Cleveland C16628 Cobalt Jobber Drill Bit Wire Size 16

Product Description

The CLEVELAND C16628 is a cobalt jobber length drill bit designed for heavy-duty metal drilling applications. Built to M42 cobalt material grade, this bit delivers increased heat and wear resistance compared to standard high-speed steel. The 135-degree split point reduces walking and cutting force at entry, making it well suited for hard and abrasive materials. A titanium nitride (TiN) coating adds surface hardness and extends tool life. The parabolic flute geometry improves chip evacuation and helps maintain cutting efficiency in deeper holes. Right-hand cut, 0.177 inch diameter, with an overall length of 3.375 inches.

This drill bit is used in metalworking, fabrication, and maintenance applications where harder steels, stainless alloys, or high-strength materials are being drilled. The wire size 16 designation (0.177 inch decimal) fits standard jobber-length chuck sizes. It is a common choice for HVAC, plumbing, and electrical tradespeople when drilling through structural steel, angle iron, strut channel, or equipment housings. The straight-cylindrical shank seats in standard 3-jaw drill chucks without modification.

Key Features

• M42 cobalt construction provides superior heat resistance for drilling hard metals
• 135-degree split point reduces thrust and eliminates center-punching in most applications
• TiN coating increases surface hardness and extends cutting life
• Parabolic flute design improves chip evacuation and reduces clogging in deep holes
• Web-thinned tapered web configuration reduces cutting resistance
• Meets ASME B94.11M and DIN 338 standards

Compatibility

Designed as a jobber-length replacement drill bit for use in standard 3-jaw drill chucks accepting a 0.177 inch straight-cylindrical shank, consistent with ASME B94.11M and DIN 338 jobber-length specifications.

Installation Notes

Install in a standard drill chuck and tighten securely with a chuck key before operation. Use appropriate cutting fluid or coolant when drilling hard alloys to prevent premature bit wear, even though this bit is not coolant-through rated. Always secure workpieces firmly before drilling to prevent movement. Follow applicable shop safety practices and wear appropriate eye protection when operating rotary cutting tools.