- To determine the maximum drum size, divide 360 by the second count. 
   e.g. 360/10 = 36 ins. dia.
- To determine the minimum drum size, divide 180 by the second count. 
   e.g. 180/10 = 18 ins. dia
- To determine the maximum take-up pulley, divide 120 by second count. 
   e.g. 120/10 = 12 ins. dia
- To determine the minimum take-up pulley, divide 60 by second count. 
   e.g. 60/10 = 6 ins. dia