M.a. Ford 20507080A Screw Machine Drill Bit 1.80mm Carbide

Product Description

The M.A. FORD 20507080A is a screw machine length drill bit ground from solid carbide stock, designed for high-precision drilling in demanding production environments. At 1.80mm (0.0708 inches) in diameter with an overall length of 43.00mm (1.6929 inches), this bit features a 135-degree split point with web thinning for fast engagement and reduced thrust. The helical slow-spiral flute geometry and straight cylindrical shank make it well-suited for short, rigid setups in CNC machining centers, screw machines, and drill presses where runout control is critical. Licensed machinists and toolroom technicians are the typical end users.

This drill bit is built for production drilling in cast iron, non-ferrous metals, stainless steel, and steel. The screw machine length format — shorter than jobber length — provides added rigidity and reduced deflection, which is especially valuable when drilling small-diameter holes in hard or abrasive workpiece materials. The 3xD flute-to-diameter ratio and coated finish help manage chip evacuation and extend tool life in high-cycle applications. It is packaged and sold as a single unit.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous applications
• 135-degree split point with web thinning reduces thrust and improves self-centering on entry
• Slow helical spiral flute design aids chip control in short-hole drilling
• Screw machine length format provides added stiffness versus jobber length at this diameter
• Coated finish extends tool life in abrasive workpiece materials
• Tight diameter tolerance of +0.0000 to -0.0005 inches supports precision hole sizing

Compatibility

Designed for use in CNC machining centers, screw machines, and drill presses accepting a 1.80mm straight cylindrical shank. Suitable for drilling cast iron, non-ferrous metal, stainless steel, and steel workpieces as specified by the manufacturer.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists or toolroom technicians familiar with speeds, feeds, and workholding for small-diameter tooling. Secure the shank fully in the collet or chuck before operation and verify runout with a dial indicator where tolerances are tight. Solid carbide is brittle — avoid side loading, interrupted cuts without proper feed reduction, or dropping the tool on hard surfaces. Always power down and lock out the machine spindle before changing tooling.