Hertel H-81197080000 Spotting Drill 8mm 90 Deg Cobalt

Product Description

The HERTEL H-81197080000 is an 8 mm cobalt M-35 (HSS-E) spotting drill designed to create precise starter holes and accurately locate drill entry points on metal workpieces. The 90-degree point angle establishes a clean cone seat that guides follow-on drills and reduces walking on flat or curved surfaces. Built from cobalt M-35 high-speed steel, the tool handles harder steels and stainless alloys where standard HSS would wear prematurely. With a 5.5-inch overall length and a bright, uncoated finish, this is a general-purpose spotting solution for machine shops, maintenance facilities, and production drilling operations. Installation and use are handled by machinists and CNC operators.

This spotting drill is suited for general-purpose metal drilling applications on machining centers, drill presses, and CNC lathes. The straight cylindrical shank fits standard ER collets and drill chucks accepting 8 mm or 0.3150-inch diameter shanks. The 1-inch spiral flute length handles shallow spotting operations, and the web-thinned tip reduces thrust load at the cutting edge. Typical applications include locating holes for twist drills, countersink prep, and center-point marking on ferrous and non-ferrous metals.

Key Features

• Cobalt M-35 (HSS-E) construction for heat resistance and extended tool life in harder workpiece materials
• 90-degree point angle for accurate drill location and compatibility with standard countersink geometry
• Web-thinned tip reduces axial cutting force and improves centering accuracy
• Spiral flute design with right-hand cut for efficient chip evacuation
• Bright/uncoated finish suitable for use with a wide range of cutting fluids
• Straight cylindrical shank for direct mounting in collets or drill chucks

Compatibility

Designed as a general-purpose spotting drill for use in standard ER collet chucks and drill chucks accepting an 8 mm straight cylindrical shank on machining centers, CNC mills, and drill presses.

Installation Notes

This tool is installed and operated by machinists or CNC technicians. Ensure the machine spindle is fully stopped and the tool is properly seated and torqued in the collet or chuck before initiating a cut. Follow shop-standard feeds and speeds for cobalt tooling on the specific workpiece material. Use appropriate cutting fluid to manage heat, especially when drilling stainless or alloy steels.