M.a. Ford. 20420100 Solid Carbide Jobber Drill Bit No. 7

Product Description

The M.A. FORD. 20420100 is a solid carbide jobber length drill bit in wire gauge size No. 7, equivalent to 0.2010 inches in decimal diameter. Built on the Series 204 platform, it features a 118-degree faceted point angle with web thinning for reduced thrust and cleaner entry. The straight-cylindrical shank measures 0.2010 inches in diameter, and the overall length is 3.0 inches with a flute length of 1.75 inches. A bright, uncoated finish keeps the carbide substrate exposed for maximum heat dissipation in short-cycle drilling operations. This bit is designed for general-purpose drilling and is installed by machinists, tool-and-die workers, and trade professionals working with precision hole tolerances.

The 20420100 is suited for drilling cast iron, non-ferrous metals, stainless steel, and steel. Its 2-flute regular spiral geometry and 5xD flute-to-diameter ratio make it a practical choice for through-hole and blind-hole applications in both manual and CNC drilling setups. The web-thinned, tapered web configuration supports consistent chip evacuation across these material types. Coolant-through capability is not included in this design.

Key Features

• Wire gauge No. 7 size, 0.2010 inches decimal diameter
• 118-degree faceted point angle with web thinning for reduced entry thrust
• Solid carbide construction for rigidity and wear resistance
• 2-flute regular spiral, 5xD flute length ratio for efficient chip clearance
• Bright, uncoated finish compatible with a wide range of workpiece materials
• Diameter tolerance of -0.0005 to 0.0000 inches for close-tolerance hole requirements

Compatibility

Designed for general-purpose drilling in cast iron, non-ferrous metal, stainless steel, and steel workpieces. Compatible with standard drill chucks and CNC tool holders accepting a 0.2010-inch straight-cylindrical shank.

Installation Notes

This drill bit is installed by machinists and qualified trades personnel using drill presses, milling machines, or CNC machining centers. Secure the shank fully in a properly sized chuck or collet before operation. Inspect the cutting edges and point geometry before each use and replace if chipping or wear is observed. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection.