Precision Twist Drill 5995920 Jobber Drill Bit No. 1

Product Description

The PRECISION TWIST DRILL 5995920 is a No. 1 wire-size jobber-length drill bit designed for general-purpose drilling in demanding materials. Built from high speed steel with a bronze coating, it features a 135-degree split point and web-thinned, tapered web geometry that reduces walking and improves penetration on harder workpieces. The straight-cylindrical shank measures 0.2280 inches in diameter and 1.25 inches in length. Overall length is 3.875 inches with a 2.625-inch spiral flute. Right-hand cutting direction and a regular spiral type make this bit compatible with standard drill presses and hand-held power drills. It is sized at 0.2280 inches in decimal equivalent. Licensed HVAC techs, machinists, plumbers, and general tradespeople install this bit in production and field service applications.

This jobber drill bit is suited for drilling into steel, stainless steel, cast iron, superalloys, and titanium. It falls within the HX10-HX15-HX18 series and is built to ANSI standards. The 12xD flute-to-diameter ratio and 2.625-inch maximum drilling depth make it a practical choice for through-hole and blind-hole work in metal fabrication, mechanical assembly, and field service environments where wire-gauge sizing is required.

Key Features

• No. 1 wire size with 0.2280-inch decimal diameter for precise gauge-specific drilling
• 135-degree split point with web thinning reduces thrust and minimizes bit walking on hard materials
• High speed steel construction with bronze coating for improved wear resistance and heat dissipation
• Right-hand spiral flute, 2.625 inches long, efficiently clears chips during drilling
• Straight-cylindrical shank fits standard drill chucks without adapters
• Rated for steel, stainless steel, cast iron, superalloys, and titanium workpieces

Compatibility

Designed as a general-purpose jobber-length drill bit in the HX10-HX15-HX18 series, compatible with any standard drill chuck accepting a 0.2280-inch straight-cylindrical shank. Suitable for use in drill presses, hand-held power drills, and CNC drilling applications where No. 1 wire-gauge sizing is specified.

Installation Notes

Install and remove drill bits only after the drill or drill press has been fully powered down and brought to a complete stop. Secure the straight-cylindrical shank firmly in a properly rated chuck before operation. Eye protection and appropriate work-holding fixtures are required when drilling metals such as cast iron and stainless steel. Do not exceed the rated maximum drilling depth of 2.625 inches for this bit.