Cleveland C14659 Drill Bit Letter J 0.277 in Cobalt

Product Description

The CLEVELAND C14659 is a cobalt screw machine length drill bit sized at Letter J (0.2770 inches) with a 135-degree split point and web-thinned geometry. Built from M42 cobalt high-speed steel, it delivers the heat resistance and edge retention needed for drilling alloy steels, aluminum, and other demanding workpiece materials. The straight-cylindrical shank measures 0.2770 inches in diameter and the overall length is 2-11/16 inches, keeping the bit compact and rigid for close-clearance drilling operations. Two spiral flutes with a regular helix promote chip evacuation in both hand-held and machine setups. This is a heavy-duty grade tool suited for production machining environments and professional metalworking applications.

The C14659 is designed for screw machine length applications where a shorter overall length provides greater rigidity and reduced deflection compared to jobber-length bits. It is well suited for drilling alloy steels and aluminum in CNC machining centers, drill presses, and turret lathes. The 1-1/2 inch flute length and 1-3/16 inch shank length give machinists and tool-and-die professionals a controlled drilling geometry for accurate hole placement in close-tolerance work. Right-hand cutting direction is standard for conventional drill press and machine tool spindle rotation.

Key Features

• M42 cobalt construction for heat resistance and extended tool life in hard and abrasive materials
• 135-degree split point with web thinning reduces thrust force and self-centers on the workpiece
• Screw machine length (2-11/16 inches OAL) provides added rigidity over jobber-length bits
• Straight-cylindrical shank at 0.2770 inches fits standard drill chucks without an adapter
• Two-flute regular spiral design promotes efficient chip clearing in ferrous and non-ferrous metals
• Meets ASME B94.11M and DIN 1897 standards for dimensional and performance consistency

Compatibility

Designed for use in standard drill chucks and machine tool spindles accepting a 0.2770-inch straight-cylindrical shank. Primary workpiece materials listed by the manufacturer are alloy steel and aluminum. No specific machine model compatibility is stated by the manufacturer for this part.

Installation Notes

Installation and use of this drill bit should be performed by machinists or qualified metalworking professionals familiar with machine tool operation and cutting tool setup. Secure the shank fully in the drill chuck and verify runout before beginning a cut. Always wear appropriate eye protection and follow applicable shop safety procedures. Do not exceed the recommended feed and speed parameters for the workpiece material and machine spindle rating.