Estimate the relative cost of grinding a steel part to a tol

Estimate the relative cost of grinding a steel part to a tolerance of ±0.0005 in versus turning it to a tolerance of ±0.003 in??

Solution

Solution :

Cost of Grinding to + or - 0.0005 in from table is 270%

Cost of turning to tolerance of + or - 0.0003 in from table is 60%

Hence Relative cost = 270/60 = 4.5 times