M.a. Ford. 20507810 Carbide Screw Machine Drill Bit

Product Description

The M.A. FORD. 20507810 is a solid carbide screw machine length drill bit designed for precision drilling in demanding machining applications. Built to Series 205 specifications, it features a 135-degree split point for fast penetration and reduced walking on entry. The slow spiral flute geometry and web-thinned, parallel web construction help manage chip evacuation and reduce thrust in short-hole drilling operations. With a 5/64 inch (0.0781 inch) diameter and a bright, uncoated finish, this bit is suited for machinists and toolroom professionals working in production or job-shop environments.

This drill bit is sized for screw machine length work, where a stubby overall length of 1-11/16 inches provides maximum rigidity and minimizes deflection in CNC machining centers, turret lathes, and screw machines. It is rated for use in cast iron, non-ferrous metals, stainless steel, and steel, making it a versatile choice across a wide range of workpiece materials. The straight-cylindrical shank seats securely in standard drill chucks and collets without modification.

Key Features

• Solid carbide construction for superior hardness and wear resistance in ferrous and non-ferrous materials
• 135-degree split point reduces thrust and minimizes bit walking on entry
• Slow spiral flute with web thinning and parallel web for efficient chip clearance in short-hole operations
• Screw machine length (1-11/16 inches overall) maximizes rigidity and reduces deflection
• Right-hand cut, 2-flute design with bright, uncoated finish
• Diameter tolerance held to +0.0000 to -0.0005 inches for precision fitment

Compatibility

Designed for use in standard drill chucks and collets accepting a 0.0781 inch straight-cylindrical shank, compatible with CNC machining centers, turret lathes, and screw machine setups working in cast iron, non-ferrous metal, stainless steel, and steel.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with cutting tool handling and machine operation. Secure the shank fully in a properly sized collet or drill chuck before operation and verify runout is within acceptable limits. Carbide is brittle — avoid side loading, interrupted cuts without appropriate feed adjustments, or dropping the bit on hard surfaces. Follow machine manufacturer guidelines for spindle speed and feed rate selection based on workpiece material.