To hold the centerline on the workpiece will help the device shown in the figure.
Recommend to read
ASSISTANTS MOTORIST
DEVICE FOR CHARGING BATTERIES is a rectifier device with electronic current regulator (Fig. 1). A rectifier manufactured by bridge circuit of diodes V1 — V4 (Fig. 2), and the electronic...
RETRO SHELF FOR KITCHEN
What the shelf life is not I had to do for the home and garden. After all, not every purchase can fit into the interior of the apartment: the shape does not like it, the size is not...