M.a. Ford 20409950 Solid Carbide Jobber Drill Bit No. 39

Product Description

The M.A. FORD 20409950 is a solid carbide jobber length drill bit sized at No. 39 (0.0995 inches decimal equivalent) with a 118-degree faceted point angle. It is designed for general-purpose drilling in demanding workpiece materials including cast iron, stainless steel, carbon steel, and non-ferrous metals. The bit features a regular spiral flute with web thinning for improved chip evacuation and reduced thrust at entry. Overall length is 2.25 inches with a 1.25-inch flute length. The straight-cylindrical shank measures 0.0995 inches in diameter, matching the drill diameter for direct chuck mounting. This bit is suited for use by machinists, tool-and-die workers, and maintenance technicians requiring tight-tolerance hole work.

The 20409950 fits general-purpose drilling applications in both production and maintenance environments. Its 5xD flute-to-diameter ratio supports drilling in short-run and repetitive operations on cast iron, stainless steel, steel, and non-ferrous metals. The bright uncoated finish is appropriate for dry cutting or use with cutting fluids. This bit is sold individually and is part of M.A. FORD Series 204, which covers small-diameter solid carbide jobber drills in the 0.0500 to 0.1000 inch size range.

Key Features

• Solid carbide construction for extended tool life in hard and abrasive workpiece materials
• No. 39 wire gauge size with 0.0995-inch decimal diameter and -0.0005 to 0.0000 inch diameter tolerance
• 118-degree faceted point angle with web-thinned, tapered web for reduced entry thrust
• Regular spiral, 2-flute design with 1.25-inch flute length and 5xD flute-by-diameter ratio
• Bright uncoated finish compatible with dry cutting and standard cutting fluid applications
• ISO 9001:2015 certified manufacturing

Compatibility

Designed as a general-purpose replacement or production drill bit for applications requiring a No. 39 wire gauge hole in cast iron, non-ferrous metal, stainless steel, or steel. Part of M.A. FORD Series 204 solid carbide jobber drills covering the 0.0500 to 0.1000 inch diameter range.

Installation Notes

Installation is performed by machinists or maintenance technicians using a compatible drill press, CNC machining center, or handheld drill with a chuck rated for the 0.0995-inch shank diameter. Secure the shank fully in the chuck before operation to prevent runout. Inspect the cutting edges for chipping before each use, as solid carbide is brittle and susceptible to damage from improper handling or interrupted cuts. Follow machine shop safety practices and manufacturer feed-and-speed recommendations for the workpiece material being drilled.