Spot Drill Bit Round Shank Step Countersunk M3-M12 for Nonferrous Metals Bright Uncoated 3-Year Warranty OEM Customized
These two-step straight shank step drills are manufactured from premium W6542 high-speed steel with integral nitriding hardening. Available in sizes M3 to M12 with 90° and 180° step angles, they are designed for countersunk screw holes and stepped bore machining on various drilling equipment.
The nitrided surface delivers outstanding wear resistance, fatigue strength and high-temperature stability for prolonged service life. Precision sharpened cutting edges and optimized flutes ensure smooth chip evacuation, clean hole surfaces and consistent dimensional accuracy.
Combining drilling and countersinking in one tool, they eliminate secondary finishing operations to streamline production. They cut tool changeovers, reduce overall machining costs and effectively improve working efficiency for metal processing applications.
