Precision Twist Drill 5998249 Jobber Drill Bit 26 Hss

Product Description

The PRECISION TWIST DRILL 5998249 is a jobber-length drill bit in wire gauge size 26, with a decimal diameter of 0.1470 inches, manufactured from high speed steel with a bright uncoated finish. It features a standard 118-degree split-point angle and a right-hand spiral flute configuration designed for efficient chip evacuation during through-hole and blind-hole drilling operations. With an overall length of 3 inches and a flute length of 1.875 inches, this bit is suited for production drilling in metal fabrication, maintenance, and light manufacturing environments. Licensed trades and machining professionals install this type of bit in drill presses, CNC machines, and handheld power drills.

This jobber-length bit is intended for drilling steel, cast iron, non-ferrous metals, superalloys, and titanium. The regular spiral flute and tapered web configuration make it a general-purpose tool for a wide range of hole-making tasks. The straight cylindrical shank diameter of 0.1470 inches fits standard drill chucks without adapters. Typical applications include pilot holes, clearance holes, and precision hole layouts in sheet metal, structural components, and machined parts. The series designation R10H-R18H covers general-purpose high speed steel jobber bits meeting ANSI standards.

Key Features

• Wire gauge size 26, decimal diameter 0.1470 inches for precise small-hole drilling
• 118-degree standard point angle for general-purpose metal drilling
• High speed steel construction with bright uncoated finish
• Right-hand cut with regular spiral flutes for efficient chip removal
• Tapered web with web-thinning for reduced thrust and cleaner entry
• Straight cylindrical shank compatible with standard drill chucks

Compatibility

Designed for use in steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces. Compatible with standard drill chucks accepting a 0.1470-inch straight cylindrical shank. Meets ANSI specification for jobber-length drill bits in the R10H-R18H series.

Installation Notes

Installation is performed by machinists, maintenance technicians, and metalworking tradespeople using drill presses, handheld power drills, or CNC equipment. Secure the straight shank firmly in a keyed or keyless chuck before operation. Use appropriate cutting fluid or coolant when drilling harder alloys such as superalloys and titanium to extend tool life. Inspect the cutting edges and point for wear or chipping before each use and replace the bit if the point is damaged.