Cleveland C70324 Screw Machine Drill Bit Size 20 Hss

Product Description

The CLEVELAND C70324 is a screw machine length drill bit designed for high-speed steel cutting applications in metalworking and fabrication environments. It is a wire gauge size 20 bit with a decimal diameter of 0.1610 inches, built to ASME B94.11M standards and carrying NAS 907 Type C designation. The 135-degree split point geometry reduces walking and allows clean entry without a center punch. Web-thinned construction lowers thrust requirements on entry. This bit is classified as heavy duty grade and is typically installed and used by machinists, maintenance mechanics, and tool-and-die professionals working with alloy steel, aluminum, and similar materials.

The C70324 fits standard screw machine length applications where a shorter, more rigid drill is preferred over jobber length. The 2.125-inch overall length and 1.0625-inch flute length make it well suited for drilling in tight setups, turret lathes, screw machines, and CNC applications requiring close-tolerance hole placement. The straight-cylindrical shank seats in standard drill chucks and collets without modification. It is intended for right-hand rotation and compatible with conventional drill press, lathe, and mill setups running appropriate speeds and feeds for HSS tooling.

Key Features

• Wire gauge size 20 with 0.1610-inch decimal diameter and tight tolerance of +0.0000 to -0.0007 inches
• 135-degree split point reduces thrust and eliminates center-punch requirement on most metals
• Web-thinned, parallel web configuration for reduced cutting resistance
• High-speed steel construction with bright uncoated finish, suitable for alloy steel and aluminum
• Screw machine length provides increased rigidity over jobber length in short-reach setups
• Meets ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed as a screw machine length replacement or production-use drill bit for right-hand drill presses, lathes, CNC mills, and turret machines accepting a 0.1610-inch straight-cylindrical shank. Rated for primary workpiece materials including alloy steel and aluminum.

Installation Notes

Installation is performed by machinists and tool operators. Seat the straight shank fully in the chuck or collet and verify runout before drilling. Always set spindle speed appropriate for HSS tooling and the workpiece material before starting the cut. Do not use this bit for interrupted cuts or hammer drilling applications.