Program
An operator
A cam
A plug board system
Deburring hole end
Enlarge hole to accurate size
Finishing deep
Accommodate socket head screws
Counter boring is the operation of enlarging the end of a hole using a tool called counterbore. Counter boring is done for accommodating socket head screws.
Lathe
Boring Machining
Jig boring machine
Shaping machine
Milling
Turning
Drilling
Grinding
2:3
3:2
5:3
3:5