Photos of counterbore characteristics
Good:
Burnished
Reject:
Not Burnished
Reject:
Non-Concentric
Tool Marks
Reject:
Damaged
Burnished tool
Reject:
Scratch
Reject:
Chatter
Reject:
Dirt
Good:
Burnished
Reject:
Not Burnished
Reject:
Non-Concentric
Tool Marks
Reject:
Damaged
Burnished tool
Reject:
Scratch
Reject:
Chatter
Reject:
Dirt