Onsrud 70-506 Jobber Length Drill Bit 5/32 Inch Hss

Product Description

The ONSRUD 70-506 is a jobber length drill bit designed for general-purpose drilling in plastic and similar materials. Built from high speed steel with a bright uncoated finish, it measures 5/32 inch (0.1560 inch decimal) in diameter with an overall length of 3.125 inches. The standard 60-degree point angle and web-thinned tip support accurate entry and reduced thrust. Two spiral flutes in a regular helix clear chips efficiently during through-hole and blind-hole work. The straight cylindrical shank seats securely in standard drill chucks. This bit is suitable for use by machinists, maintenance technicians, and trade professionals requiring a compact, reliable twist drill for light-duty applications.

The ONSRUD 70-506 is sized for work in plastics as its primary workpiece material, making it a practical choice for electrical, HVAC, and plumbing trades when drilling through panels, enclosures, or plastic fittings. The 1-15/16 inch flute length supports a maximum drilling depth of 1.9375 inches, which covers most panel and sheet applications. The 12xD flute-to-diameter ratio keeps the bit compact and rigid. It is sold individually and fits standard 3-jaw drill chucks without adapters.

Key Features

• 5/32 inch (0.1560 inch) diameter with a straight cylindrical shank of matching diameter
• 60-degree standard point angle with web-thinned tip for reduced entry force
• High speed steel construction for durability across repeated use cycles
• Two regular spiral flutes for efficient chip evacuation during drilling
• Right hand cut, compatible with standard forward-rotating drill drivers and drill presses
• Bright uncoated finish - no coating buildup to affect hole tolerance in close-tolerance work

Compatibility

Designed as a general-purpose jobber length drill bit in the ONSRUD 70-500 series, sized for use with standard drill chucks accepting 5/32 inch straight cylindrical shanks. Primary workpiece material is plastic; suitable for light-duty general-purpose drilling applications.

Installation Notes

Install the shank fully into the drill chuck and tighten securely before operation. Ensure the workpiece is clamped or otherwise secured to prevent movement during drilling. When drilling plastic, use moderate speed and consistent feed pressure to avoid melting or cracking the material. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.