Cleveland C70285 Drill Bit Letter G 135 Point Hss

Product Description

The CLEVELAND C70285 is a screw machine length drill bit sized to Letter G (0.2610 inches) and ground to a 135-degree split point. It is manufactured from high-speed steel with a bright uncoated finish, making it well suited for high-speed drilling in production and repair environments. The stub-length body keeps the bit rigid, reducing deflection in short-reach applications. Two spiral flutes with web thinning promote chip evacuation and reduce thrust at the cutting edge. Licensed machinists, maintenance mechanics, and metalworking trades rely on this Series 2330 bit for accurate, repeatable hole sizing in ferrous and non-ferrous materials.

This bit is built for screw machine and general metalworking applications where a shorter overall length provides extra rigidity and positional accuracy. Primary workpiece materials include alloy steel and aluminum. The straight-cylindrical shank fits standard drill chucks and collet-style holders on benchtop drill presses, CNC turret machines, and handheld power drills. Its heavy-duty grade designation makes it appropriate for production-rate drilling where bit longevity matters.

Key Features

• Letter G size — 0.2610 inches diameter with a tolerance of +0.0000 to -0.0010 inches
• 135-degree split point reduces walking and lowers required thrust force
• Web-thinned parallel web configuration improves chip clearance
• High-speed steel construction rated for alloy steel and aluminum workpieces
• Screw machine (stub) length — 2.625 inches OAL — maximizes rigidity in tight setups
• Meets ASME B94.11M and NAS 907 Type C specifications

Compatibility

Designed as an OEM-style replacement or direct-use screw machine length drill bit compatible with any standard drill chuck or straight-shank collet holder accepting a 0.2610-inch shank diameter.

Installation Notes

Installation of drill bits should be performed by qualified machinists or mechanics following applicable shop safety procedures. Always power down and lock out the drilling machine before securing or removing a bit from the chuck or collet holder. Ensure the shank is fully seated and the chuck is tightened evenly to prevent runout. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole-size tolerance.