Hertel 84578681 Jobber Drill Bit Letter Q 0.3320 in Hss Tin

Product Description

The HERTEL 84578681 is a jobber-length drill bit in Letter Q size, measuring 0.3320 inches in diameter. Built from high speed steel with a titanium nitride (TiN) coating, it delivers improved surface hardness and extended tool life compared to uncoated HSS bits. The standard 118-degree point angle suits general-purpose drilling in a wide range of materials including mild steel, aluminum, plastics, and wood composites. With an overall length of 4.75 inches and a flute length of 3.4375 inches, it fits standard drill chucks and drill presses used in machining, fabrication, and maintenance applications. A web-thinned, tapered web design reduces thrust and improves chip ejection at entry.

This bit is suited for general-purpose production drilling and maintenance repair operations in light manufacturing, metal fabrication shops, and job-site work. The straight cylindrical shank accepts standard three-jaw chucks on handheld drills, drill presses, and CNC machining centers. The right-hand spiral flute design with regular spiral type evacuates chips efficiently in through-hole and blind-hole applications. It is sized within the 0.3000 to 0.3500 inch decimal inch range and is sold individually.

Key Features

• Letter Q size at 0.3320 inches diameter for precise hole sizing
• High speed steel construction with TiN coating for extended wear resistance
• 118-degree standard point angle for general-purpose material compatibility
• Web-thinned tapered web reduces cutting thrust and improves chip flow
• 2-flute right-hand spiral design for efficient chip evacuation
• Straight cylindrical shank fits standard three-jaw chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard three-jaw drill chucks, drill presses, and CNC machining centers accepting straight cylindrical shank tooling in the 0.3320 inch diameter range.

Installation Notes

This bit is installed and used by machinists, fabricators, and maintenance technicians. Secure the straight shank firmly in a calibrated chuck before operation and verify runout on precision applications. Use appropriate cutting fluid or coolant when drilling ferrous metals to preserve coating life, noting that this bit does not support internal coolant through. Follow applicable shop safety standards and machine guarding requirements during use.