M.a. Ford. 20525590T Screw Machine Drill Bit 0.2559 in

Product Description

The M.A. FORD. 20525590T is a solid carbide screw machine length drill bit designed for high-precision drilling in demanding trade and industrial applications. The bit measures 0.2559 inches (6.50 mm) in diameter with an overall length of 2.6378 inches (67.00 mm) and features a 135-degree split point for accurate self-centering starts with minimal walking. Constructed from solid carbide with a coated finish, this bit delivers extended tool life compared to HSS alternatives. Right-hand cut with a slow spiral flute and web-thinned parallel web configuration, it is suited for machinists, toolroom technicians, and maintenance professionals who require tight-tolerance hole production.

The 20525590T is built for drilling into cast iron, non-ferrous metals, stainless steel, and steel. Its screw machine length profile - shorter than jobber length - provides added rigidity in turret lathes, CNC machining centers, and screw machine setups where reduced overhang and chatter control matter. The straight-cylindrical shank fits standard drill chucks and collet holders without modification. The 3xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes typical of production drilling environments.

Key Features

• Solid carbide construction with coated finish for extended tool life in hard and abrasive materials
• 135-degree split point with web thinning for self-centering entry and reduced thrust force
• Slow spiral flute geometry optimized for cast iron, stainless steel, and non-ferrous metals
• Screw machine length body (2.6378 inches overall) provides rigidity in short-reach setups
• Straight-cylindrical shank (0.2559 inches diameter) fits standard chucks and collet holders
• Diameter tolerance of +0.0000 to -0.0005 inches for consistent, close-tolerance hole sizing

Compatibility

Designed as an OEM-style replacement or direct-application drill bit for use in CNC machining centers, turret lathes, and screw machine setups requiring a 0.2559-inch diameter screw machine length drill. Compatible with workpiece materials including cast iron, non-ferrous metal, stainless steel, and steel as specified by the manufacturer.

Installation Notes

This bit is installed by machinists or toolroom technicians in a standard drill chuck or collet holder matched to a 0.2559-inch straight shank. Ensure the spindle and machine are fully powered down and locked out before changing tooling. Use appropriate cutting fluid or coolant for the workpiece material, as this bit does not feature through-coolant capability. Inspect the cutting edges before each use and replace if chipping or wear is detected to maintain hole tolerance.