Cle-line C18084 No. 31 Hss Jobber Drill Bit 135 Deg

Product Description

The CLE-LINE C18084 is a No. 31 wire gauge jobber-length drill bit engineered for heavy-duty drilling in steel and cast iron. Built from high speed steel (HSS) with a black and gold oxide coating, it delivers consistent cutting performance and added surface protection against wear and corrosion. The 135-degree split point self-centers on contact, reducing walking and the need for a center punch on flat or curved workpieces. Overall length is 2.75 inches with a 1.625-inch flute length and a straight cylindrical shank at 0.1200 inches in diameter. Right-hand spiral flute geometry promotes efficient chip evacuation during through-hole and blind-hole operations.

This bit is suited for metalworking applications in both shop and field environments. It is a standard choice for drilling sheet metal, structural steel, cast iron components, and similar ferrous materials at the No. 31 wire gauge size (0.1200 inches). The tapered web configuration and web-thinned point reduce thrust requirements and make it well-suited for drill presses, hand drills, and cordless drivers used by machinists, pipefitters, electricians, and general tradespeople who need reliable, repeatable hole sizing in metal substrates.

Key Features

• No. 31 wire gauge size, 0.1200 inches decimal diameter with a tight tolerance of +0.0000 to -0.0005 inches
• 135-degree split point self-centers and reduces thrust, minimizing walking on hard surfaces
• High speed steel construction rated for heavy-duty grade drilling in ferrous metals
• Black and gold oxide coating provides added surface hardness and corrosion resistance
• Regular right-hand spiral flute with tapered, web-thinned geometry for efficient chip removal
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a standard jobber-length replacement drill bit for use in applications requiring a No. 31 wire gauge hole in steel and cast iron workpieces. Fits any drill press or handheld drill with a chuck capacity accommodating a 0.1200-inch straight shank.

Installation Notes

Installation is performed by machinists, pipefitters, electricians, or other tradespeople using a drill press or portable drill. Secure the shank fully in the chuck before use and verify chuck tightness. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life, even though this bit does not support internal coolant delivery. Follow applicable shop safety standards and wear eye protection during all drilling operations.