Cleveland C70266 Screw Machine Drill Bit 19/64 in Hss

Product Description

The CLEVELAND C70266 is a screw machine length drill bit designed for high-production drilling in metal fabrication and machining applications. Built from high-speed steel with a bright, uncoated finish, this bit measures 19/64 inches (0.2969 inches) in diameter with a 2-3/4 inch overall length. The 135-degree split point reduces walking on contact and lowers thrust requirements, making it well-suited for drilling into alloy steel and aluminum. A parallel web configuration and web-thinned geometry contribute to clean entry and efficient chip evacuation. Licensed trades and machining professionals rely on this series for stub-length precision work where a shorter flute length improves rigidity and hole accuracy.

The C70266 is intended for screw machine, CNC, and manual drill press applications where a shorter-than-jobber bit improves performance in tight setups or fixtures. The straight cylindrical shank seats directly into standard drill chucks without adapters. Primary workpiece materials include alloy steel and aluminum, making this a practical choice for shops running mixed-material production runs. The 1-9/16 inch flute length and 1-3/16 inch shank length are optimized for stub drilling where depth is limited and rigidity is critical.

Key Features

• 19/64 inch (0.2969 inch) diameter with a tight tolerance of +0.0000 to -0.0010 inches
• 135-degree split point reduces thrust and minimizes bit walking on entry
• Web-thinned, parallel web design promotes clean chip evacuation
• High-speed steel construction rated for heavy-duty use in alloy steel and aluminum
• Screw machine (stub) length improves rigidity over standard jobber bits
• Conforms to ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed as an OEM-style replacement and standard-service screw machine drill bit for use in drill presses, CNC machining centers, and turret lathes accepting a 0.2969 inch straight cylindrical shank. Suitable for primary workpiece materials including alloy steel and aluminum as noted in the product specifications.

Installation Notes

Installation is performed by machinists or tool-and-die professionals. Secure the straight cylindrical shank firmly in a drill chuck or collet before use and verify runout is within acceptable limits for the application. Always power down and lock out the machine before changing bits. Follow shop safety protocols and applicable OSHA machine guarding standards when operating drilling equipment.