Cleveland C15074 Screw Machine Drill Bit 7/16 in Cobalt

Product Description

The CLEVELAND C15074 is a screw machine length drill bit designed for high-production drilling in alloy steels, aluminum, and other demanding workpiece materials. Built from M42 cobalt high-speed steel, it delivers superior heat and wear resistance compared to standard HSS tooling. The 135-degree split point reduces thrust and eliminates the need for a center punch on most materials. With an overall length of 3-7/16 inches and a straight cylindrical shank measuring 0.4375 inches in diameter, this bit fits standard drill chucks and CNC toolholding systems. The parabolic flute geometry promotes efficient chip evacuation in deeper holes.

This bit is suited for shop and field drilling operations where stub-length rigidity is preferred over jobber-length flexibility. The screw machine length profile reduces deflection in tight or confined setups, making it a common choice for drill press, turret lathe, and CNC machining center applications. Primary workpiece materials listed by the manufacturer include alloy steels and aluminum. The web-thinned, parallel web configuration helps maintain center cutting action throughout the tool life.

Key Features

• M42 cobalt construction resists heat buildup during high-speed and interrupted cutting
• 135-degree split point reduces entry thrust and self-centers without a pilot
• Parabolic flute design improves chip flow and reduces chip packing
• Web-thinned parallel web extends cutting efficiency as the bit wears and is resharpened
• Straight cylindrical shank is compatible with standard and CNC chuck systems
• Meets ASME B94.11M standards with ANSI specification designation

Compatibility

The C15074 is listed under Cleveland Series 2175A and is intended for drilling alloy steels and aluminum. Designed as a direct-fit screw machine length bit for any standard drill chuck or toolholder accepting a 0.4375-inch straight cylindrical shank.

Installation Notes

Install in a properly sized drill chuck or collet and verify runout before production drilling. Secure workpieces firmly to prevent walking on entry, particularly in aluminum. Follow applicable shop safety standards and use appropriate cutting fluid for the workpiece material to extend tool life. Inspect the cutting edges before each use and regrind or replace when point geometry shows wear.