To hold the centerline on the workpiece will help the device shown in the figure.
Recommend to read
CUT “HEAVYWEIGHTS”
The eternal conflict of needs and means of their realization was particularly glaring after the start of construction of the "Washington" cruisers. Desyatitysyachnye high-speed ships are...
THE VALVE IS OF THE SPOOL
Every modeller wants the motor on his model, and starts with one pull, and worked "like clockwork." But the fine-tuning motor is not only extremely high precision. It requires not only...