Hertel 66694472 No 48 Hss Tin Jobber Drill Bit

Product Description

The HERTEL 66694472 is a No. 48 wire-size jobber-length drill bit designed for precise holemaking in metal and general-purpose materials. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction compared to uncoated HSS. The 135-degree split point starts on contact without a center punch and reduces walking on flat surfaces. At 2 inches overall length with a 1-inch flute, this is a compact, heavy-duty drill suited for production and maintenance drilling operations. Licensed tradespeople, machinists, and industrial maintenance techs are the primary users.

This bit is sized at 0.0760 inches (No. 48 wire gauge) and fits standard straight-shank drill chucks. The right-hand spiral flute with regular helix evacuates chips efficiently in through-hole and blind-hole applications. The web-thinned, tapered web design reduces thrust force required at the drill point. It is well-suited for light-gauge metal fabrication, electrical enclosure work, HVAC sheet metal, and precision maintenance drilling where small-diameter accuracy is critical.

Key Features

• No. 48 wire size - 0.0760 inch decimal diameter for tight-tolerance hole applications
• 135-degree split point with web thinning reduces walking and lowers required thrust
• TiN coating extends tool life and reduces heat buildup during drilling
• High speed steel construction rated for heavy-duty use per NAS specification
• Right-hand, regular-spiral, 2-flute design promotes clean chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a jobber-series replacement drill bit for any standard straight-shank drill chuck accepting a 0.0760-inch shank, consistent with No. 48 wire-gauge tooling in NAS-specification applications.

Installation Notes

Install in a keyed or keyless chuck and verify the shank is fully seated and centered before operation. Secure the workpiece before drilling to prevent rotation or movement. Use cutting fluid or light oil when drilling ferrous metals to extend bit life and maintain hole quality. Discard or resharpen bits showing chipped edges or discoloration from overheating rather than continuing use.