Cleveland C70177 Jobber Drill Bit No. 44 Cobalt 135 Deg

Product Description

The CLEVELAND C70177 is a jobber-length drill bit in wire gauge size No. 44 (0.0860 inches decimal), manufactured from M42 cobalt high-speed steel with a gold oxide coating. It features a 135-degree split point for fast engagement and reduced walking on entry, and a two-flute regular spiral geometry for efficient chip evacuation. The straight-cylindrical shank measures 0.0860 inches in diameter and 1.0 inch in length. Overall length is 2.125 inches, with a flute length of 1.125 inches. This is a heavy-duty grade bit built for production drilling environments. Machinists, maintenance mechanics, and metalworking professionals are the primary installers.

The C70177 is suited for drilling aluminum and similar non-ferrous and ferrous materials where a small-diameter, high-precision hole is required. The M42 cobalt alloy composition provides elevated heat resistance compared to standard M2 HSS, making it appropriate for harder workpiece materials and higher-feed applications. The gold oxide finish reduces friction at the cutting edge. It is commonly used in production shops, MRO facilities, and aerospace-adjacent fabrication environments where NAS 907 Type J standards are specified.

Key Features

• M42 cobalt HSS construction for superior heat and wear resistance over standard high-speed steel
• 135-degree split point reduces thrust and eliminates the need for a center punch on most materials
• Gold oxide coating lowers friction and extends cutting edge life
• Web-thinned, tapered web configuration improves chip flow and reduces cutting torque
• Straight-cylindrical shank fits standard drill chucks and collets without modification
• Meets NAS 907 Type J specification for aerospace and precision manufacturing use

Compatibility

Designed as an OEM-style replacement or production consumable for any application requiring a No. 44 wire gauge jobber-length drill bit with a straight-cylindrical shank. Meets NAS 907 Type J standards as stated in the product specifications.

Installation Notes

Install in a drill press, CNC machining center, or hand drill with a chuck rated for the 0.0860-inch shank diameter. Ensure the workpiece is securely fixtured before drilling. Apply cutting fluid appropriate to the workpiece material to maximize bit life, particularly when drilling ferrous metals. Inspect the cutting edges for wear or chipping before each use and replace the bit when the split point shows signs of breakdown.