Cleveland C70143 Jobber Length Drill Bit Wire 10 Cobalt

Product Description

The CLEVELAND C70143 is a jobber-length drill bit in wire size 10, measuring 0.1935 inches in diameter, designed for precision drilling in metalworking and fabrication applications. Built from M42 cobalt high-speed steel and finished with a gold oxide coating, it delivers heat and wear resistance suited to demanding materials. The 135-degree split point reduces walking on entry and requires no center punch on most surfaces. With an overall length of 3.625 inches and a 2-7/16-inch flute length, this bit fits standard drill chucks and magnetic drills used by machinists, maintenance techs, and production floor professionals.

This bit is well suited to drilling aluminum, non-ferrous metals, stainless steel, and high-strength alloys where a standard HSS bit would wear prematurely. The regular spiral flute and tapered web configuration promote efficient chip evacuation in through-hole and blind-hole operations. It conforms to NAS 907 Type J standards, making it appropriate for aerospace-grade and precision manufacturing environments. The straight-cylindrical shank seats cleanly in 3-jaw chucks and quick-change chuck systems without slippage under normal feed rates.

Key Features

• M42 cobalt steel construction provides superior heat resistance over standard M2 HSS bits
• 135-degree split point reduces thrust force and eliminates center-punch requirement on most metals
• Gold oxide coating reduces friction and extends cutting edge life in abrasive materials
• Web-thinned, tapered web configuration improves chip flow and reduces torque demand
• NAS 907 Type J compliant for use in aerospace and precision manufacturing specifications
• Straight-cylindrical shank at 0.1935 inches diameter fits standard 3-jaw and quick-change chuck systems

Compatibility

Designed as an OEM-style replacement or direct-use jobber-length drill bit for wire size 10 applications per NAS 907 Type J specification, compatible with any standard drill press, hand drill, or CNC drilling setup accepting a 0.1935-inch straight-cylindrical shank.

Installation Notes

This bit is installed by machinists and metalworking technicians using standard drill presses, CNC machining centers, or hand-held power drills. Ensure the chuck is fully tightened and the workpiece is securely fixtured before drilling to prevent bit deflection or breakage. Use appropriate cutting fluid or coolant for the workpiece material to maximize bit life, particularly when drilling stainless steel or high-strength alloys. Inspect the cutting edges before use and replace the bit if chipping or dulling is observed.