Precision Twist Drill 5998530 Jobber Drill Bit 11/32 in Hss

Product Description

The PRECISION TWIST DRILL 5998530 is a jobber-length drill bit designed for general-purpose drilling in a wide range of materials. It is manufactured from high speed steel (HSS) with a bright, uncoated finish and features a standard 118-degree point angle with a web-thinned, tapered web configuration for improved penetration and reduced thrust. The straight-cylindrical shank measures 11/32 inch (0.3438 inch decimal) in diameter, matching the bit diameter. Overall length is 4.75 inches with a flute length of 3.4375 inches, making it suitable for moderate-depth drilling applications. This bit is a right-hand cut, two-flute spiral design in the R10P-R15P-R18P series.

This drill bit is intended for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It follows ANSI standards and is classified as a general-purpose tool appropriate for machine shop, maintenance, and field drilling tasks. Machinists, pipefitters, plumbers, electricians, and HVAC technicians commonly use jobber-length HSS bits like this one for drilling through metal pipe, sheet metal, junction boxes, and structural steel during installation and service work.

Key Features

• 11/32 inch (0.3438 inch) diameter, jobber-length proportions for general drilling reach
• High speed steel construction rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• 118-degree standard point angle with web-thinned, tapered web for reduced entry force
• Right-hand cut, two-flute regular spiral for efficient chip evacuation
• Bright uncoated finish; overall length 4.75 inches, flute length 3.4375 inches
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill chuck accepting an 11/32 inch straight-cylindrical shank, including benchtop drill presses, hand drills, and magnetic base drills used in trade applications.

Installation Notes

Secure the straight-cylindrical shank firmly in a properly sized chuck before operation and verify the chuck key is removed prior to starting the drill. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to extend tool life, even though this bit does not have internal coolant-through capability. Wear ANSI-rated eye protection and secure the workpiece to prevent rotation. Inspect the cutting edges before each use and replace the bit if chipping or heat discoloration is present.