Hertel 84581172 No 43 Hss Jobber Drill Bit 135 Deg

Product Description

The HERTEL 84581172 is a No. 43 wire-size jobber-length drill bit designed for general-purpose holemaking in metal, plastic, and composite materials. Ground from high speed steel with an oxide coating for added lubricity and corrosion resistance, it features a 135-degree split point that self-centers on contact and reduces the thrust required to start a hole. The 2-flute spiral flute design clears chips efficiently through the 1.25-inch flute length. With an overall length of 2.25 inches and a straight-cylindrical shank diameter of 0.0890 inches, this bit fits standard drill chucks used by machinists, maintenance technicians, and metalworkers.

This bit is suited for light-duty production drilling and maintenance applications where a No. 43 wire-gauge hole is required. Common uses include tap drilling, pilot holes for small fasteners, and instrument or panel drilling in metal fabrication and HVAC sheet metal work. The NAS specification designation and heavy-duty grade rating make it appropriate for shop environments that require consistent, repeatable hole geometry. It is sold individually but must be ordered in multiples of 12.

Key Features

• No. 43 wire size, 0.0890 inches decimal diameter — precise sizing for tap and clearance hole work
• 135-degree split point self-centers and reduces walking on smooth or curved surfaces
• High speed steel construction with oxide coating for wear resistance and reduced friction
• Web-thinned, tapered web configuration lowers cutting resistance and improves chip evacuation
• Regular spiral, right-hand cutting with 2 flutes — compatible with standard drill chucks
• NAS specification designation, heavy-duty grade — meets shop and production standards

Compatibility

Designed as a jobber-series replacement or stock drill bit for any application requiring a No. 43 wire-size hole; fits standard straight-shank drill chucks and collets accepting a 0.0890-inch shank diameter.

Installation Notes

Install into a drill press, hand drill, or CNC spindle with a chuck rated for the 0.0890-inch straight shank. Secure the shank fully in the chuck and verify concentricity before drilling. Use appropriate cutting fluid when drilling ferrous metals to extend tool life. Inspect the cutting edges and split point for wear or chipping before each use and replace when edge geometry is no longer sharp.