Osg 220-0785 Jobber Drill Bit No. 47 Solid Carbide

Product Description

The OSG 220-0785 is a solid carbide jobber length drill bit sized to wire gauge No. 47 (0.0785 inches, 1.99 mm) with a 118-degree web-thinned point. Solid carbide construction delivers the rigidity and edge retention needed when drilling steel, stainless steel, alloy steel, cast iron, aluminum, and aluminum alloys. The bright uncoated finish suits general-purpose drilling in both dry and minimal-lubrication applications. With a right-hand spiral flute and straight-cylindrical shank, this bit fits standard drill chucks used on CNC machines, drill presses, and hand-held power tools. Overall length is 1.75 inches with a flute length of 0.875 inches (22.20 mm).

Intended for general-purpose drilling operations including blind hole drilling, cross-hole drilling, and self-centering applications. The regular spiral flute geometry promotes chip evacuation in the short-length, small-diameter cuts common to this size range. Typical use cases include precision hole drilling in machined parts, fabricated metal components, and assembly operations requiring consistent tolerance control. The tapered web configuration and web-thinned point reduce thrust requirements on entry, which is particularly useful when working with harder ferrous materials. This bit is suited for professional machinists and trade technicians working in fabrication, HVAC equipment assembly, and industrial maintenance.

Key Features

• Solid carbide construction for rigidity and extended tool life in ferrous and non-ferrous materials
• 118-degree web-thinned point with tapered web for reduced entry thrust and accurate self-centering
• Right-hand cut, regular spiral flute promotes efficient chip evacuation
• Bright uncoated finish compatible with dry cutting and standard cutting fluid applications
• Straight-cylindrical shank fits standard drill chucks without adapters
• Diameter tolerance of plus 0 to minus 0.013 mm for consistent, repeatable hole sizing

Compatibility

Designed as an OEM-style replacement and general-purpose solid carbide drill bit for use in standard drill chucks accepting straight-cylindrical shanks in the No. 47 wire gauge size class. Compatible primary workpiece materials include steel, alloy steel, stainless steel, cast iron, aluminum, aluminum alloy, and aluminum silicate per OSG Series 220D specifications.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with small-diameter carbide tooling. Secure the straight-cylindrical shank firmly in the drill chuck before operation to prevent runout, which can fracture solid carbide bits at this diameter. Verify spindle speed and feed rate settings are appropriate for carbide tooling in the target material before beginning a cut. Coolant through is not supported on this bit; apply cutting fluid externally when required by the workpiece material.