M.a. Ford. 20407850A Jobber Drill No. 47 Solid Carbide

Product Description

The M.A. FORD. 20407850A is a solid carbide jobber-length drill bit sized to No. 47 wire gauge (0.0785 inches diameter) and designed for precision drilling in demanding materials. It features a 118-degree four-facet point ground to a web-thinned geometry for reduced thrust and cleaner entry. The ALtima and Titanium Nitride (TiN) dual coating improves surface hardness, lubricity, and tool life compared to uncoated carbide. Overall length is 1.75 inches with a 0.875-inch flute length. Right-hand spiral flutes with a regular spiral type handle chip evacuation efficiently. This drill is suited for machinists, tool-and-die technicians, and production drilling operations where tight tolerances and consistent hole quality are required.

This drill bit is built for general-purpose production and maintenance drilling in cast iron, non-ferrous metals, stainless steel, and carbon steel. The small diameter and jobber-length format make it well suited for precision hole-making in fixtures, assemblies, and fabricated components. The straight-cylindrical shank seats directly in standard drill chucks and collet holders without adapters. It is part of M.A. FORD. Series 204, a line of small-diameter solid carbide drills engineered for repeatable performance in short-run and high-cycle applications alike.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• ALtima and TiN dual coating extends tool life and reduces built-up edge on non-ferrous and stainless applications
• 118-degree four-facet point with web thinning reduces entry thrust and improves centering accuracy
• Right-hand regular spiral flutes promote efficient chip evacuation in through and blind holes
• Diameter tolerance of +0.0000 to -0.0005 inches supports consistent close-tolerance hole sizing
• Straight-cylindrical shank fits standard drill chucks and collet holders without modification

Compatibility

Designed as an OEM-style general-purpose jobber drill for use in any standard drill press, CNC machining center, or hand-held drill equipped with a chuck or collet capable of accepting a 0.0785-inch straight shank. Primary workpiece material codes K, M, N, and P cover cast iron, non-ferrous metal, stainless steel, and carbon steel.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with small-diameter carbide tooling. Secure the shank fully in the chuck or collet and verify runout before drilling, as carbide is brittle and sensitive to lateral loading. Coolant-through is not supported on this drill; apply cutting fluid externally when drilling stainless steel or cast iron to manage heat and extend tool life. Avoid using this drill in impact drivers or hammer-drill mode, which will fracture the carbide substrate.