Micro 100 SPD-312-082 Spotting Drill 5/16 in 82 Deg Carbide

Product Description

The MICRO 100 SPD-312-082 is a solid carbide spotting drill designed to create precise starter holes and accurately locate center points before drilling operations. Built to the SPD series standard, it features an 82-degree point angle that conforms to standard drill point geometry, allowing the spot to serve as a self-centering guide for follow-on drills. The cutting diameter and shank diameter are both 0.3125 inches (5/16 inches), with an overall length of 2.5 inches. The bright, uncoated finish makes it straightforward to inspect for wear. This tool is installed by machinists and CNC operators in job shop and production environments.

The SPD-312-082 is suited for general-purpose spotting applications across a wide range of workpiece materials where center accuracy and drill walk prevention are priorities. The 2-flute spiral flute design with a 0.75 inch flute length provides adequate chip clearance for shallow spotting passes. The straight-cylindrical shank seats cleanly in standard drill chucks and collet holders. This tool is appropriate for use in CNC machining centers, manual drill presses, and mill-drill setups wherever consistent hole location is required before a full-diameter drill is run.

Key Features

• 82-degree point angle matches standard jobber drill geometry for accurate spot-to-drill transition
• Solid carbide construction provides rigidity and wear resistance compared to HSS alternatives
• 0.3125 inch cutting diameter with matching 0.3125 inch straight-cylindrical shank for direct collet or chuck mounting
• 2-flute spiral flute design with 0.75 inch flute length for chip clearance on shallow spotting passes
• Bright, uncoated finish allows easy visual inspection of cutting edge condition
• Single-ended, right-hand cut configuration for standard spindle rotation

Compatibility

Designed as a general-purpose spotting drill for use in standard drill chucks and collet systems that accept a 5/16 inch straight-cylindrical shank, suitable for CNC and manual machining setups requiring an 82-degree spot angle.

Installation Notes

A licensed machinist or qualified CNC operator should install and run this tool following shop safety procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool from the holder. Verify collet or chuck runout is within acceptable tolerance before running, as excessive runout will degrade spot location accuracy. Feed and speed parameters should be selected based on workpiece material and machine rigidity; consult standard carbide tooling guidelines for the material being machined.