M.a. Ford. 79075004 Countersink 100 Deg 6 Flute Hss

Product Description

The M.A. FORD. 79075004 is a 6-flute, single-end countersink machined from high-speed steel for chamfering, countersinking, and deburring operations on a wide range of workpiece materials. It features a 100-degree included angle (50-degree centerline angle) and a 3/4-inch head diameter paired with a 1/2-inch straight cylindrical shank. The bright, uncoated finish suits general-purpose shop use where coating is not required. Overall length is 2.75 inches. Machinists, tool-and-die technicians, and CNC setup operators install this tool in standard drill presses, mills, or hand-held drilling equipment when a clean, consistent countersink seat is required.

This countersink is suited for production and job-shop environments where a single tool must handle multiple material types. The 100-degree angle is commonly specified for fastener seating in aerospace-adjacent and general metalworking applications. Compatible workpiece materials include alloy steel, aluminum, brass, cast iron, high-nickel steel, high-tensile steel, magnesium, magnesium alloy, mild steel, Monel, plastic, and stainless steel. It does not include a pilot and is not a head-only style, making it ready to run straight from the package without additional components.

Key Features

• 100-degree included angle for standard fastener countersink profiles
• 6 flutes for smoother cutting action and reduced chatter on harder materials
• High-speed steel construction provides durability across a broad material range
• Bright/uncoated finish for general-purpose metalworking use
• Straight cylindrical 1/2-inch shank fits standard collets and drill chucks
• No pilot required - single-end design installs without additional accessories

Compatibility

Designed for use in drill presses, vertical mills, and hand-held drilling equipment accepting a 1/2-inch straight cylindrical shank. Suitable for chamfering, countersinking, and deburring operations on alloy steel, aluminum, brass, cast iron, high-nickel steel, high-tensile steel, magnesium, magnesium alloy, mild steel, Monel, plastic, and stainless steel workpieces.

Installation Notes

Installation is performed by machinists or toolroom technicians familiar with rotating cutting tools and machine tool setup. Ensure the machine spindle is fully stopped and locked out before inserting or removing the countersink from the collet or chuck. Secure the shank to the full recommended grip depth and verify runout before cutting. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection based on workpiece material.