(8) Space limitalion. Given the diameters of the two sprockets, the minimum center distance is half the sum of the two diameters; and a space limitation is imposed and it is defined as the sum of the minimum center distance and the calculated center distance. Space limitation is to ensure
that the drive, which includes the two sprockets and shafts, is able to fit into the available space so as not to affect the drive design.
(9) Galling speed limif. By solving eqn (3), the galling speed limit is found to be 5273.14rpm, which is above 1200rpm. Therefore, the drive is safe.
Note that only a table for S, is required. Other selection processes are computer-generated.