M.a. Ford. 20514400 Screw Machine Drill Bit 0.144in Carbide

Product Description

The M.A. FORD. 20514400 is a solid carbide screw machine length drill bit designed for high-precision hole-making in demanding materials. Measuring 0.144 inches in diameter (Wire Size 27), it features a 135-degree split point with web thinning to reduce thrust and improve centering without a center punch. The overall length of 2.0625 inches and the shortened flute geometry of screw machine length tooling make it well suited for rigid setups where rigidity and chip evacuation are priorities. Right-hand cut with a slow spiral, two-flute configuration, this bit is intended for machinists, tool-and-die tradespeople, and CNC operators running production work on precision components.

This drill bit is rated for use in cast iron, non-ferrous metals, stainless steel, and steel. The screw machine length format is commonly found in turret lathes, machining centers, and drill presses where stub-length tooling reduces deflection on close-tolerance work. The straight-cylindrical shank at 0.1440 inches diameter seats directly into standard collets or drill chucks without adapters. It is a single-margin design with no coolant-through capability, making it appropriate for conventional flood coolant or dry cutting setups in shop environments.

Key Features

• Solid carbide construction provides hardness and wear resistance for production drilling in ferrous and non-ferrous materials
• 135-degree split point with web thinning reduces walking and cutting thrust
• Screw machine (stub) length at 2.0625 inches overall improves rigidity and minimizes deflection
• Slow spiral, two-flute design promotes controlled chip evacuation in deep holes relative to diameter
• Bright/uncoated finish - no coating thickness to account for in tight-tolerance diameter applications
• Diameter tolerance of +0.0000 to -0.0005 inches ensures consistent hole sizing for close-fit applications

Compatibility

Designed as a Series 205 screw machine length drill for use in cast iron, non-ferrous metal, stainless steel, and steel workpiece materials. Fits standard drill chucks and collet systems accepting a 0.1440-inch straight-cylindrical shank. Drill bit size range for this series spans 0.1000 to 0.1500 inches.

Installation Notes

Installation and use of this tooling should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify collet or chuck runout is within acceptable limits before use, as carbide tooling is sensitive to side-loading and vibration. Solid carbide bits are brittle relative to high-speed steel - avoid interrupted cuts or conditions that produce lateral shock without confirming the application is appropriate for carbide.