Guhring 9005590127000 Spotting Drill 90 Degree Hss

Product Description

The GUHRING 9005590127000 is a 90-degree high speed steel spotting drill designed to create precise center-start locations for follow-on drilling operations. Built to Series 559 standards, it features a 0.5000-inch cutting diameter with a matching 0.5000-inch straight cylindrical shank, and a bright uncoated finish suited for general-purpose shop use. The overall length measures 6.2656 inches with a 1.1800-inch flute length. The two-spiral-flute, single-ended design supports right-hand cutting and delivers consistent spot geometry across ferrous and non-ferrous workpiece materials. Licensed machinists, tool-and-die techs, and production drilling setups are the primary users.

This spotting drill is intended for general-purpose spotting applications across metalworking environments including job shops, maintenance facilities, and production floors. It is used to establish accurate drill starts, reduce walking on flat or angled surfaces, and improve hole-location accuracy before full-depth drilling. The 90-degree point angle aligns with standard countersink and center-drill conventions, making it a practical fit for conventional machining centers, drill presses, and CNC setups running through coolant or dry.

Key Features

• 90-degree drill point angle for accurate spot starts and countersink compatibility
• 0.5000-inch cutting diameter with matching straight cylindrical shank for direct collet or chuck mounting
• High speed steel construction for general-purpose durability across common workpiece materials
• Bright uncoated finish — suitable for re-sharpening and inspection of wear
• Two spiral flutes with right-hand cut for standard spindle rotation
• Single-ended design with 1.1800-inch flute length for shallow, precise spot geometry

Compatibility

Designed as an OEM-style general-purpose spotting drill for use in standard 1/2-inch collets, drill chucks, or tool holders on conventional and CNC machining equipment.

Installation Notes

Spotting drills are installed by machinists and tool-and-die technicians using standard collet or drill chuck setups. Ensure the spindle is fully stopped and the machine is in a safe lockout state before changing tooling. Verify runout with a dial indicator after seating the shank to confirm concentricity before cutting. Follow the machine manufacturer and OSHA applicable guidelines for RPM and feed selection based on workpiece material.