilot included for flexible positioning

Compatibility

Compatible with machine setups accepting a 3/4 inch straight-cylindrical shank. Suitable for use on alloy steel, mild steel, stainless steel, cast iron, high-tensile steel, high-nickel steel, Monel, aluminum, brass, magnesium, magnesium alloy, and plastic workpieces.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with rotating cutting tools. Secure the shank firmly in a collet or drill chuck rated for the intended spindle speed before operation. Always power down and bring the spindle to a complete stop before changing or inspecting the tool. Follow standard shop safety protocols including eye protection and secure workpiece fixturing when operating countersinks at production speeds.