与不转动的外圈相配合的轴承座孔常采用 过渡配合 (Transition fits) J6、J7，或间隙配合(Clearance fits) 间隙配合 H7、G7等配合。
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There are three classes of fits: 1) clearance fits, 2) transition fits (the assembly may have either clearance or interference), and 3) interference fits.
存在三种配合：1）间隙配合，2）过渡配合（装配后可以有 间隙或过盈），和3）过盈配合。
Rational selection to tolerances, fits and clearance of rotor-bearing of impact crusher is very important to avoid overheat of bearing and prolong the life of bearing.
冲击式破碎机转子轴承公差配合及游隙的合理选择对防止轴承发热，提高轴承寿命具有十分重要的作用。
With tight fits (see pages 105 and 114) the axial clearance is reduced or the preload of the bearing pair increased.
过盈配合情况下（见第105和114页），轴向间隙减小，或者铰副预加负荷增加。
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