Mechanical Engineering Drawing Workshop

Reference of Fit System

CombinationBase hole

Classification

H6 H7 H8 H9

c9

Needs sufficient gap.(expansion, tolerance, fitting length)

d9 d9 e8

Rotating parts, or sliding parts.Fitting parts which are often taken apart.

f7f6 f7f8 g5 g6

Need detailed action.

h5h7h6h6h8

h9

Table 3