M.a. Ford. 20517190T Screw Machine Drill Bit 11/64 Carbide

Product Description

The M.A. FORD. 20517190T is a screw machine length drill bit designed for high-performance drilling in demanding materials. Built from solid carbide, this bit measures 0.1719 inches (11/64 inch) in diameter with a 135-degree split point for accurate, self-centering starts. The slow spiral flute geometry and web-thinned, parallel web construction reduce thrust and improve chip evacuation in short-hole applications. Overall length is 2.125 inches with a straight cylindrical shank. The right-hand cut and coated finish make this bit well suited for production drilling environments where tool life and hole quality are both critical. Licensed tradespeople and machinists rely on this geometry in high-cycle operations.

This bit is rated for use in cast iron, non-ferrous metals, stainless steel, and steel. The screw machine (stub) length provides added rigidity compared to jobber-length drills, making it a practical choice for CNC machining centers, drill presses, and manual machines where reduced deflection and tighter tolerances are required. The 3xD flute-to-diameter ratio supports controlled chip flow in shallow to medium-depth holes. Series 205 identifies this as part of M.A. FORD.'s carbide stub drill lineup.

Key Features

• Solid carbide construction for extended tool life in hard and abrasive materials
• 135-degree split point reduces walking and lowers required thrust force
• Slow spiral flute with web-thinned parallel web improves chip control in short-hole drilling
• Screw machine (stub) length adds rigidity and reduces deflection versus jobber drills
• Coated finish for improved wear resistance and surface lubricity
• Diameter tolerance held to +0.0000 to -0.0005 inches for consistent fit and finish

Compatibility

Designed for use in cast iron, non-ferrous metal, stainless steel, and steel workpieces. Fits standard straight-shank drill chucks and collets accepting a 0.1719-inch shank. Part of M.A. FORD. Series 205 carbide stub drill line covering the 0.1500 to 0.2000 inch diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or tool-and-die professionals familiar with carbide tooling. Secure the shank fully in a compatible chuck or collet before operation and verify runout is within acceptable limits, as carbide is brittle and sensitive to side loads. Power down the machine completely before loading or changing the bit. Do not use this bit in hammer drill or impact mode.