Cleveland C70194 Jobber Drill Bit Size 61 Cobalt

Product Description

The CLEVELAND C70194 is a wire gauge size 61 jobber length drill bit designed for precision drilling in metal fabrication, maintenance, and production applications. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit delivers extended tool life and heat resistance compared to standard HSS tooling. The 135-degree split point geometry reduces walking and allows drilling to start without a center punch. At 0.0390 inches in diameter and 1.625 inches overall length, this heavy-duty bit is suited for tight-tolerance work. It meets NAS 907 Type J standards and is installed by machinists, maintenance technicians, and trade professionals who require consistent hole quality in challenging materials.

This bit is designed for right-hand cutting with a regular spiral flute and a straight-cylindrical shank. Its primary application is drilling aluminum, though the M42 cobalt construction also handles stainless steel, high-nickel alloys, and other abrasion-resistant metals. The web-thinned, tapered web configuration reduces thrust requirements and improves chip evacuation. Typical use cases include sheet metal work, fixture fabrication, and production drilling where wire gauge hole sizes are required. This bit is sold individually but carries a minimum order quantity of 12 units.

Key Features

• M42 cobalt steel construction for heat resistance and extended tool life
• 135-degree split point reduces drill walking and lowers required thrust
• Gold oxide coating improves lubricity and corrosion resistance
• Web-thinned tapered web improves chip evacuation during drilling
• NAS 907 Type J compliant for use in aerospace and precision manufacturing environments
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a jobber length replacement drill bit for applications requiring wire gauge size 61 (0.0390 inches) holes, compatible with standard drill chucks accepting straight-cylindrical shanks of 0.0390 inches in diameter.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard keyed or keyless drill chuck. Ensure the chuck and spindle are rated for the shank diameter before use. Use appropriate cutting fluid or lubricant when drilling metals to manage heat buildup, particularly in stainless or high-alloy workpieces. Inspect the cutting edge before each use and replace bits showing signs of chipping or excessive wear to maintain hole tolerance.