A common arrangement for driving a lathe spindle, in either direction at several definite speeds, is to provide a countershaft on which are mounted two fixed pulleys and two loose pulleys to accommodate two driving belts from the main shaft, one of which is open and the other crossed.
Motion in either direction is thereby obtained, and a considerable variation in the speed of rotation can be obtained by providing a cone pulley on the countershaft, which drives the cone pulley secured to the lathe E FIG.
Mounted on the maker's heavy cast-iron stand with chip tray, shelves and a built-on 12-speed all V-belt drive countershaft unit.
Several other stand-mounted options were available to replace or compliment the standard intermediate countershaft and further details of these can be found here.
The countershaft pulley shaft was fitted with self-aligning ball bearings and provision was made to allow individual adjustment of each belt run.
The motor countershaft unit, which ran entirely on ball bearings, was contained within the base on its own adjustable mounting plate.
The RS 50 uses a liquid cooled single cylinder two stroke, with reed intake and balancing countershaft.
The unit was designed to be run from a two-speed countershaft at 585 and 160 rpm.
This advanced power unit features water cooling, balancing countershaft, exhaust control valve and reed intake for riding pleasure and constant power.
This is the long splined shaft with a sixteen tooth spur gear at one end on which are mounted the other countershaft gears.