Precision Twist Drill 5998712 Jobber Drill Bit 25/64 in

Product Description

The PRECISION TWIST DRILL 5998712 is a jobber-length twist drill bit designed for general-purpose drilling in a wide range of materials. Built from high speed steel with a steam oxide coating, it measures 25/64 inch (0.3906 inch) in diameter with a 118-degree standard point angle. The overall length is 5.125 inches, with a 3.75-inch spiral flute length and a right-hand cutting direction. The web-thinned, tapered web design reduces cutting resistance and helps center the bit at the start of a hole. This bit is sold individually and suited for use in hand drills, drill presses, and CNC drilling operations by machinists and trade professionals.

This bit is rated for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It carries a straight-cylindrical shank at 0.3906 inch diameter and 1.375 inches in shank length, compatible with standard drill chucks. The Series R10 designation indicates a flute-to-diameter ratio of 10xD, placing it in the standard jobber-length class. It is built to ANSI standards and suited for both shop and field drilling applications where a reliable general-purpose bit is needed.

Key Features

• 25/64 inch (0.3906 inch) diameter with 118-degree standard point angle
• High speed steel construction with steam oxide coating for corrosion resistance
• Right-hand cut, regular spiral flute, 3.75 inches of flute length
• Web-thinned tapered web for reduced thrust and easier starting
• Straight-cylindrical shank fits standard drill chucks without modification
• Built to ANSI standards, Series R10, general-purpose grade

Compatibility

Designed as a general-purpose jobber-length drill bit for use with standard drill chucks in drill presses, hand drills, and CNC equipment. Primary workpiece material codes P, M, K, N, and S indicate suitability for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium.

Installation Notes

This bit is installed by machinists, maintenance technicians, and trade professionals operating drill presses or hand-held drilling equipment. Secure the straight-cylindrical shank firmly in a properly sized chuck before operation. Always power down and de-energize equipment before changing bits. Follow applicable shop safety standards and use appropriate cutting fluid or coolant when drilling hard materials, noting that this bit does not support coolant-through operation.