Precision Twist Drill 5999174 Wire Size 70 Hss Drill Bit

Product Description

The PRECISION TWIST DRILL 5999174 is a jobber-length drill bit sized at wire gauge 70, with a decimal diameter of 0.0280 inches. It is ground from high speed steel and finished with a steam oxide coating to reduce friction and improve chip evacuation in ferrous materials. The bit features a standard 118-degree split-point angle, a regular spiral flute, and a straight-cylindrical shank at 0.0280 inches in diameter. Overall length is 1.25 inches with a flute length of 0.375 inches. The tapered web and web-thinned geometry reduce thrust force when drilling small-diameter holes. Machinists, tool-and-die techs, and HVAC or electrical tradespeople reach for this size when precision small-hole work is required.

The 5999174 is designed for drilling operations in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Its general-purpose grade and ANSI-standard geometry make it a standard fit in drill indexes used across light manufacturing, sheet-metal work, and field service applications where wire-gauge holes are called out on prints. The 13xD flute-to-diameter ratio and 0.375-inch maximum drilling depth suit it to shallow through-holes in thin stock and sheet material.

Key Features

• Wire gauge 70 size, 0.0280-inch decimal diameter for precision small-hole drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction rated for steel, stainless, cast iron, non-ferrous metals, superalloys, and titanium
• Steam oxide coating reduces friction and provides mild corrosion resistance during storage
• Regular spiral, 2-flute design promotes chip clearing in shallow holes up to 0.375 inches deep
• Straight-cylindrical shank fits standard drill chucks; ANSI-compliant geometry

Compatibility

Designed as an OEM-style jobber-length drill bit conforming to ANSI standards in the R10-R15-R18 series, suitable for use in standard drill chucks and CNC tool holders that accept a 0.0280-inch straight-cylindrical shank.

Installation Notes

Install and remove this bit with the drill, press, or CNC spindle fully powered down and locked out per applicable safety procedures. Secure the straight-cylindrical shank firmly in a properly sized collet or keyless chuck before beginning any drilling operation. Use appropriate cutting fluid or coolant when drilling stainless steel, titanium, or other hard materials to extend tool life, even though this bit is not rated for coolant-through delivery. Inspect the cutting edges before each use; at 0.0280 inches diameter, the bit is susceptible to breakage if subjected to side loading or excessive feed pressure.