Precision Twist Drill 5999128 Wire 59 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5999128 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. It carries a wire gauge size of 59, equivalent to 0.0410 inches in decimal, and features a 118-degree standard point angle with a web-thinned tip for improved penetration and reduced thrust. The bright, uncoated high speed steel construction is suited for lower-speed drilling operations where heat buildup is controlled. With an overall length of 1.625 inches and a regular spiral flute, this bit fits standard drill chucks and benchtop drilling setups used daily in fabrication and maintenance work.

This drill bit is intended for right-hand cutting operations on a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It is commonly used in production drilling, maintenance repair, and light fabrication environments. The straight-cylindrical shank seats securely in standard keyless or keyed chucks without modification. The Series R18P designation places it within a recognized family of precision jobber-length bits conforming to ANSI standards.

Key Features

• Wire size 59 (0.0410 inches) with matching shank diameter for concentric, chatter-free drilling
• 118-degree standard point angle with web-thinned tip reduces walking and entry thrust
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Bright uncoated finish suited for lower-speed, high-coolant or dry drilling applications
• Regular two-flute spiral design with 11/16-inch flute length for efficient chip evacuation in shallow holes
• Conforms to ANSI standards for consistent dimensional accuracy across the series

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard keyless and keyed drill chucks accepting a 0.0410-inch straight-cylindrical shank. Suitable across ANSI material groups P, M, K, N, and S, covering steel, stainless steel, cast iron, non-ferrous metal, and superalloys.

Installation Notes

Installation and use of this drill bit should be performed by a qualified machinist or maintenance technician familiar with drill press, hand drill, or CNC setup procedures. Power down and de-energize the drilling machine before inserting or removing the bit from the chuck. Ensure the chuck is fully tightened and the workpiece is securely clamped before starting the spindle. Do not exceed the recommended maximum drilling depth of 11/16 inches per pass without retracting to clear chips.