M.a. Ford 20509800A Drill Bit Size 40 Solid Carbide

Product Description

The M.A. FORD 20509800A is a screw machine length drill bit designed for precision drilling in tight-clearance and high-production applications. Built from solid carbide, it delivers superior hardness and wear resistance compared to high-speed steel alternatives. The drill features a 135-degree split point with web thinning, which reduces thrust force and improves centering on entry without a pilot hole. At 1.8125 inches overall length and 0.0980 inches in diameter (Wire Size 40), this stub-length bit fits compact drilling setups and short-stroke machines. Two spiral flutes with a slow helix control chip evacuation in the materials this bit is engineered for.

This drill bit is intended for use in metalworking and machining applications involving cast iron, non-ferrous metals, stainless steel, and carbon steel. The screw machine length format makes it well suited for CNC machining centers, drill presses, and manual screw machines where rigidity and minimal deflection are critical. The straight cylindrical shank seats directly in standard drill chucks and collets. It is a single-margin design with a 3xD flute-to-diameter ratio, providing clearance in shallow-to-moderate depth holes.

Key Features

• Solid carbide construction for hardness and wear resistance in ferrous and non-ferrous materials
• 135-degree web-thinned split point reduces entry thrust and improves self-centering
• Slow spiral flute geometry optimized for chip control in cast iron and stainless steel
• Screw machine length (1.8125 inches OAL) provides added rigidity over jobber-length bits
• Straight cylindrical shank compatible with standard chucks and collets
• Tight diameter tolerance of +0.0000 to -0.0005 inches for precision bore sizing

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide drill bit for metalworking applications requiring Wire Size 40 (0.0980 inch diameter) screw machine length tooling in compatible drill chucks and collets.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the chuck or collet is clean and undamaged before seating the shank. Solid carbide tooling is brittle - avoid side-loading or interrupted cuts that exceed the bit design parameters. Confirm spindle speed and feed rate are appropriate for the workpiece material before beginning the drilling operation.