Counterboring Convenient plus tolerance is available for φ6 type 1st process: 2nd process: Guide hole Deep drilling (2ZDK060S-P) machining ◦Usage example of plus tolerance for φ6 type Suitable situation 1st process: Tool for guide hole machining: Minus tolerance 1st process: Tool for guide hole machining: Plus tolerance 2nd process: Tool for deep drilling : Minus tolerance 2nd process: Tool for deep drilling: Minus tolerance Tool for 2nd process 2nd process (Deep drilling) 2nd process 2ZDK060S-P interferes machining surface of 1st process Finished surface (Guide hole machining) of guide hole ・Hole distortion, bending ・Effects on finished surface No effect on · Effects on dimension of next process diameter L ● Applications Solid End Mill Plunge milling Hole Counterboring on Thin Plate Turning in Automatic Lathes / Turning Hole Expanding Internal Face Finishing Reduced Burrs Bottom Finishing after Drilling Counterboring on Slant Surface / Guide Hole Machining Flat Bottom Counterboring 1 Pass and Guide Hole Machining Machining with a Single Tool L48