M.a. Ford. 79050004 Countersink 100 Degree 6 Flute Hss

Product Description

The M.A. FORD. 79050004 is a 6-flute, single-end countersink machined from high-speed steel and designed for chamfering, countersinking, and deburring operations. It features a 100-degree included angle (50-degree centerline angle) with a bright, uncoated finish. The 3/8-inch straight-cylindrical shank fits standard tool holders, and the 2-inch overall length provides solid reach in typical machining setups. Machinists and toolroom technicians use this type of countersink in both manual and CNC drilling applications where clean, consistent seat geometry is required before fastener installation.

This countersink is suited for use on a wide range of work materials including mild steel, alloy steel, high-tensile steel, stainless steel, cast iron, high-nickel steel, Monel, brass, aluminum, magnesium, magnesium alloy, and plastic. Its multi-flute geometry produces a smooth finish with reduced chatter compared to single- or double-flute designs. It is commonly used in job-shop, production, and maintenance environments where a variety of substrate materials are encountered in a single shift.

Key Features

• 100-degree included angle for standard chamfering and countersinking applications
• 6-flute design reduces chatter and produces a smooth seat finish
• High-speed steel construction provides good wear resistance across a broad material range
• Bright, uncoated finish suitable for general-purpose use without added coating cost
• 3/8-inch straight-cylindrical shank for compatibility with standard drill chucks and collets
• Single-end, no-pilot design gives the operator full control over hole placement and depth

Compatibility

Designed as an OEM-style single-end countersink for use with standard drill presses, mills, and CNC machining centers accepting a 3/8-inch straight-cylindrical shank.

Installation Notes

Installation and operation should be performed by qualified machinists or toolroom technicians familiar with rotating cutting tools. Secure the shank fully in the tool holder before operation and verify runout is within acceptable limits before cutting. Always set spindle speed appropriate to the workpiece material and tool diameter to prevent overheating of the high-speed steel cutting edges. Power down and de-energize the machine completely before changing or inspecting the tool.