Cleveland C71311 Jobber Length Drill Bit 11.2 Mm Hss

Product Description

The CLEVELAND C71311 is a jobber-length twist drill bit manufactured from high speed steel with an oxide coating for added surface hardness and corrosion resistance. It measures 11.2 mm (0.4409 inches) in diameter with a 118-degree standard point angle and a two-flute regular spiral design for efficient chip evacuation. Overall length is 5.591 inches, with a flute length of 3.701 inches. The straight-cylindrical shank measures 0.4528 inches in diameter. This drill bit is designed for general-purpose metal drilling applications and is installed by machinists, maintenance technicians, and trade professionals working with standard drill presses, lathes, or handheld drilling equipment.

The C71311 is suited for general-purpose drilling in ferrous and non-ferrous metals, plastics, and similar materials in shop, field, and maintenance environments. It carries the Series 2001G designation and conforms to ASME B94.11M and DIN 338 standards, making it appropriate for both domestic and internationally specified work. The 4xD flute-to-diameter ratio provides adequate chip clearance for through-hole drilling at this diameter range. The web-thinned, tapered web configuration reduces thrust and improves centering at the start of the cut.

Key Features

• 11.2 mm (0.4409 inches) diameter with a diameter tolerance of -0.0010 to 0.0000 inches for consistent fit
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction with oxide coating for surface protection and extended service life
• Two-flute regular spiral design with 3.701-inch flute length for efficient chip removal
• Straight-cylindrical shank at 0.4528 inches diameter fits standard drill chucks
• Conforms to ASME B94.11M and DIN 338 standards; Series 2001G general-purpose grade

Compatibility

Designed as a general-purpose jobber-length drill bit suitable for use in standard drill chucks accepting a straight-cylindrical shank in the 0.4000 to 0.5000 inch diameter range.

Installation Notes

Secure the shank firmly in a properly sized drill chuck before operation and verify chuck key removal before starting the spindle. Ensure workpieces are clamped or fixtured to prevent rotation during drilling. Use appropriate cutting fluid or coolant when drilling ferrous metals to prolong tool life and maintain dimensional accuracy. Inspect the cutting edges and point before each use and replace the bit if chipping or dulling is observed.