Male taper measurer 2

The taper to be measured is in blue color. Let the yellow and red tubes contact with the taper to get A dimension (distance between two faces). tanα = ((D2-D1)/(A L2-L1))2 α: haft taper angle D2 and L2: inner diameter and length of the yellow tube D1 and L1: inner diameter and length of the red tube If L2 = L1 then tanα = ((D2-D1)/A)2 In case of go-no and go control the red area on the scale of the red tube should be used. It is determined according to the tolerance of taper angle α. This measurement is f