M.a. Ford. 79100006 Countersink 120 Degree 6 Flute Hss

Product Description

The M.A. FORD. 79100006 is a single-end, 6-flute high-speed steel countersink designed for right-hand cutting at a 120-degree included angle (60-degree centerline angle). With a 1-inch head diameter and a straight-cylindrical 0.5-inch shank, it seats securely in standard chucks and collets. The bright, uncoated finish is suitable for general-purpose work where lubrication is applied at the point of use. Overall length is 2.75 inches. No pilot is included. This tool is installed and operated by machinists, tool-and-die technicians, maintenance mechanics, and fabricators working in production or job-shop environments.

The 79100006 is suited for chamfering, countersinking, and deburring operations across a broad range of materials in both light manufacturing and heavy fabrication settings. Its multi-flute geometry produces a cleaner finish than single- or two-flute alternatives, making it appropriate for visible fastener seats, precision assemblies, and deburring on structural components. Compatible with standard drill presses, CNC machining centers, and handheld power tools equipped with a 0.5-inch or larger chuck or collet holder.

Key Features

• 120-degree included angle for standard flat-head fastener countersinks per common machine screw specifications
• 6-flute design reduces chatter and produces a smoother finish than low-flute-count countersinks
• High-speed steel construction provides toughness and resharpening capability
• Bright/uncoated finish allows easy visual inspection of cutting edges after use
• Straight-cylindrical 0.5-inch shank fits standard drill chucks and collets without adapters
• No pilot required, allowing free positioning over existing holes

Compatibility

Rated for use on alloy steel, aluminum, brass, cast iron, high-nickel steel, high-tensile steel, magnesium, magnesium alloy, mild steel, Monel, plastic, and stainless steel. Fits any machine or handheld tool accepting a 0.5-inch straight-cylindrical shank.

Installation Notes

Secure the shank fully in the chuck or collet before operation and verify there is no runout before engaging the workpiece. Use appropriate cutting fluid or lubricant for the material being machined, particularly on stainless and high-nickel alloys, to extend edge life. Set spindle speed according to published HSS speed-and-feed tables for the specific material; excessive speed will accelerate edge wear. Always de-energize and lock out the machine before changing or inspecting the tool.