Precision Twist Drill 5998035 Jobber Drill Bit No. 53

Product Description

The PRECISION TWIST DRILL 5998035 is a wire gauge No. 53 jobber length drill bit ground from high speed steel with a bright uncoated finish. It carries a 118-degree standard point angle and a regular spiral flute pattern with web thinning for reduced thrust during entry. The straight-cylindrical shank measures 0.0595 inches in diameter and seats cleanly in standard drill chucks. Overall length is 1.875 inches with a flute length of 0.875 inches, yielding a 15xD flute-to-diameter ratio suited to general-purpose through-hole drilling. Machinists, maintenance technicians, and metal fabricators install this bit in handheld drills, drill presses, and CNC machines alike.

This bit is rated for drilling steel, cast iron, non-ferrous metals, and superalloys including titanium. It follows ANSI standards and belongs to the R10H-R18H series, placing it in the general-purpose performance tier appropriate for production and maintenance applications. Typical uses include pilot holes, through-holes, and clearance holes in sheet metal and structural stock where a No. 53 wire gauge diameter is called out on a print or assembly spec.

Key Features

• Wire gauge No. 53 diameter: 0.0595 inches for precise wire-gauge-spec hole sizing
• 118-degree standard point angle with web thinning for reduced entry thrust
• High speed steel construction for durability across steel, cast iron, and non-ferrous materials
• Regular spiral, 2-flute design promotes chip evacuation in through-hole drilling
• Straight-cylindrical shank compatible with standard drill chucks, no flat required
• ANSI-compliant geometry; R10H-R18H series general-purpose grade

Compatibility

Designed as a general-purpose jobber length drill bit suitable for use in handheld power drills, benchtop drill presses, and CNC drilling applications calling for a wire gauge No. 53 diameter. Compatible workpiece materials include steel, cast iron, non-ferrous metals, and superalloys and titanium.

Installation Notes

Insert the straight-cylindrical shank fully into the drill chuck and tighten securely before starting the spindle. Apply appropriate cutting fluid or lubricant when drilling steel or superalloys to extend tool life and maintain hole quality. Always wear eye protection and secure the workpiece firmly before drilling. Inspect the bit for chipping or wear before each use; a damaged cutting edge should be replaced or resharpened before returning to service.