M.a. Ford 20550000T Screw Machine Drill Bit 0.5 in Carbide

Product Description

The M.A. FORD 20550000T is a screw machine length drill bit designed for high-performance drilling in demanding industrial and metalworking applications. Built from solid carbide, this bit measures 0.5 inches in diameter with an overall length of 3.75 inches and a flute length of 2.25 inches. The 135-degree split point geometry reduces walking and thrust load at entry, making it well-suited for production drilling environments. A slow spiral flute design and web-thinned, parallel web configuration improve chip evacuation and cutting efficiency. The straight-cylindrical shank at 0.5 inches diameter provides secure chuck engagement across standard drilling equipment.

This bit is intended for drilling cast iron, non-ferrous metals, stainless steel, and steel in machining and fabrication settings. The screw machine length format - shorter than jobber length - delivers added rigidity and reduced deflection, making it appropriate for CNC machining centers, drill presses, and manual turret lathes where stub-length tooling is preferred. The 3xD flute-to-diameter ratio supports controlled chip flow in shallow-to-moderate depth holes. Machinists, tool and die workers, and general metalworking shops are the primary users of this bit.

Key Features

• Solid carbide construction for hardness, wear resistance, and thermal stability in metal cutting
• 135-degree split point reduces thrust and eliminates the need for a center punch on most metals
• Slow spiral flute geometry promotes chip control in short-chipping materials such as cast iron and stainless steel
• Web-thinned parallel web lowers cutting resistance and improves penetration rate
• Screw machine length body provides greater rigidity and reduced deflection compared to jobber length bits
• Coated finish extends tool life in abrasive and high-heat cutting conditions
• Right-hand cut, straight-cylindrical shank compatible with standard drill chucks and collets

Compatibility

The M.A. FORD Series 205 screw machine length drill bit in 0.5-inch diameter is designed for use in standard drill chucks, collet systems, and toolholders accepting a 0.5-inch straight-cylindrical shank. Rated for drilling cast iron, non-ferrous metal, stainless steel, and steel workpiece materials.

Installation Notes

Solid carbide tooling requires rigid machine setups - use in CNC machining centers or rigid drill presses rather than hand-held drills to avoid chipping or fracture. Secure the shank fully in the chuck or collet and verify runout before beginning a cut. Coolant-through is not supported on this bit, so external coolant or cutting fluid should be applied where heat buildup is a concern when drilling stainless steel or hardened alloys. Inspect the cutting edges for chipping before each use, as carbide is brittle and can fail if run after impact damage.