Cleveland C11681 Jobber Drill Bit No. 27 Hss

Product Description

The CLEVELAND C11681 is a No. 27 wire-size jobber-length drill bit designed for precision drilling in steel, aluminum, and non-ferrous materials. Built from high speed steel (HSS) with a bright, uncoated finish, it features a 135-degree split point that self-centers on contact and reduces walking without a center punch. The web-thinned, tapered web construction lowers thrust requirements and improves chip evacuation. Overall length is 3.0 inches with a 1.875-inch flute length. This is a heavy-duty grade bit suitable for production and maintenance drilling environments where consistent hole quality matters.

The C11681 is rated for drilling steel, aluminum, and general non-ferrous workpieces. Its 0.1440-inch diameter corresponds to a No. 27 wire gauge, a size commonly used for tapping and clearance holes in light to medium metalworking, sheet metal fabrication, and mechanical assembly. The right-hand, regular spiral flute geometry suits general-purpose drilling on drill presses, hand drills, and CNC applications at standard cutting speeds for HSS tooling.

Key Features

• No. 27 wire size with 0.1440-inch decimal diameter and tight tolerance of -0.0007 to 0.0000 inches
• 135-degree split point self-centers and reduces thrust on entry
• Web-thinned tapered web for lower drilling resistance and improved chip flow
• High speed steel construction, bright/uncoated finish for general-purpose metalworking
• Right-hand regular spiral flute, straight cylindrical shank for standard chuck compatibility
• Meets NAS 907 Type B specification, heavy-duty grade

Compatibility

Designed as a standard jobber-length replacement drill bit for use in any drill press, hand drill, or CNC spindle accepting a 0.1440-inch straight shank. Suitable for production and maintenance applications drilling steel, aluminum, and non-ferrous metals.

Installation Notes

Installation is performed by machinists, toolmakers, or maintenance technicians using a standard three-jaw or collet chuck. Ensure the shank is fully seated and the chuck is tightened securely before operation. Select appropriate cutting speed and feed rate for the workpiece material and bit diameter per standard HSS machining references. Inspect the cutting edges for wear before reuse; a worn split point increases thrust and reduces hole accuracy.