Precision Twist Drill 5997128 15/64 in Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5997128 is a jobber-length twist drill bit designed for general-purpose drilling in metal and non-ferrous materials. It measures 15/64 inch (0.2344 inch decimal) in diameter with an overall length of 3-7/8 inches and a flute length of 2-5/8 inches. The 135-degree split point reduces walking on entry and requires less thrust than a standard 118-degree point. Constructed from high speed steel with a bright uncoated finish, this bit suits production drilling and maintenance work across fabrication, HVAC, plumbing, and electrical trades where standard HSS performance is required.

This bit is built for drilling steel, aluminum, and other non-ferrous materials in general workshop and field applications. The straight cylindrical shank fits standard three-jaw drill chucks on corded and cordless drills as well as drill presses. With an 11xD flute-to-diameter ratio, it clears chips efficiently in through-hole and moderate-depth drilling tasks. The QC21P series is a general-purpose line intended for everyday production and maintenance drilling where coated or specialty bits are not required.

Key Features

• 135-degree web-thinned split point reduces drill walking and lowers required feed pressure
• High speed steel construction provides durability across steel and non-ferrous workpieces
• Bright uncoated finish suitable for general-purpose use without added coating cost
• Regular spiral flute geometry promotes consistent chip evacuation during drilling
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets ANSI standards for jobber-length drill bit geometry and tolerances

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw drill chuck accepting a 15/64 inch (0.2344 inch) straight shank. Suitable for steel, aluminum, and non-ferrous workpiece materials per ANSI material application codes P, M, K, N, and S.

Installation Notes

Install the shank fully into the drill chuck and tighten securely before use. Ensure the workpiece is clamped or secured to prevent movement during drilling. Apply appropriate cutting fluid when drilling steel to extend bit life and improve hole quality. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.