Question

What are the tolerance values for a 1.5 mm diameter hole, which is machined using STEM?

(a) ± 0.025 mm

(b) ± 0.050 mm

(c) ± 0.075 mm

(d) ± 0.100 mm

This question was posed to me in examination.

This interesting question is from Shaped Tube Electrolytic Machining topic in portion Electrochemical Processes of Advanced Machining

Answer 1

The correct answer is (c) ± 0.075 mm

To explain I would say: Diametrical tolerance value increases with the increase in hole diameter, which varies as – ± 0.050 mm for 0.6 mm diameter hole, ± 0.075 mm for 1.5 mm diameter hole and ± 0.100 mm for 6 mm hole diameter.