| 1 | Drill and countersink the holes to keep wood from splitting. | |
| 2 | This article introduces the design and work principle of NC back spotfacer. | |
| 3 | A set of technological equipment of front_to_back spot facing which is suited for different aperture is introduced. | |
| 4 | This article mainly introduces the design and work principle of a new back spotfacer. | |
| 5 | Point-to-point systems are suitable for hole-machining operations such as drilling, countersinking, counterboring , reaming, Boring, and tapping. |