Cleveland C71158 Jobber Drill Bit Wire Size 58 Hss

Product Description

The CLEVELAND C71158 is a wire-gauge jobber length drill bit sized to wire size 58 (0.0420 inches decimal equivalent). Built from high speed steel with an oxide finish, this two-flute bit handles general-purpose drilling in metal, plastic, and wood. The right-hand spiral flute geometry evacuates chips efficiently during through-hole and blind-hole operations. Overall length is 1-5/8 inches with a flute length of 11/16 inches. The straight-cylindrical shank (0.0420 inches diameter) seats securely in standard drill chucks. Tolerance is held to -0.0005 to 0.0000 inches on diameter, providing consistent hole sizing in production and repair work.

This bit is suited for light-duty precision drilling tasks common in HVAC, electrical, plumbing, and general fabrication work where small-diameter wire-gauge holes are required. The Series 2001G design follows ASME B94.11M and DIN 338 standards, making it appropriate for any shop or field environment that demands a dimensionally consistent, general-purpose jobber bit in the sub-0.0500 inch range. Web-thinned construction reduces thrust when starting holes in harder materials.

Key Features

• Wire size 58 designation — 0.0420 inches decimal diameter for precise small-hole applications
• High speed steel construction with oxide coating for corrosion resistance and reduced friction
• Right-hand cut, regular spiral, two-flute design for efficient chip evacuation
• Web-thinned, tapered-web point reduces entry thrust on harder workpieces
• Standard 118-degree point angle suits general-purpose drilling across common materials
• Meets ASME B94.11M and DIN 338 standards for dimensional consistency

Compatibility

Designed as a general-purpose jobber length drill bit for use in standard 3-jaw drill chucks accepting straight-cylindrical shanks in the sub-0.0500 inch diameter range.

Installation Notes

Secure the straight-cylindrical shank fully in a drill chuck before operation and verify the chuck key is removed prior to starting the spindle. Use appropriate drilling speeds for the workpiece material — smaller diameter bits require higher RPM and light feed pressure to avoid breakage. Cutting fluid or light oil is recommended when drilling ferrous metals to extend bit life. Inspect the point for wear regularly; a dull or chipped 118-degree point on a bit this small will cause walking and oversized holes.