Hertel 66692773 Jobber Drill Bit Letter Q 0.3320 in Hss

Product Description

The HERTEL 66692773 is a letter Q jobber-length drill bit designed for general-purpose holemaking in metal and other hard materials. Built from high speed steel with a TiAlN coating, it handles elevated cutting temperatures without breakdown, extending tool life in production or field drilling applications. The 135-degree split point reduces walking on contact and requires less feed force than a conventional 118-degree point. At 0.3320 inch decimal diameter, this bit produces clean, accurate holes and is well suited for machinists, maintenance mechanics, and MRO technicians working in shop or on-site environments.

This drill bit is rated for holemaking applications across a range of materials including carbon steel, alloy steel, cast iron, and stainless steel when used with appropriate feeds and speeds. The jobber-length format provides a standard reach suitable for the majority of through-hole and blind-hole drilling tasks on drill presses, lathes, or hand-held power drills. The TiAlN coating improves heat resistance at the cutting edge, making this bit particularly effective in higher-speed dry or near-dry cutting setups. Its straight-cylindrical shank fits standard three-jaw chucks without modification.

Key Features

• Letter Q size: 0.3320 inch decimal diameter for precise hole sizing
• 135-degree split point reduces thrust force and minimizes center walking
• TiAlN coating improves heat resistance and extends tool life in high-speed applications
• High speed steel construction rated for heavy-duty drilling service
• Web-thinned, tapered web configuration reduces cutting resistance
• Right-hand spiral flute with regular helix for consistent chip evacuation

Compatibility

Designed as a standard jobber-length drill bit with a straight-cylindrical shank sized at 0.3320 inch, compatible with any three-jaw drill chuck or collet system accepting that shank diameter. Meets NAS specification requirements for drill bit geometry and tolerances.

Installation Notes

This bit is installed by a machinist or maintenance mechanic using a standard drill chuck rated for the shank diameter. Before mounting, confirm the chuck jaws are clean and undamaged to prevent runout. Secure the shank fully and verify concentricity before beginning a cut. Follow appropriate feeds-and-speeds guidelines for the work material and always wear eye protection during drilling operations.