M.a. Ford 20407000 Solid Carbide Jobber Drill Bit No 50

Product Description

The M.A. FORD 20407000 is a solid carbide jobber-length drill bit sized to wire gauge No. 50, with a decimal diameter of 0.0700 inches. The bit features a 118-degree faceted drill point, a regular spiral flute, and a straight-cylindrical shank of equal 0.0700-inch diameter. Overall length is 1.75 inches with a flute length of 0.875 inches, giving a flute-to-diameter ratio of 5xD. The bright, uncoated finish suits applications where coating adhesion or contamination is a concern. Web-thinned construction with a tapered web reduces entry thrust and improves chip evacuation. This bit is intended for installation by machinists and tool-room technicians working in precision drilling operations.

The 20407000 is designed for general-purpose drilling in a range of workpiece materials including cast iron, non-ferrous metals, stainless steel, and carbon steel. Its two-flute right-hand spiral geometry handles these material groups across standard drill press, CNC, and hand-held drilling setups. The 0.0700-inch diameter makes it well suited for pilot holes, through-hole operations, and close-tolerance work where small-diameter precision is required. No coolant-through capability is present, so external coolant or cutting fluid application is recommended when drilling stainless steel or cast iron.

Key Features

• Solid carbide construction provides rigidity and wear resistance in hard and abrasive workpiece materials
• 118-degree faceted point delivers accurate self-centering entry and clean hole geometry
• Web-thinned, tapered web reduces thrust force and improves chip flow at small diameters
• Right-hand, regular spiral flute geometry suits cast iron, non-ferrous metal, stainless steel, and steel
• Bright uncoated finish maintains tight diameter tolerance of -0.0005 to 0.0000 inches
• ISO 9001:2015 certified manufacturing ensures consistent dimensional quality

Compatibility

Designed as a general-purpose replacement or stock bit for applications requiring a No. 50 wire-size drill in solid carbide. Compatible workpiece material codes K, M, N, and P cover cast iron, non-ferrous metals, stainless steel, and steel per standard material classification. Part of M.A. FORD Series 204.

Installation Notes

Solid carbide drill bits are brittle and must be run at appropriate spindle speeds and feed rates for the workpiece material to avoid chipping or fracture. Power down and lock out any machine before changing tooling. Use external cutting fluid when drilling stainless steel or cast iron to control heat. Inspect the cutting edge and shank for damage before each use; do not run a chipped or bent carbide bit.