Precision Twist Drill 5999140 Drill Bit Letter V Hss

Product Description

The PRECISION TWIST DRILL 5999140 is a jobber-length drill bit in Letter V size (0.3770 inches decimal equivalent), designed for general-purpose drilling in metal and hard materials. Built from high speed steel with a steam oxide coating, it features a 135-degree split-point tip and a tapered web with web thinning for easier penetration and reduced walking on entry. The spiral flute design and right-hand cut make it compatible with standard drill presses, CNC machining centers, and hand-held power drills. This bit is suited for machinists, maintenance technicians, and fabricators working across production and field environments.

The 5999140 is intended for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Its heavy-duty grade and NAS 907 specification make it appropriate for aerospace and precision manufacturing applications where dimensional accuracy and material hardness demand a reliable, consistent cutting tool. The 5-inch overall length and 3-5/8-inch flute length accommodate typical jobber-length drilling depths on standard workholding setups.

Key Features

• Letter V size with 0.3770-inch decimal equivalent for precise hole sizing
• 135-degree split-point angle reduces thrust and minimizes drill walking
• Steam oxide coating provides corrosion resistance and mild lubricity
• Web-thinned tapered web design improves chip clearance and cutting efficiency
• Two-flute spiral configuration with regular spiral type for standard metal drilling
• Meets ANSI standards and NAS 907 specification for heavy-duty applications

Compatibility

Designed for use in standard jobber-length drill bit applications across Series R10B, R15B, and R18B. Compatible with workpieces coded P, M, K, N, and S material categories, covering steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Straight-cylindrical shank fits standard three-jaw chucks without adapters.

Installation Notes

Installation and use should be performed by machinists or qualified technicians following standard machine shop safety practices. Secure the workpiece firmly before drilling and confirm the chuck is properly tightened on the straight shank. Power down and de-energize the machine before changing bits. Do not exceed the maximum drilling depth of 3-5/8 inches, and use appropriate cutting fluid for hard or heat-sensitive materials.