Cle-line C20528 Taper Shank Drill Bit 7/16 in Hss 1MT

Product Description

The CLE-LINE C20528 is a taper shank twist drill bit designed for general-purpose metal drilling in industrial and shop environments. Built from high-speed steel with an oxide finish, it delivers reliable performance across a broad range of ferrous and non-ferrous materials. The bit measures 7/16 inches in diameter, with an overall length of 7.25 inches and a flute length of 3.875 inches. The 118-degree standard point geometry suits most common drilling applications, while the web-thinned construction reduces thrust force and improves chip clearance at the cutting edge. Machinists and maintenance technicians are the primary installers of this tool.

This bit is suited for use in drill presses, milling machines, and lathes equipped with a Morse taper spindle or tailstock accepting a No. 1 Morse taper. It is well-suited for production drilling, maintenance repair operations, and fabrication tasks requiring a secure taper-fit shank connection. The right-hand spiral flute and regular helix angle promote efficient chip evacuation during through-hole and blind-hole drilling in mild steel, cast iron, aluminum, and similar materials.

Key Features

• 7/16 inch diameter with a tight tolerance of +0.0000 to -0.0010 inches for consistent hole sizing
• No. 1 Morse taper shank for positive self-holding engagement in compatible spindles
• 118-degree standard point angle for general-purpose drilling across common metals
• Web-thinned point reduces required thrust and improves cutting efficiency
• High-speed steel construction with oxide finish for corrosion resistance and heat dissipation
• Right-hand cutting, regular spiral flute for reliable chip removal

Compatibility

Designed for use in drill press spindles, lathe tailstocks, and milling machine quills that accept a No. 1 Morse taper shank.

Installation Notes

Installation and use should be performed by machinists or qualified maintenance technicians familiar with taper shank tooling. Ensure the spindle bore and taper shank are clean and free of chips or burrs before seating the bit; a properly seated Morse taper requires firm mallet engagement and a drift key for removal. Verify the machine spindle is fully stopped and de-energized before inserting or removing the bit. Always wear appropriate eye protection and follow applicable shop safety practices during drilling operations.