M.a. Ford 20407300 Solid Carbide Jobber Drill Bit No. 49

Product Description

The M.A. FORD 20407300 is a solid carbide jobber-length drill bit sized to wire gauge No. 49, with a decimal diameter of 0.0730 inches and an overall length of 1.75 inches. The two-flute, right-hand spiral design produces clean, accurate holes in a wide range of demanding workpiece materials. The 118-degree faceted drill point provides self-centering entry and is web-thinned to reduce thrust force during penetration. Bright uncoated finish means the bit runs without added coating friction, making it suitable for use with cutting fluids when drilling harder alloys. This bit is installed by machinists, toolroom technicians, and precision sheet-metal fabricators working with small-diameter holes in production or repair applications.

The 20407300 is designed for general-purpose drilling in cast iron, non-ferrous metals, stainless steel, and carbon steel. The solid carbide construction supports higher cutting speeds and longer tool life compared to high-speed steel equivalents, particularly in abrasive or work-hardening materials. The straight cylindrical shank accepts standard drill chucks and collet holders. Typical use cases include precision hole-making on the bench drill press, CNC machining centers, and manual knee mills where tight hole-location tolerances are required.

Key Features

• Solid carbide construction for increased rigidity and tool life in abrasive materials
• No. 49 wire gauge size, 0.0730 inches decimal diameter
• 118-degree faceted point with web thinning to lower entry thrust
• Right-hand cut, regular spiral flute, 5xD flute-to-diameter ratio
• Bright uncoated finish compatible with standard cutting fluids
• ISO 9001:2015 certified manufacturing for dimensional consistency

Compatibility

Designed as a general-purpose replacement or production drill bit rated for cast iron, non-ferrous metal, stainless steel, and steel workpieces. Fits any standard drill chuck or collet holder accepting a 0.0730-inch straight cylindrical shank.

Installation Notes

This bit is installed by machinists and precision fabricators using drill presses, manual mills, or CNC machining centers. Secure the straight shank firmly in a properly sized collet or drill chuck before operation to prevent runout. Solid carbide is brittle compared to high-speed steel - avoid side loading, interrupted cuts without adequate support, and excessive feed rates that can cause tip fracture. Always power down or lock out the spindle before changing bits.