To this second sleeve the line shown standing vertically on the left of the hand wheel is attached, so that operating this handle revolves the second sleeve and the two sleeves screw together, their coned ends abutting in their correspondingly coned seats in the tailstock bore, and thus causing the first-mentioned and split sleeve to close upon the dead centre spindle and yet be locked to the tailstock.
As the bore of the tailstock is exactly in line with the live spindle, it follows that the dead spindle will be locked also in line with it.
Fig. 521.
Fig. 522.
[Figs. 521] and [522] represent sectional views of the carriage and slide rest of these lathes of a size over 16 inches swing. On the feed rod there are two bevel pinions p, one on each side of the bevel-wheel a, and by a clutch movement either of these wheels may be placed in gear with bevel-wheel a.
The clutch motion is operated by a lever which, when swung over to the right, causes the bevel pinion on the right to engage with the bevel-wheel a, and the carriage feeds to the right, while with the lever swung over to the left the carriage feeds to the left.