Coupling shaft hole fit tolerance, XINLAN analysis

CouplingThe fit tolerance of the shaft hole (fit tolerance) refers to the sum of the hole and shaft tolerances that make up the fit.It is the amount of variation that allows clearance or interference.The tolerance zone size and tolerance zone position of the hole and shaft constitute the fit tolerance.The size of the coupling hole and shaft fit tolerance indicates the matching accuracy of the hole and the shaft.The size and position of the tolerance zone of the hole and shaft fit indicate the accuracy and nature of the fit between the hole and the shaft.

The size of the fit tolerance = the size of the tolerance zone; the size and position of the fit tolerance zone = the nature of the fit.

①当轴承内径公差带与轴公差带构成配合时，在一般基孔制属过渡配合的公差代号将变为过盈配合，如k5、k6、m5、m6、n6等，但过盈量不大；当轴承内径公差代与h5、h6、g5、g6等构成配合时，不在是间隙而成为过盈配合。

②Because the tolerance value of the bearing outer diameter tolerance zone is different from that of the general reference shaft, it is also a special tolerance zone. In most cases, the outer ring is fixed in the housing hole, and some bearing components require adjustments due to their structural requirements. Too tight, often with H6, H7, J6, J7, Js6, Js7, etc.

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