Hertel H-81197063500 Spotting Drill 1/4 in 90 Deg Cobalt

Product Description

The HERTEL H-81197063500 is a 1/4 inch diameter spotting drill designed to create accurate starter points for follow-on drilling operations. Built from Cobalt M-35 (HSS-E), this tool offers improved heat and wear resistance compared to standard high-speed steel, making it suitable for harder workpiece materials. The 90-degree point angle produces a clean, centered seat that guides twist drills and reduces walking on flat or curved surfaces. At 5.5 inches overall length with a 0.87 inch flute length, it fits standard drill chucks and CNC toolholders. This is a single-ended tool with a right-hand cut and a bright, uncoated finish. Machinists, tool-and-die workers, and CNC operators are the primary users.

This spotting drill is suited for general-purpose machining environments including job shops, production floors, and maintenance operations. The 1/4 inch straight cylindrical shank accepts standard collet chucks and drill chucks found on CNC machining centers, knee mills, and drill presses. The 90-degree included angle matches the standard countersink geometry used with most twist drill points, providing positive drill engagement at the start of the hole. It is appropriate for use in steel, stainless steel, aluminum, and similar machinable materials where precise hole location is required before full-depth drilling.

Key Features

• Cobalt M-35 (HSS-E) construction for improved hardness and heat resistance over standard HSS
• 90-degree point angle for accurate drill-point seating and compatibility with standard twist drill geometry
• Web-thinned design reduces thrust force at entry and improves centering performance
• Spiral flute, 2-flute configuration promotes chip clearance during spotting
• Bright/uncoated finish suitable for use with cutting fluids across a wide range of materials
• Straight cylindrical shank fits standard collets and drill chucks without adapters

Compatibility

Designed as a general-purpose spotting drill for use in standard drill chucks and collet systems accepting a 1/4 inch straight cylindrical shank. No specific machine model compatibility was stated in the product data.

Installation Notes

Installation is performed by licensed machinists or qualified CNC operators. Ensure the machine spindle is fully stopped and locked out before securing the tool in the chuck or collet holder. Confirm runout is within acceptable tolerance before beginning the spotting operation, as excessive runout will defeat the purpose of pre-spotting. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life.