Precision Twist Drill 5998004 Wire 30 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5998004 is a jobber-length drill bit in wire gauge size 30, with a decimal diameter of 0.1285 inches. Built from high-speed steel (HSS) with a bright, uncoated finish, it features a standard 118-degree split point and a web-thinned, tapered web for reduced thrust on entry. The spiral flute design and right-hand cut make it a general-purpose drilling tool suited for machinists, maintenance technicians, and fabricators working in production or job-site environments. Overall length is 2.75 inches, with a 1.625-inch flute length rated for drilling depths up to 1.625 inches.

This bit is suited for drilling into steel, cast iron, non-ferrous metals, superalloys, and titanium in general-purpose applications. The straight-cylindrical shank fits standard three-jaw drill chucks across a range of drill presses, CNC machines, and hand-held power drills. The flute-to-diameter ratio of 13xD supports chip evacuation in moderate-depth holes without coolant-through capability, making it appropriate for dry or flood-coolant setups in light to medium machining operations.

Key Features

• Wire gauge size 30, 0.1285-inch diameter for precision small-hole drilling
• 118-degree standard point angle with web-thinned tapered web reduces entry thrust
• High-speed steel construction supports drilling in steel, cast iron, non-ferrous metals, superalloys, and titanium
• Bright, uncoated finish compatible with dry or flood-coolant use
• Right-hand spiral flute, 1.625-inch flute length with 13xD flute-to-diameter ratio for efficient chip clearing
• Straight-cylindrical shank fits standard drill chucks; conforms to ANSI specifications

Compatibility

Designed as a general-purpose OEM-style replacement or direct-use jobber-length drill bit for standard three-jaw chucks in drill presses, hand-held power drills, and CNC drilling applications. Rated for use in steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces per Series R10H-R18H specifications.

Installation Notes

Installation of this bit should be performed by a qualified machinist or technician familiar with rotating tool safety practices. Secure the straight-cylindrical shank fully in a calibrated chuck and verify runout before drilling. Power down and de-energize the machine before changing bits. Follow applicable ANSI and shop-specific safety standards for speed and feed selection based on workpiece material.