Precision Twist Drill 5996571 Letter M Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5996571 is a jobber-length drill bit sized to Letter M (0.2950 inches) designed for general-purpose hole-making in a wide range of materials. Built from high-speed steel with a bright uncoated finish, it features a 135-degree split point for reduced walking and faster penetration on hard surfaces. The parabolic flute geometry with web thinning improves chip evacuation and reduces cutting resistance. With an overall length of 4.375 inches and a flute length of 3.0625 inches, this bit fits standard drill chucks via its straight cylindrical shank. It is suited for use by machinists, maintenance technicians, and metalworking trades.

This drill bit is rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium, covering ISO material codes P, M, K, N, and S. It is a solid choice for production drilling, maintenance repair, and fabrication environments where a reliable general-purpose HSS bit is needed. The QC21P series designation and ANSI compliance indicate this bit meets recognized dimensional standards. Typical applications include through-hole and blind-hole drilling in both manual and CNC-compatible drill press setups where coolant-through tooling is not required.

Key Features

• Letter M size at 0.2950 inches decimal equivalent for precise hole sizing
• 135-degree split point reduces bit walking on entry and cuts faster through hard materials
• Parabolic flute with web thinning promotes efficient chip removal and lower thrust force
• High-speed steel construction supports use across a broad range of metal workpiece materials
• Straight cylindrical shank fits standard three-jaw chucks without adapters
• ANSI-compliant dimensions per QC21P series specification

Compatibility

Designed as a general-purpose OEM-style replacement or stock drill bit for use in any standard drill press, hand drill, or CNC drilling application accepting a 0.2950-inch straight shank tool within the Letter M size range.

Installation Notes

Licensed machinists and metalworking technicians typically install and replace jobber-length drill bits. Secure the shank fully in the chuck and confirm runout before drilling. Power down and de-energize the drill press or machine before changing tooling. Inspect the cutting edges for wear before each use, and do not force a dull bit through hardened material, as this can cause bit breakage or workpiece damage.