不銹鋼軸承精度

精度 TOLERANCE
軸承的精度包括尺寸精度和旋轉精度,尺寸精度是將軸承安裝于軸或軸承箱時所要求的項目,它包括內徑、外徑、寬度、倒角尺寸公差或允許值。幾何精度包括內徑 偏差、平均內徑差、外徑偏差、平均外徑差、套圈端面平行差的允許值。旋轉精度是規定旋轉時振擺的，包括內圈及外圈徑向擺動和軸向擺動，內圈側擺及外徑面垂 直度公差范圍。
軸承的精度等級從普通級0級到6級、5級、4級及2級，依次增高，下表1是中國GB307規定的精度等級與其他標準的比較。
Bearing tolerance includes dimensional tolerance and revolving tolerance, Dimensional tolerance is a request when bearings are mounted on shafts or in housings. It includes bore/outerside diameter deviation from basic, inner ring/outer ring width deviation in single radial plane. Revolving tolerance includes radial and axial runout of assembled bearing inner ring and outer ring, inner ring reference fcace runout with bore and outside cylindrical surface runout with outer reference face.
Tolerance class ranges from common class 0 to 6,5,4 and 2, from low to high, Table 1 below is the tolerance class stipulated in China GB307 and its comparison with some other standards.

部分國家軸承精度等級對照表 COMPARISON OF TOLERANCE CLASS