Cleveland C70163 Cobalt Jobber Drill Bit No 30 135deg

Product Description

The CLEVELAND C70163 is a cobalt jobber-length drill bit in wire gauge size No. 30, designed for heavy-duty drilling in metal and alloy workpieces. Built from M42 cobalt high-speed steel with a gold oxide coating, this bit delivers improved heat resistance and wear life compared to standard HSS tooling. The split point tip at 135 degrees reduces walking on entry and minimizes the need for a center punch. With an overall length of 2.75 inches and a straight-cylindrical shank diameter of 0.1285 inches, the C70163 fits standard Jacobs-style chucks and collet holders. It meets NAS 907 Type J specification, making it suitable for aerospace and precision metalworking applications.

The C70163 is used in production and MRO drilling of aluminum, soft steel, and non-ferrous alloys in both shop and field environments. The 2-flute regular spiral design provides efficient chip evacuation in through-hole and blind-hole operations. The web-thinned, tapered web construction reduces thrust load, which is especially valuable when drilling aluminum or thin-wall stock. Machinists, maintenance technicians, and metalworking tradespeople will find this bit appropriate for drill presses, hand drills, and CNC drilling fixtures alike.

Key Features

• M42 cobalt steel construction for elevated heat and wear resistance
• 135-degree split point reduces walking and lowers entry thrust
• Gold oxide coating improves lubricity and extends tool life
• Web-thinned tapered web reduces cutting resistance in aluminum and soft metals
• Meets NAS 907 Type J specification for precision and aerospace applications
• Right-hand cut, regular spiral with 2 flutes for consistent chip clearing

Compatibility

Designed as an OEM-style jobber-length drill bit replacement for applications requiring wire gauge No. 30 diameter drilling per NAS 907 Type J standards. Fits any standard straight-shank drill chuck accepting a 0.1285-inch shank.

Installation Notes

Installation is performed by machinists and maintenance technicians using standard drill presses, hand drills, or CNC equipment. Secure the straight-cylindrical shank firmly in the chuck before operation and verify chuck key is removed prior to starting the machine. Do not exceed the recommended RPM range for the workpiece material and bit diameter. Use cutting fluid or coolant when drilling steel to extend bit life, noting this bit does not support through-coolant delivery.