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Atlas 10-inch Countershafts
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Countershafts could be had in both "vertical" and "horizontal" models. As offered in standard form the vertical type was not fitted with a belt-run guard (but individual guards were fitted to the backgears above, left) whilst the horizontal type (above, right and below) leant itself more readily to a simple guard that covered just the front run of the headstock belt (below).
An all-enveloping "safety" enclosure that appealed to schools and other training establishments was available for both the vertical and horizontal countershafts.
The method of containing and aligning the countershaft's "Hyatt" roller bearings was simple, ingenious and inexpensive to manufacture; each was held against two adjuster screws that socketed into shallow dimples placed 180° apart on their outside surface. Because the bearings were free to swivel they automatically took up a free-running position and it was then a relatively simple matter, using a steel straight edge, to make fine adjustments (to the screws) in order to get the countershaft pulley lined up exactly with that on the headstock.

Horizontal-countershaft lathe fitted with a cover to guard just the front section of the belt's run.

Another view of the vertical countershaft for use with individual backgear guards and unguarded belt runs.

Horizontal countershaft model with complete enclosure of the belts, pulleys and backgears with neat cast-aluminium covers.

Vertical countershaft model with full safety enclosures.