Cleveland C15057 Cobalt Screw Machine Drill Bit 11/64 in

Product Description

The CLEVELAND C15057 is a cobalt screw machine length drill bit designed for high-speed, production-style drilling in demanding materials. Built to ASME B94.11M standards and designated M42 material grade, this bit measures 11/64 inches (0.1719 inches decimal) in diameter with a 2-1/8 inch overall length. The 135-degree split point self-centers on contact, reducing walking and the need for a center punch. A parabolic flute design improves chip evacuation, making this bit well-suited for interrupted or deep drilling cycles where heat and chip buildup are common concerns. Licensed tradespeople and machinist-trained technicians are the primary installers.

This bit is intended for right-hand cutting in alloy steels, aluminum, and similar workpiece materials. The screw machine length profile — shorter than a jobber-length bit — provides added rigidity and reduced deflection, which is especially useful on drill presses, CNC machines, and manual lathes where chatter control matters. The straight-cylindrical shank fits standard drill chucks. It is appropriate for both production shop environments and field maintenance operations where hole consistency and bit longevity under repeated use are priorities.

Key Features

• M42 cobalt construction provides heat resistance during high-speed or hard-material drilling
• 135-degree split point self-centers and reduces thrust force required at entry
• Parabolic flute geometry promotes fast, efficient chip evacuation
• Web-thinned, parallel web configuration reduces cutting resistance
• Screw machine length body adds rigidity and minimizes deflection versus jobber-length bits
• Meets ASME B94.11M standards with ANSI specification designation

Compatibility

Part of the Cleveland Series 2175A screw machine drill bit line. Designed for use in standard drill chucks accepting a 0.1719-inch straight-cylindrical shank. Suitable for alloy and aluminum workpiece materials as specified by the manufacturer.

Installation Notes

Installation is performed by machinists, maintenance technicians, or skilled tradespeople operating drill presses, lathes, or CNC equipment. Secure the shank fully in the chuck and confirm concentricity before operation. Power down and de-energize all equipment before changing bits. Do not exceed the rated speed range for the workpiece material, and use appropriate cutting fluid to prolong bit life and maintain hole tolerance.