Keo 956-000-159 Spotting Drill 4mm 90 Degree Cobalt M-42

Product Description

The KEO 956-000-159 is a spotting drill designed to create accurate, centered starting points for standard twist drills and other cutting tools. Built from Cobalt M-42 high-speed steel, this single-ended drill delivers the hardness and heat resistance needed for production and general-purpose machining environments. The 90-degree point angle produces clean, consistent seat geometry that keeps follow-up drills on location without walking. The bright, uncoated finish suits a wide range of workpiece materials. With a 4 mm cutting diameter and 52 mm overall length, this tool fits compact toolholding setups on CNC machining centers, manual knee mills, and drill presses alike. It is installed and used by machinists, toolroom technicians, and manufacturing maintenance personnel.

This spotting drill is suited to general-purpose spotting operations in steel, aluminum, cast iron, plastics, and similar machinable materials. The 4 mm diameter and 12 mm flute length make it appropriate for small-feature work where precise hole location is critical. The straight cylindrical shank accepts standard collet chucks and drill chucks without modification. Two spiral flutes aid chip clearance during the brief engagement typical of spotting operations.

Key Features

• 90-degree point angle for accurate drill seat geometry and reduced walking
• Cobalt M-42 construction provides elevated heat resistance over standard HSS
• Bright, uncoated finish compatible with a broad range of workpiece materials
• Two spiral flutes assist chip evacuation during spotting engagement
• Straight cylindrical shank fits standard collet chucks and drill chucks
• Single-ended design optimized for dedicated spotting applications

Compatibility

Designed as a general-purpose spotting drill for use in CNC machining centers, manual mills, and drill presses equipped with collet chucks or drill chucks accepting a 4 mm straight cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel. Ensure the machine spindle is fully stopped and the tool is securely clamped in a properly sized collet or drill chuck before operation. Verify runout is within acceptable limits before beginning production to maintain hole location accuracy. Follow the machine manufacturer and applicable shop safety guidelines for speeds, feeds, and coolant use.