M.a. Ford 79B037502 Countersink 82 Degree 6 Flute Hss

Product Description

The M.A. FORD 79B037502 is a single-end, 6-flute countersink designed for producing clean, accurate 82-degree countersunk holes in a wide range of materials. Built from high-speed steel (HSS), it delivers consistent cutting performance across ferrous and non-ferrous workpieces. The straight-cylindrical shank measures 1/4 inch in diameter, and the tool has a 2-inch overall length, making it compatible with standard drill presses, hand drills, and CNC setups. With a maximum cutting diameter of 3/8 inch, this countersink is suited for fastener prep work in production and repair environments. Machinists, maintenance technicians, and toolroom professionals are the typical users.

The 79B037502 is used wherever 82-degree flat-head fastener seating is required. The 82-degree included angle matches the standard for flat-head machine screws and is appropriate for countersinking in alloy steel, mild steel, stainless steel, cast iron, aluminum, brass, magnesium, magnesium alloy, high-tensile steel, high-nickel steel, Monel, and plastic. It fits typical production drilling operations as well as field repair and assembly work. The 6-flute geometry reduces chatter and produces a smoother finish than lower-flute-count alternatives.

Key Features

• 82-degree included angle matches standard flat-head fastener geometry
• 6-flute design reduces chatter and improves surface finish
• High-speed steel construction handles a broad material range including stainless steel and cast iron
• Straight-cylindrical shank fits standard drill chucks and collets
• Single-end configuration for straightforward tool changes
• Maximum cutting diameter of 3/8 inch suits common fastener sizes

Compatibility

Designed as an OEM-style countersink for use with standard 1/4-inch straight-shank drill chucks, collets, and quick-change tool holders in drill press, hand drill, and CNC applications.

Installation Notes

Machinists and maintenance technicians should secure the workpiece firmly before countersinking to prevent movement and tool breakage. Use appropriate cutting fluid or lubricant when working with stainless steel, high-nickel alloys, or Monel to extend tool life and reduce work hardening. Apply consistent, moderate feed pressure — avoid forcing the tool, which can chip flutes or produce an oversized seat. Inspect the shank and flutes for wear before each use.