M.a. Ford. 20718750 Screw Machine Drill Bit 3/16 in

Product Description

The M.A. FORD. 20718750 is a screw machine length drill bit designed for precision drilling in non-ferrous metals and similar materials. Built from solid carbide, it delivers the rigidity and wear resistance needed for high-speed, short-hole drilling applications. The bit measures 0.1875 inches (3/16 inch) in diameter with an overall length of 2.1875 inches and a flute length of 0.9375 inches. A bright/uncoated finish and fast spiral flute geometry promote efficient chip evacuation. The straight-cylindrical shank seats directly in standard drill chucks or collets. This is a Series 207 bit with a web-thinned, parallel web configuration for reduced thrust at entry.

This drill bit is suited for production and maintenance drilling in non-ferrous metals, plastics, and composite materials where a compact screw machine length provides improved rigidity over jobber-length bits. The 3xD flute-to-diameter ratio keeps the bit stiff in short-hole operations, making it a practical choice for CNC machining centers, drill presses, and manual screw machine setups. Machinists and tool-and-die professionals working in high-precision environments will find the tight diameter tolerance of +0.0000 to -0.0005 inches useful for held-size drilling without reaming.

Key Features

• Solid carbide construction for extended tool life in non-ferrous metal drilling
• Bright/uncoated finish, right-hand cut with fast spiral flute for efficient chip removal
• Screw machine (stub) length at 2.1875 inches overall for improved rigidity
• Tight diameter tolerance of +0.0000 to -0.0005 inches for precision bore sizing
• Web-thinned parallel web reduces entry thrust and improves centering
• Straight-cylindrical shank compatible with standard chucks and collets

Compatibility

Designed as an OEM-style replacement or direct-application solid carbide screw machine drill bit for use in standard drill chucks, collet systems, and CNC toolholders accepting a 0.1875-inch straight-cylindrical shank.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists or tool technicians familiar with proper speeds, feeds, and clamping procedures for the workpiece material. Ensure the machine spindle and toolholder are powered down and locked out before bit changes. Inspect the shank and chuck bore for contamination or damage before seating the bit. Carbide is brittle — avoid side loading, interrupted cuts without proper setup, or dropping the bit on hard surfaces.