Precision Twist Drill 5996972 Jobber Drill Bit 18

Product Description

The PRECISION TWIST DRILL 5996972 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. It carries a wire gauge size of 18, which corresponds to a decimal diameter of 0.1695 inches. The bit is manufactured from high-speed steel with a bright, uncoated finish and features a 135-degree split point for improved centering and reduced walking on hard surfaces. Overall length is 3.25 inches with a flute length of 2.125 inches and a straight cylindrical shank. The parabolic spiral flute design promotes efficient chip evacuation, making this bit well suited to the drilling demands of trade professionals working in metal fabrication, mechanical contracting, and equipment service.

This drill bit is rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It belongs to the QC21P series and meets ANSI standards for jobber-length drill bits. It is appropriate for hand-held drill motors and drill press applications where a straight-shank, two-flute jobber bit is specified. The maximum drilling depth is 2.125 inches, and no coolant-through capability is provided, so external cooling or lubrication should be applied when drilling harder alloys or deep holes.

Key Features

• Wire size 18 with a decimal diameter of 0.1695 inches for precise bore sizing
• 135-degree point angle with web thinning reduces thrust and improves self-centering
• High-speed steel construction rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Parabolic spiral flute with tapered web configuration promotes chip clearance in deep holes
• Straight cylindrical shank fits standard drill chucks without an adapter
• Meets ANSI jobber-length standards; QC21P series, heavy-duty grade

Compatibility

Designed as an OEM-style replacement or standard-duty jobber drill bit for use in any drill press or portable drill motor accepting a straight cylindrical shank up to 0.1695 inches in diameter.

Installation Notes

Installation and use should be performed by a qualified machinist, maintenance technician, or trade professional familiar with metalworking operations. Ensure the drill chuck is fully tightened and the workpiece is securely clamped before beginning any drilling operation. Apply appropriate cutting fluid or lubricant when drilling stainless steel, cast iron, or titanium alloys to extend tool life and manage heat buildup. Always wear eye protection and follow applicable shop safety standards when operating drilling equipment.