Measurement Units Of Vibration In Roll Mills. Our imperial system of measurement has its benefits.Especially for those in construction.Base 10 is only divisible by 1,2,5,10.Base 12 imperial or standard is divisible by 1,2,3,4,6,12.8 is also a handy in this system as it divides cleanly at 24, 48, etc.We do have reasons for keeping our standard of measurement.