Precision Twist Drill 5998646 Jobber Drill Bit 5/64 in

Product Description

The PRECISION TWIST DRILL 5998646 is a jobber-length twist drill bit designed for general-purpose drilling in metal and hard materials. Built from high speed steel (HSS) with a steam oxide coating, this bit resists wear and reduces friction during operation. It measures 5/64 inch (0.0781 inch decimal) in diameter with a 2-inch overall length and a 1-inch flute length. The 118-degree standard point angle and web-thinned tip promote accurate starting and clean penetration. Licensed tradespeople and shop professionals who need reliable, consistent performance in production or field drilling applications will find this bit a dependable everyday tool.

This bit is suited for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The right-hand spiral flute design efficiently clears chips during through-hole and blind-hole drilling. With a straight-cylindrical shank at 5/64 inch diameter, it seats securely in standard drill chucks. It is appropriate for use in hand drills, drill presses, and CNC applications where a general-purpose jobber-length bit is specified. The R10 series designation places it within PRECISION TWIST DRILL's standard jobber line, conforming to ANSI specifications.

Key Features

• High speed steel construction for durability across a range of metal workpieces
• Steam oxide coating reduces friction and provides corrosion resistance
• 118-degree standard point angle with web-thinned tip for accurate starting
• Right-hand cut with regular spiral flutes for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters
• Conforms to ANSI standards for jobber-length drill bits

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard drill chucks accepting a 5/64-inch straight-cylindrical shank. Suitable for use across primary workpiece material categories P (steel), M (stainless steel), K (cast iron), N (non-ferrous metals), and S (superalloys and titanium) per ISO material classification.

Installation Notes

Install and secure the shank fully into the drill chuck before operation and verify chuck tightening to prevent bit slippage. Power down the drill and disconnect from the power source before changing bits. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to reduce heat buildup, as this bit does not support coolant-through delivery. Follow shop safety practices and applicable ANSI standards for drilling operations.