M.a. Ford. 20525190A Screw Machine Drill Bit 6.4mm Carbide

Product Description

The M.A. FORD. 20525190A is a screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built from solid carbide with a coated finish, it delivers superior wear resistance and cutting speed compared to high-speed steel alternatives. The bit features a 135-degree split point with web thinning to reduce thrust, improve centering, and minimize workpiece walking at the start of a cut. At 6.4 mm (0.2519 inches) in diameter with a 64 mm (2.52 inches) overall length, this stub-length format provides added rigidity for tighter tolerances and reduced deflection in short-reach drilling setups. It is suited for machinists, tool and die technicians, and metalworking professionals who require consistent hole quality at production volumes.

This drill bit is engineered for use in CNC machining centers, drill presses, and manual lathes where stub-length tooling is preferred for rigidity. Primary workpiece materials include cast iron, non-ferrous metals, stainless steel, and steel. The 2-flute slow spiral design promotes chip evacuation in tough materials and maintains cutting edge integrity at elevated feeds. A straight-cylindrical shank at 6.4 mm diameter provides secure clamping in standard drill chucks and collet holders without slippage under load. Series 205 from M.A. FORD. represents a purpose-built line of solid carbide stub drills for general metalworking applications.

Key Features

• Solid carbide construction with coated finish for extended tool life in ferrous and non-ferrous metals
• 135-degree drill point angle with web thinning reduces thrust and improves self-centering
• Slow spiral, 2-flute geometry promotes controlled chip evacuation in difficult materials
• Screw machine (stub) length at 64 mm OAL increases rigidity and reduces deflection
• Straight-cylindrical shank at 6.4 mm diameter for compatibility with standard chucks and collets
• Diameter tolerance held to +0.000 to -0.013 mm for consistent, repeatable hole sizing

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers, drill presses, and lathes that accept straight-shank drill bits in the 6.4 mm diameter range. Suitable for workpieces in cast iron, non-ferrous metal, stainless steel, and steel as specified by the manufacturer.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling technicians familiar with metal cutting operations. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck or collet. Verify that the straight-cylindrical shank is fully seated and clamped to the manufacturer-recommended holding torque for the chuck or collet system in use. Do not exceed the recommended feed rate or spindle speed for the workpiece material, as solid carbide tooling is brittle and susceptible to breakage under shock loading or improper setup.