1.Round type frictiondrill : frictiondrill penetrate the workpiece while drawing the bushing to form a convex ring. The surface of the boss, suitable for thread sealing or nut washer.
2.Flat type frictiondrill (designated flat frictiondrill): the middle part of the drill grinding step melt cutter blades, and the hot melt drilling to penetrate the workpiece drawing to form a convex surface of the workpiece (ring cut milling and chamfer), make the surface smooth.
3. Material: tungsten steel
4. Use scene: metal processing
وصف
Material : Tungsten Steel
Type : Center Drill Bit
Use : Metal Drilling