Urning Diameter = th = L x Ps  min
                      n x f

*Ps : No of passes (how many times)
*th : Processing Time (min)
*f : Length Delivery (mm)

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Length Turning = th = d x π x L x Ps  min
                      Vc x 1000 x f
 

*Length Head Turning         L =  d1-d2  mm
                                     2

*Solid Stock Front Turning      L =   d    mm
                                      2