M.a. Ford 20641300 Screw Machine Drill Bit 0.413 in

Product Description

The M.A. FORD 20641300 is a screw machine length (stub length) solid carbide drill bit with a 0.413 inch diameter and a 118 degree faceted point angle. Designed for high-rigidity, short-reach drilling applications, it features a two-flute spiral configuration with a web-thinned, parallel-web construction that reduces thrust and improves chip evacuation at the cutting tip. The straight-cylindrical shank measures 0.413 inches in diameter and 1.5 inches in length, fitting standard drill chucks and collet holders. With a bright uncoated finish, this bit is suited for machinists, tool and die technicians, and maintenance professionals running production or repair work on ferrous and non-ferrous materials.

The 20641300 is built for drilling cast iron, non-ferrous metals, stainless steel, and carbon or alloy steel in machining centers, drill presses, and CNC turning applications where a short, stiff tool is preferred over jobber length. The stub length body reduces deflection during entry and through-hole drilling. The right-hand cut geometry and 3xD flute-to-diameter ratio support consistent chip clearance in moderate-depth holes without coolant-through capability, making it a straightforward choice for dry or flood-cooled setups on manual or CNC equipment.

Key Features

• Solid carbide construction provides rigidity and wear resistance across cast iron, stainless steel, and non-ferrous workpieces
• 118 degree faceted point with web thinning reduces entry thrust and centers the bit reliably
• Screw machine (stub) length body minimizes deflection for precision hole placement
• Bright uncoated finish compatible with dry cutting and standard flood coolant environments
• Straight-cylindrical shank fits standard drill chucks and ER collet systems without adapters
• Tight diameter tolerance of +0.0000 to -0.0005 inches supports close-tolerance hole sizing

Compatibility

Designed as an OEM-style solid carbide screw machine drill for use in drill presses, machining centers, and CNC lathes accepting straight-cylindrical shank tooling in the 0.413 inch diameter range. Primary workpiece materials listed by the manufacturer include cast iron, non-ferrous metal, stainless steel, and steel.

Installation Notes

This drill bit should be installed in a properly sized collet, chuck, or tool holder rated for the 0.413 inch shank diameter; verify runout before beginning production cuts. Machinists should confirm spindle speed and feed rate against carbide tooling recommendations for the specific workpiece material before engaging the cut. Solid carbide is brittle compared to high-speed steel and should not be used in setups with significant spindle runout, excessive vibration, or interrupted cuts without verifying suitability. Inspect the cutting edges and point geometry before each use and replace at the first sign of chipping or edge wear.