M.a. Ford 20640620 Carbide Screw Machine Drill Bit 0.4062 in

Product Description

The M.A. FORD 20640620 is a screw machine length (stub length) solid carbide drill bit designed for high-precision hole-making in demanding materials. Sized at 0.4062 inches (13/32 inch) in diameter, it features a 118-degree faceted point angle with web thinning for reduced thrust and cleaner entry. The two-flute spiral design in a straight-cylindrical shank configuration delivers consistent chip evacuation in short-reach drilling applications. Machinists and tool-room technicians working with production equipment, CNC machining centers, or drill presses rely on this bit where rigidity and dimensional accuracy are priorities.

This drill bit is suited for short-reach drilling operations in cast iron, non-ferrous metals, stainless steel, and steel. The stub length body reduces deflection compared to jobber-length bits, making it a practical choice for tight-tolerance work in production environments. The bright/uncoated finish keeps the carbide substrate exposed for direct heat dissipation and easy wear inspection. It is sold individually and is appropriate for both manual and CNC-controlled spindle applications.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• 118-degree faceted point with web thinning reduces axial cutting force and improves hole entry
• Screw machine (stub) length body minimizes deflection in close-clearance setups
• Right-hand cut, two-flute spiral geometry for consistent chip removal
• Straight-cylindrical shank at 0.4062 inches fits standard collets and drill chucks
• Diameter tolerance held to +0.0000 to -0.0005 inches for precise fit applications
• Bright/uncoated finish — no coating buildup to affect diameter or edge sharpness

Compatibility

Designed for use in CNC machining centers, drill presses, and manual or automated drilling equipment that accept a 0.4062-inch straight-cylindrical shank. Suitable for primary workpiece materials including cast iron, non-ferrous metal, stainless steel, and steel as specified by the manufacturer for Series 206.

Installation Notes

Installation and use of this drill bit should be performed by a qualified machinist or tooling technician familiar with speeds, feeds, and clamping requirements for solid carbide tooling. Secure the shank fully in a collet or drill chuck rated for the shank diameter before engaging the spindle. Solid carbide is brittle — avoid side-loading, interrupted cuts beyond the tool design intent, or re-chucking on a worn shank seat, as these can cause tool fracture. Always verify spindle runout is within tolerance before production use.