50. How would you divide a workpiece into 22 equal divisions using the simple indexing method on a universal dividing head? Hole circles available are: 21-23-27-29-31-33. turn(s) plus hole(s) on the hole circle 51. Calculate the indexing necessary to produce an angular move of 25 degrees 40 minutes (2540') using a standard dividing head. Hole circles available are the same as before: 21-23-27-29-31-33. turn(s) plus hole(s) on the hole circle