“S Series” planetary gear units are the innovative proposal Dana offers the market, improving the performance and application characteristics that determined the big success of the previous “PDL Series”, in production for about 30 years until 2005. The “S Series” is the optimum proposal for all applications requiring high torque with minimum dimensions, on fixed industrial equipment and also self-propelled machines. This planetary technology solution is preferable to solutions with traditional gear units as it offers an improvement of 40- 60% in terms of space and weight. The performance of “S Series” gear units, harmonically developed in 13 sizes, is optimized in terms of life and quietness. With its many output versions, numerous input possibilities.