The tolerances on the transverse dimensions of machined test pieces are given in table C.2.
An example of the application of these tolerances is given below:
a) Machining tolerances
The value given in table C.2, for example ± 0,075 mm for a nominal diameter of 10 mm, means that no test piece shall have a diameter outside the two values given below, if the nominal value of the original cross-sectional area (S₀) is to be included in the calculation without having to measure it:
10 + 0,075 = 10,075 mm
10 - 0,075 = 9,925 mm
b) Tolerances on shape
The value given in table C.2 means that, for a test piece with a nominal diameter of 10 mm which satisfies the machining conditions given above, the deviation between the smallest and largest diameters measured shall not exceed 0,04 mm.
Consequently, if the minimum diameter of this test piece is 9,99 mm, its maximum diameter shall not exceed 9,99 + 0,04 = 10,03 mm