Precision Twist Drill 5997004 No. 29 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5997004 is a No. 29 wire-gauge jobber-length drill bit machined from high-speed steel (HSS) with a bright, uncoated finish. It features a 135-degree split point that self-centers on contact, reducing walking on hard or smooth surfaces. The bit has a 0.136-inch diameter, an overall length of 2.875 inches, and a flute length of 1.75 inches. A regular spiral flute with web-thinned, tapered web geometry promotes efficient chip evacuation. This is a general-purpose right-hand cutting bit used by machinists, pipefitters, electricians, and maintenance mechanics for production and repair drilling operations.

The 5997004 is suited for drilling steel, aluminum, and other non-ferrous metals in general shop and field applications. The straight cylindrical shank seats directly in standard drill chucks without requiring collets or adapters. At 2.875 inches overall, it fits cordless and corded drill drivers, drill presses, and hand-held right-angle drills commonly used in mechanical and electrical trade work. The QC21P series targets general-purpose performance across a broad range of base metals and light alloys.

Key Features

• No. 29 wire size, 0.136-inch diameter — matches standard wire-gauge drill charts for tap and clearance hole sizing
• 135-degree split point self-centers and reduces thrust force compared to 118-degree conventional points
• High-speed steel construction provides toughness and heat resistance for metal drilling
• Bright uncoated finish for use with or without cutting fluid
• Web-thinned tapered web reduces cutting resistance and improves chip flow
• Right-hand, regular spiral flute with 13xD flute-to-diameter ratio for efficient chip evacuation in through-hole drilling

Compatibility

Designed as an OEM-style general-purpose jobber drill bit compatible with standard 3-jaw drill chucks accepting straight cylindrical shanks at 0.136 inches in diameter. Meets ANSI specification for wire-gauge jobber-length drill bits.

Installation Notes

A licensed machinist or qualified tradesperson should secure the shank fully in the chuck and verify concentricity before drilling. Secure the workpiece with a vise or clamp — never hand-hold metal stock when drilling. Apply a suitable cutting fluid when drilling steel to extend bit life and reduce heat buildup. Inspect the cutting edges and point for wear before each use; a dull or chipped point increases thrust load and can cause bit breakage.