Precision Twist Drill 5998027 Jobber Drill Bit 5/64

Product Description

The PRECISION TWIST DRILL 5998027 is a 5/64 inch diameter jobber length drill bit 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 that reduces walking and improves bite on curved or hard surfaces. The two-flute spiral design with a tapered web and web-thinned tip promotes efficient chip evacuation. With a 2 inch overall length and a straight cylindrical shank, this bit fits standard drill chucks and is sized for use in both hand-held and bench-mounted drilling equipment. It is a heavy-duty grade bit suited for production and maintenance drilling work.

This bit is rated for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Its 5/64 inch diameter and 1 inch flute length make it well suited for small-diameter through-holes and precise location drilling in fabrication, maintenance, and repair applications. The R10B series designation places it within a standard jobber length family commonly used in machine shops, tool rooms, and field service work. The NAS 907 and ANSI standards compliance confirms dimensional and performance consistency across production runs.

Key Features

• 135-degree split point reduces drill walking and improves penetration on hard surfaces
• Steam oxide coating provides mild lubricity and corrosion resistance during storage and use
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Web-thinned tapered web improves chip flow and reduces thrust requirements
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets NAS 907 and ANSI standards for dimensional accuracy

Compatibility

Designed as an OEM-style jobber length drill bit for use in standard 3-jaw drill chucks accepting a 5/64 inch straight shank. Compatible workpiece materials per series specification include steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium (material codes P, M, K, N, S).

Installation Notes

Install in a properly sized drill chuck and tighten securely before use. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to extend bit life. Inspect the cutting edges before each use and replace if chipping or wear is visible.