A single pulley all gear spindle drive system is preferred to a cone pulley drive. The advantages are in contary to the increasing cost. 1. A high power transmission because of high speed belt drive. 2. Quick speed change through levers, Speed changing takes partically no time, if pre-selector system is designed. 3. Possibility of individual drives, which avoid weaker counter shaft. 4. Belt life is enhanced, because it is not shifted. 5. Compact and thus saves space. Requires less floor spoace. Thus such a gear system can be housed in the headstock of a machine, where the motor can be placed at the bottom. The Advantage of Cone Pulle...
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