Precision Twist Drill 5996955 Wire 10 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5996955 is a jobber-length twist drill bit designed for general-purpose drilling in a wide range of metallic materials. Built from high-speed steel (HSS) with a bright uncoated finish, it carries a wire size designation of number 10, corresponding to a decimal diameter of 0.1935 inches. The 135-degree split point reduces walking on entry and lowers thrust requirements compared to a standard 118-degree point. The parabolic spiral flute geometry with web thinning promotes efficient chip evacuation. Overall length is 3.625 inches with a 2.4375-inch flute length, and the straight-cylindrical shank measures 0.1935 inches in diameter. Licensed machinists, maintenance mechanics, and metal fabricators install this bit in standard drill presses and hand drills.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium in both production and maintenance environments. The QC21P series is classified as a heavy-duty, general-purpose tool conforming to ANSI standards. It is a single-piece, individually packaged bit appropriate for shop use wherever a wire-gauge number 10 hole is required. The 13xD flute-to-diameter ratio supports deeper drilling passes before chip clearance becomes an issue.

Key Features

• Wire size number 10 — 0.1935-inch decimal diameter for precise wire-gauge hole sizing
• 135-degree split point reduces thrust and minimizes bit walking on curved or hard surfaces
• High-speed steel construction provides heat resistance during sustained metal drilling
• Parabolic spiral flute with web thinning improves chip evacuation and reduces heat buildup
• Straight-cylindrical shank fits standard three-jaw drill chucks without adapters
• ANSI-conforming QC21P series built to heavy-duty grade tolerances

Compatibility

Designed as an OEM-style jobber-length drill bit for use in standard drill presses, handheld electric drills, and drill drivers fitted with a chuck that accepts a 0.1935-inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists and metal fabricators working under general machine-shop or MRO practices. Secure the shank fully in the chuck before drilling and verify chuck key removal before powering the machine. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to extend tool life, even though this bit does not support through-coolant delivery. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.