Precision Twist Drill 5999230 Wire 80 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5999230 is a jobber-length drill bit in wire gauge size 80, with a decimal diameter of 0.0135 inches. Built from high speed steel with a bright uncoated finish, it features a standard 118-degree split point and a right-hand spiral flute for general-purpose drilling. The overall length is 0.75 inches, with a flute length of 0.125 inches and a straight-cylindrical shank. This bit is intended for machinists, tool-and-die technicians, and production drilling operations requiring precise small-diameter holes in a range of materials.

This drill bit is suited for drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It is commonly used in machine shop environments, precision fabrication, and production settings where consistent small-bore entry holes are required. The regular spiral type and tapered web configuration support controlled chip evacuation in tight-tolerance applications. The Series R18P designation places it within the PRECISION TWIST DRILL R10P-R15P-R18P family of general-purpose jobber bits.

Key Features

• Wire gauge size 80 with 0.0135-inch decimal diameter for precision small-bore drilling
• 118-degree standard point angle with web-thinned, tapered web for improved penetration
• High speed steel construction suitable for steel, stainless steel, cast iron, and non-ferrous metals
• Right-hand cut with regular spiral and 2 flutes for effective chip clearance
• Straight-cylindrical shank compatible with standard drill chucks and collets
• ANSI-standard specification for consistent dimensional accuracy

Compatibility

Part of the PRECISION TWIST DRILL Series R10P-R15P-R18P. Compatible with standard drill chucks and collets accepting a 0.0135-inch straight-cylindrical shank. Designed for general-purpose drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces.

Installation Notes

Installation and use of this bit should be performed by machinists or qualified trade professionals familiar with small-diameter drill tooling. Secure the straight shank firmly in a precision drill chuck or collet before operation to prevent runout or bit breakage. At wire gauge size 80, this bit is extremely small and fragile — use appropriate low-speed, high-feed-rate settings for the workpiece material to avoid snapping the bit. Inspect the cutting edges for wear regularly, as high speed steel bits in this size range have limited regrind capability.