Cleveland C70135 Cobalt Jobber Drill Bit 0.2210 in

Product Description

The CLEVELAND C70135 is a cobalt jobber-length drill bit designed for production drilling in hard and abrasive materials. Built to M42 cobalt high-speed steel grade, it delivers heat resistance and edge retention beyond standard HSS bits. The split point geometry at 135 degrees reduces walking and requires no center punch on most surfaces. Gold oxide coating further extends tool life by reducing friction at the cutting edge. With a straight-cylindrical shank diameter of 0.2210 inches and an overall length of 3-7/8 inches, it fits standard three-jaw chucks on drill presses and hand drills. This is a heavy-duty grade bit intended for professional shop and field use.

The C70135 is sized to wire gauge number 2, with a decimal diameter of 0.2210 inches. Its primary rated workpiece material is aluminum, and the split point with web thinning makes it well suited for non-ferrous metals, plastics, and composite materials common in aerospace and industrial fabrication. The regular spiral flute with a 2-5/8 inch flute length clears chips efficiently during through-hole drilling. This bit conforms to NAS 907 Type J standards, making it appropriate for applications where specification compliance is required.

Key Features

• M42 cobalt high-speed steel construction for superior heat and wear resistance
• 135-degree split point with web thinning reduces thrust and eliminates walking
• Gold oxide coating lowers friction and extends cutting edge life
• Right-hand spiral flute at 2-5/8 inches promotes efficient chip evacuation
• Straight-cylindrical shank at 0.2210 inches fits standard drill chucks
• Meets NAS 907 Type J specification for controlled-application use

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for applications requiring a 0.2210 inch diameter, wire size number 2, heavy-duty cobalt bit conforming to NAS 907 Type J standards.

Installation Notes

Installation of this bit is performed by machinists and trade technicians using standard drill presses, CNC drilling equipment, or hand-held power drills with a compatible three-jaw chuck. Secure the straight shank fully in the chuck before operation and verify chuck key removal before engaging power. Use appropriate cutting fluid for the workpiece material to maintain bit temperature and edge life. Follow shop safety protocols including eye protection and secure workpiece fixturing at all times.