Precision Twist Drill 6000011 Cobalt Drill Bit No. 51

Product Description

The PRECISION TWIST DRILL 6000011 is a cobalt jobber length drill bit sized to No. 51 wire gauge, equivalent to 0.0670 inches in diameter. Built from high-speed steel with a cobalt content and an oxide bronze finish, it is designed for general-purpose drilling in demanding materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The 135-degree split point reduces walking and improves bite on hard surfaces. With an overall length of 2 inches and a spiral flute design, this bit suits production drilling environments where consistent hole quality is required. Installation is handled by machinists, maintenance technicians, and fabricators working on light-gauge or precision-tolerance applications.

This drill bit is well suited for drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium across light industrial, maintenance, and fabrication settings. The 0.5 inch flute length supports a maximum drilling depth of 0.5 inches, making it appropriate for shallow through-holes and precision work in hard or abrasive workpiece materials. The straight cylindrical shank fits standard drill chucks without adapters, and the right-hand cut spiral flute clears chips efficiently during operation.

Key Features

• No. 51 wire size, 0.0670 inch diameter for precision hole tolerance
• 135-degree standard point angle with web-thinned tip reduces entry force on hard materials
• High-speed steel construction with oxide bronze coating for wear resistance
• Right-hand cut, regular spiral flute for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks directly
• Meets NAS 907 specification for dimensional and performance consistency

Compatibility

Designed as a general-purpose jobber length drill bit in Series R88CO-R89CO, compatible with standard drill chucks and collets accepting a 0.0670 inch straight cylindrical shank. Suitable for primary workpiece material codes P, M, K, N, and S per ISO classification.

Installation Notes

This bit is installed by machinists, tool and die technicians, or maintenance professionals using standard drill presses, CNC machines, or hand drills. Secure the shank fully in the chuck before operation and verify the chuck is tightened to prevent slippage. When drilling stainless steel, superalloys, or titanium, use appropriate cutting fluid to extend tool life and maintain hole quality. Coolant-through drilling is not supported by this bit.