Sherline Lathe User Guide and Specifications

FIGURE 7-Cross section of headstock showing locking screw.
The screw in the front center of the headstock has a cone point. The pivot pin has a
tapered slot with a corresponding angle. When the screw is tightened, its angled face
engages the groove and, because the pivot pin can not come up, it draws the headstock
down into position, clamping it into place. If the pin were rigid, it could keep the
headstock from pulling down squarely.
FIGURE 8-Headstock and alignment key in position over lathe.