M.a. Ford. 20628120 Carbide Screw Machine Drill Bit 9/32

Product Description

The M.A. FORD. 20628120 is a solid carbide screw machine length drill bit designed for high-precision drilling in demanding industrial and machining applications. Built to Series 206 specifications, this bit measures 9/32 inch (0.2812 inches) in diameter with a 118-degree faceted point angle and a web-thinned geometry that reduces entry thrust and promotes cleaner hole starts. The 2-flute spiral configuration with a parallel web provides consistent chip evacuation. At 2.5 inches overall length, this short-length format offers added rigidity compared to jobber-length bits, making it well-suited for tight-tolerance work. Machinists and tooling professionals install this bit in CNC machining centers, drill presses, and manual machine setups.

This drill bit is engineered for use on cast iron, non-ferrous metals, stainless steel, and general steel workpieces. The bright uncoated finish makes it a practical choice for applications where coating compatibility is a concern or where re-sharpening is anticipated. The straight-cylindrical shank at 0.2812 inches diameter fits standard drill chucks and collet systems without modification. The 1-inch flute length and 3xD flute-to-diameter ratio are optimized for shallow-to-moderate depth holes in production and job-shop environments.

Key Features

• Solid carbide construction for superior hardness and wear resistance versus high-speed steel
• 118-degree faceted point with web thinning reduces thrust and improves centering
• 9/32 inch (0.2812 inches) diameter with tight tolerance of +0.0000 to -0.0005 inches
• Short screw machine length (2.5 inches overall) provides rigidity in close-clearance setups
• Right-hand cut, 2-flute spiral design supports efficient chip removal
• Bright uncoated finish compatible with a wide range of cutting fluids and re-sharpening cycles

Compatibility

Suitable for drilling cast iron, non-ferrous metals, stainless steel, and carbon or alloy steel. Designed to fit standard drill chucks and collet systems accepting a 0.2812-inch straight-cylindrical shank, consistent with Series 206 screw machine length tooling.

Installation Notes

Installation and operation of this drill bit should be performed by qualified machinists or tooling professionals familiar with proper speeds, feeds, and fixturing for solid carbide tooling. Always secure the workpiece firmly before drilling and confirm chuck or collet runout is within acceptable tolerances, as carbide is more brittle than high-speed steel and sensitive to lateral loading. Power down the machine and lock out energy sources before changing tooling. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.