Precision Twist Drill 5997044 Jobber Drill Bit 5.50mm Hss

Product Description

The PRECISION TWIST DRILL 5997044 is a 5.50 mm diameter jobber-length drill bit designed for general-purpose drilling in a wide range of materials. Built from high speed steel (HSS) with a bright uncoated finish, it features a 135-degree split point that reduces walking on entry and requires less thrust than a standard 118-degree point. The straight cylindrical shank measures 5.5 mm in diameter and seats securely in standard drill chucks. With an overall length of 3.6563 inches and a flute length of 2.25 inches, this bit suits typical jobber-length drilling tasks encountered in metal fabrication, maintenance, and mechanical service work.

This drill bit is intended for use on steel, aluminum, and non-ferrous materials, making it appropriate for a broad range of trade applications including HVAC equipment assembly, plumbing rough-in, electrical panel work, and general mechanical fabrication. It conforms to DIN 338, which defines the standard for jobber-length twist drills, and is suited for both hand-held and drill-press setups. The QC21PM series is a general-purpose line appropriate for production and service environments where consistent hole quality is needed without specialty coatings.

Key Features

• 135-degree split point reduces bit walking and lowers entry thrust on steel and non-ferrous materials
• High speed steel construction provides adequate hardness and toughness for general-purpose drilling
• Bright uncoated finish allows easy visual inspection for wear and re-sharpening
• Regular spiral flute with tapered web and web-thinned geometry improves chip evacuation
• Straight cylindrical shank fits standard 3-jaw drill chucks without adapters
• Conforms to DIN 338 standard for consistent dimensional accuracy

Compatibility

Designed as a general-purpose jobber drill bit compatible with any standard drill chuck accepting a 5.5 mm straight shank, including hand drills, drill presses, and CNC drilling setups rated for HSS tooling.

Installation Notes

This bit is installed and removed by a licensed mechanic or qualified tradesperson using a standard keyed or keyless drill chuck. Always ensure the workpiece is securely clamped before drilling to prevent rotation or movement during operation. Use appropriate cutting fluid when drilling steel to extend tool life and improve hole finish. Inspect the cutting edges before each use and replace or resharpen the bit if chipping or dulling is evident.