Precision Twist Drill 5999145 Jobber Drill Bit No 63 Hss

Product Description

The PRECISION TWIST DRILL 5999145 is a jobber-length drill bit in wire gauge size No. 63, measuring 0.0370 inches in diameter. Built from high speed steel with a bright uncoated finish, this bit features a standard 118-degree split point, a two-flute regular spiral design, and a web-thinned tapered web for reduced thrust during entry. The straight-cylindrical shank seats directly in standard drill chucks without adapters. At 1.5 inches overall length with a 5/8-inch flute length, this bit is sized for precision small-hole work in tight or shallow applications. It is part of the R18P series and conforms to ANSI standards.

This bit is designed for general-purpose drilling in a wide range of materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It is well suited for light-duty production drilling, maintenance and repair, and prototype work where accurate small-diameter holes are required. The right-hand cut and spiral flute geometry support clean chip evacuation in both handheld and drill-press setups. Coolant-through capability is not available on this bit.

Key Features

• Wire gauge No. 63 sizing at 0.0370 inches decimal diameter for precise small-hole applications
• High speed steel construction for durability across steel, cast iron, and non-ferrous materials
• 118-degree standard point angle with web-thinned tapered web reduces entry thrust
• Bright uncoated finish — suitable for general-purpose use without heat-treatment concerns
• 5/8-inch maximum drilling depth supports shallow-bore work in thin stock
• ANSI-compliant jobber-length geometry for consistent fitment in standard chucks

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard drill chucks accepting a 0.0370-inch straight-cylindrical shank. Suitable for use in hand drills, drill presses, and CNC drilling setups configured for small wire-gauge tooling.

Installation Notes

Installation and use of this bit should be performed by machinists, tool and die technicians, or qualified maintenance personnel familiar with small-diameter drill bit handling. Secure the straight-cylindrical shank fully in a properly sized drill chuck before operation to prevent runout or bit breakage. Small-diameter bits are susceptible to breakage under side loading or excessive feed pressure — use consistent, controlled feed rates. Follow applicable shop safety practices and wear appropriate eye protection during all drilling operations.