Precision Twist Drill 5997101 Jobber Drill Bit 11/16 in

Product Description

The PRECISION TWIST DRILL 5997101 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. Built from high speed steel with a bright, uncoated finish, it features a 135-degree split-point tip that reduces walking and improves bite on curved or hardened surfaces. The parabolic flute geometry with web thinning promotes efficient chip evacuation and lowers cutting resistance. At 7.625 inches overall length with a 5.625-inch flute, this bit suits standard drill press and handheld power drill applications. It is typically installed by machinists, maintenance technicians, pipefitters, and HVAC fabricators working in metal fabrication and field drilling tasks.

This drill bit is rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The straight cylindrical shank at 0.6875 inches diameter fits standard three-jaw chucks without adapters. The Series QC21P designation places it in a heavy-duty jobber category, making it appropriate for production drilling environments as well as single-use field applications. The 8xD flute-to-diameter ratio supports drilling depth up to 5.625 inches in a single pass under proper chip-clearing conditions.

Key Features

• 135-degree split point reduces tip walking and improves penetration on hard or curved surfaces
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Parabolic spiral flute with web thinning for efficient chip evacuation and reduced heat buildup
• Straight cylindrical shank at 11/16 inches fits standard drill chucks without adapters
• 7.625-inch overall length with 5.625-inch maximum drilling depth suits most jobber-length applications
• Meets ANSI standards; heavy-duty grade rated for general-purpose production and field use

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw drill chuck accepting an 11/16-inch straight cylindrical shank, including drill presses and handheld power drills used in metal fabrication, HVAC, plumbing, and electrical trade work.

Installation Notes

Secure the shank fully in a properly sized drill chuck and confirm chuck key is removed before operation. Apply appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to manage heat and extend tool life. Reduce feed pressure as the tip breaks through to prevent bit grab or workpiece movement. Follow applicable ANSI and shop-safety standards for eye protection and workpiece clamping during drilling operations.