M.a. Ford. 79150004 Countersink 100 Degree 6 Flute Hss

Product Description

The M.A. FORD. 79150004 is a 6-flute, single-end countersink designed for chamfering, countersinking, and deburring operations in metalworking and fabrication environments. Built from high-speed steel with a bright/uncoated finish, it features a 100-degree included angle and a 1-1/2 inch head diameter on a straight-cylindrical 3/4 inch shank. The 3-1/2 inch overall length provides adequate clearance on most vertical mills, drill presses, and CNC machining centers. Licensed machinists, tool-and-die makers, and shop-floor fabricators are the primary users of this tool.

This countersink is suited for both production and maintenance operations across a wide range of materials. The 6-flute geometry reduces chatter and produces a cleaner finish compared to single- or three-flute alternatives. It is applicable in job shops, aerospace fabrication, structural steel work, and general manufacturing where consistent countersink geometry is required without a pilot.

Key Features

• 100-degree included angle (50-degree centerline angle) for standard aerospace and structural fastener prep
• 6-flute design minimizes chatter and produces a smooth, consistent countersink finish
• High-speed steel construction withstands heat buildup during intermittent and continuous cutting cycles
• Straight-cylindrical 3/4 inch shank fits standard drill chuck and collet setups
• Bright/uncoated finish - no coating thickness to account for in tight-tolerance applications
• No pilot included - suitable for use with or without a separate pilot guide
• Broad material compatibility including alloy steel, stainless steel, aluminum, brass, cast iron, plastic, and magnesium alloys

Compatibility

Compatible with alloy steel, aluminum, brass, cast iron, high-nickel steel, high-tensile steel, magnesium, magnesium alloy, mild steel, Monel, plastic, and stainless steel workpieces. Designed as a straight-shank countersink for use in any machine tool capable of accepting a 3/4 inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists or toolroom technicians using a drill press, vertical mill, or CNC machining center with a compatible 3/4 inch chuck or collet. Ensure the spindle is fully stopped and the machine is powered down before changing or seating the tool. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality. Secure the shank fully in the chuck or collet before initiating any cutting operation.