M.a. Ford 20615900 Screw Machine Drill Bit 0.159 in

Product Description

The M.A. FORD 20615900 is a screw machine length (stub-length) solid carbide drill bit with a 0.159-inch diameter, corresponding to wire gauge size 21. Solid carbide construction delivers the rigidity and heat resistance needed for demanding materials including stainless steel, cast iron, and non-ferrous metals. The 118-degree faceted point angle and web-thinned tip reduce entry force and improve hole location accuracy. At 2 inches overall length, this short-body drill is designed for high-stability, close-tolerance drilling in rigid setups such as CNC machining centers, screw machines, and drill presses. A bright uncoated finish suits general-purpose and coolant-assisted applications.

This drill bit is suited for production and job-shop environments where short, stiff tooling is required to minimize deflection. Typical applications include drilling stainless steel, steel alloys, cast iron, and non-ferrous metals in both manual and automated setups. The straight cylindrical shank fits standard drill chucks and collet holders. The regular spiral flute geometry with a parallel web and 3xD flute-to-diameter ratio supports efficient chip evacuation in short-hole drilling scenarios. Machinists, toolroom technicians, and maintenance mechanics working in metalworking trades are the primary installers of this tooling.

Key Features

• Solid carbide construction for rigidity and heat resistance in tough workpiece materials
• 118-degree faceted drill point with web thinning for reduced entry force and improved centering
• Screw machine (short) length at 2 inches overall for maximum rigidity and minimal runout
• Right-hand cut, regular spiral flute for efficient chip clearing in production drilling
• Bright uncoated finish compatible with coolant or dry drilling operations
• Diameter tolerance of +0.0000 to -0.0005 inches for close-tolerance hole requirements

Compatibility

Designed as an OEM-style tooling solution for standard drill chucks and collet holders accepting a 0.159-inch straight cylindrical shank, suitable for CNC machining centers, screw machines, and bench drill presses operating on cast iron, non-ferrous metal, stainless steel, and steel workpieces.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or toolroom technicians familiar with metal-cutting operations. Ensure the machine spindle is fully stopped and locked out before inserting or removing tooling from the chuck or collet. Verify shank seating and runout with a dial indicator before beginning production drilling. Do not exceed the recommended feed and speed parameters for the workpiece material to avoid carbide fracture.