Precision Twist Drill 5999217 Wire 77 Hss Drill Bit

Product Description

The PRECISION TWIST DRILL 5999217 is a jobber-length drill bit in wire gauge size 77, with a decimal diameter of 0.0180 inches. Made from high speed steel with a bright uncoated finish, it features a 118-degree standard point angle and a regular spiral flute with right-hand cutting action. The overall length is 0.875 inches (7/8 inches), with a flute length of 0.1875 inches (3/16 inches). The shank diameter matches the drill diameter at 0.0180 inches and runs a straight-cylindrical profile. This bit is a general-purpose drilling tool suited for use by machinists, tool and die workers, and maintenance technicians working with small-diameter hole applications.

This drill bit is rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. At 10xD flute-to-diameter ratio, it handles drilling depths up to 0.1875 inches (3/16 inches). The web-thinned, tapered web construction reduces thrust and improves chip clearance. It is appropriate for general-purpose production and maintenance drilling where tight hole tolerances in small diameters are required. The Series R18P designation places it within the R10P-R15P-R18P family from Precision Twist Drill.

Key Features

• Wire gauge size 77 with 0.0180 inch decimal diameter for precision small-hole drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction supports drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Regular spiral, right-hand cut with 2 flutes for consistent chip evacuation
• Bright uncoated finish — no additional coating buildup that could affect hole diameter tolerances
• Meets ANSI standards; straight-cylindrical shank for use in standard drill chucks and collets

Compatibility

Designed as an OEM-style general-purpose jobber-length drill bit for use in standard straight-shank drill chucks and collets accepting 0.0180 inch shank diameters. Part of the Precision Twist Drill R10P-R15P-R18P series.

Installation Notes

Installation and use of small-diameter drill bits should be performed by machinists or trained technicians familiar with proper chuck and collet setups. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits, as small wire-gauge bits are susceptible to deflection and breakage under side loads. Power down and lock out the drilling machine before changing bits. Do not exceed the rated maximum drilling depth of 3/16 inches per pass without withdrawing the bit to clear chips.