M.a. Ford. 20521650T Screw Machine Drill Bit Solid Carbide

Product Description

The M.A. FORD. 20521650T is a screw machine length drill bit designed for high-precision drilling in demanding industrial and machining applications. Built from solid carbide and finished with a protective coating, this bit delivers the hardness and wear resistance required when drilling cast iron, non-ferrous metals, stainless steel, and steel. It measures 0.2165 inches (5.50 mm) in diameter with an overall length of 2.3622 inches (60.00 mm). The 135-degree split point reduces walking on entry and lowers thrust requirements, while the slow spiral flute geometry is optimized for chip control in tough materials. It is sold individually and is intended for use by machinists, tool-and-die professionals, and maintenance technicians operating drill presses, CNC machining centers, or manual mills.

This drill bit is suited for screw machine and short-length drilling operations where rigidity and accuracy are critical. The straight-cylindrical shank, measuring 0.2165 inches in diameter and 1.1024 inches (28.00 mm) in length, fits standard drill chucks without additional adapters. Primary workpiece materials include cast iron, non-ferrous metals, stainless steel, and carbon steel. The Series 205 design incorporates web thinning with a parallel web configuration and a 3xD flute-to-diameter ratio, making it well-matched to moderate-depth hole applications in production or maintenance environments.

Key Features

• Solid carbide construction provides superior hardness and wear resistance over HSS alternatives
• 135-degree split point reduces entry thrust and minimizes drill walking
• Coated finish extends tool life in ferrous and non-ferrous materials
• Slow spiral flute promotes controlled chip evacuation in difficult-to-machine materials
• Web-thinned parallel web reduces cutting resistance at the chisel edge
• Diameter tolerance held to +0.0000 to -0.0005 inches for close-tolerance hole requirements

Compatibility

Designed for drilling cast iron, non-ferrous metals, stainless steel, and carbon steel. The straight-cylindrical shank fits standard drill chucks compatible with 0.2165-inch shank tooling. Suitable for use in CNC machining centers, drill presses, and screw machines within the 0.2000 to 0.2500 inch drill bit size range.

Installation Notes

Installation and use should be performed by qualified machinists or tooling professionals familiar with carbide cutting tools. Ensure the machine spindle and chuck are powered down and fully stopped before changing tooling. Solid carbide bits are brittle compared to HSS and should not be subjected to lateral loads or used in hand-held drills. Verify chuck runout is within acceptable limits before use, as excessive runout accelerates edge chipping on carbide tooling.