Precision Twist Drill 5998023 Jobber Drill Bit 5/32 in

Product Description

The PRECISION TWIST DRILL 5998023 is a jobber-length twist drill bit designed for general-purpose drilling in a wide range of materials. The bit measures 5/32 inch (0.1563 inch) in diameter with an overall length of 3.125 inches and a flute length of 2 inches. Constructed from high speed steel with a steam oxide coating, it features a 135-degree split point, a regular spiral flute, and a straight-cylindrical shank. The web-thinned, tapered web geometry reduces entry force and improves chip evacuation. Licensed tradespeople and maintenance professionals reach for this bit when working through steel, cast iron, non-ferrous metals, and hard alloys.

This drill bit is suited for production and maintenance drilling tasks in metalworking, HVAC fabrication, plumbing, and electrical rough-in work. The 135-degree point angle self-centers on curved or flat metal surfaces without a center punch in many applications, reducing setup time. The steam oxide finish provides mild lubricity and corrosion resistance during storage and use. It meets ANSI standards and conforms to NAS 907 specification, making it appropriate for aerospace-adjacent and heavy-duty shop applications where dimensional accuracy and material compliance are required.

Key Features

• High speed steel construction for durability across ferrous and non-ferrous workpieces
• 135-degree standard point angle with web thinning for reduced thrust and self-centering entry
• Steam oxide coating provides mild lubricity and corrosion resistance
• Right-hand cut, 2-flute regular spiral flute for efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks
• Meets ANSI standards and NAS 907 specification for dimensional accuracy

Compatibility

Designed for use in standard 3-jaw drill chucks accepting a straight-cylindrical shank. Suitable for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Part of the R10B-R15B-R18B series from PRECISION TWIST DRILL.

Installation Notes

Install in a properly rated drill press, hand drill, or right-angle drill with a chuck capacity that accepts a 5/32-inch straight shank. Secure the workpiece before drilling and use appropriate cutting fluid when working with stainless steel, superalloys, or titanium to extend tool life. Inspect the cutting edges before each use and replace the bit if chipping or dullness is observed. Dispose of worn bits in accordance with local shop safety protocols.