Precision Twist Drill 5997175 No. 44 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5997175 is a wire-gauge jobber-length drill bit in No. 44 size, measuring 0.086 inches in diameter. It is manufactured from high-speed steel with a bright, uncoated finish and ground to a 135-degree split-point angle for self-centering starts without a center punch. The two-flute, right-hand spiral design clears chips efficiently during through-hole and blind-hole operations. At 2.125 inches overall length with a 1.125-inch flute length, it is sized for compact drilling applications in handheld drills, drill presses, and CNC equipment. Machinists, maintenance technicians, and metal fabricators install this bit for general-purpose work in steel, aluminum, and non-ferrous materials.

This jobber drill bit is suited for production drilling and general maintenance drilling in light industrial and shop environments. It performs in residential and commercial maintenance contexts wherever a No. 44 wire-gauge hole is required. The QC21P series is built to ANSI standards and targets everyday drilling in steel and aluminum workpieces. It is a single-piece package intended for use in standard straight-shank chucks. The web-thinned, tapered-web construction reduces thrust requirements and improves centering on hard materials.

Key Features

• No. 44 wire-gauge diameter of 0.086 inches for precise small-diameter hole making
• 135-degree split point for self-centering starts on steel and aluminum without a pilot hole
• High-speed steel construction provides heat resistance for general-purpose metal drilling
• Bright, uncoated finish is compatible with cutting fluid application for extended tool life
• Web-thinned, tapered web reduces axial thrust and improves penetration on harder workpieces
• Right-hand, regular-spiral flute geometry promotes consistent chip evacuation in through-hole drilling

Compatibility

Designed as a general-purpose OEM-style replacement or new-install jobber drill bit for use in straight-shank drill chucks accepting a 0.1875-inch shank diameter. Suitable for steel, aluminum, and non-ferrous workpiece materials per ANSI specification QC21P.

Installation Notes

This bit is installed by machinists and maintenance technicians in standard keyless or keyed drill chucks on handheld drills, drill presses, and CNC drilling equipment. Secure the straight shank fully in the chuck before beginning any operation and confirm the spindle is at a full stop before bit changes. Apply a suitable cutting fluid when drilling steel to manage heat buildup and extend bit life. Follow ANSI safety guidelines and wear appropriate eye protection during all drilling operations.