GB/T 275-2015 in English

《GB/T 275-2015滚动轴承 配合》由TC98（全国滚动轴承标准化技术委员会）归口，主管部门为中国机械工业联合会。
本标准规定了一般工作条件下的滚动轴承(以下简称“轴承”)与轴和轴承座孔配合选择的基本原则和要求。
注:一般工作条件系指主机对旋转精度、运转平稳性、工作温度等无特殊要求的情况。
本标准规定的配合适用于下列情况:
a) 轴承外形尺寸符合 GB/T273.1―2011、GB/T273.2―2006、GB/T273.3―2015,且公称内
径d≤500mm;
b) 轴承公差符合 GB/T307.1―2005中的0、6(6X)级;
c) 轴承游隙符合 GB/T4604.1―2012中的 N 组;
d) 轴为实心或厚壁钢制轴;
e) 轴承座为钢或铸铁件。
本标准不适用于无内(外)圈轴承和特殊用途轴承(如飞机机架轴承、仪器轴承、机床主轴轴承等)。

This standard specifies the basic principle and requirements for the selection of shaft and bearing housing hole fits for rolling bearings (hereinafter referred to as "bearings") under general operating conditions.
Note: general operating conditions refer to the conditions of the host without special requirements for running accuracy, operation smoothness, operating temperature, etc.
The fits specified in this standard are applicable to the following conditions:
a) The boundary dimensions of the bearings comply with GB 273.1-2011, GB 273.2 -2006 and GB 273.3-2015, and their nominal inside diameter d≤500mm;
b) The tolerances of the bearings comply with Grades 0 and 6(6X) in GB 307.1-2005;
c) The clearances of bearings comply with Group N in GB 4604.1-2012;
d) The shafts are solid or made of thick-walled steel;
e) The housings are made of steels or iron castings.
This standard is not applicable to the bearings without inner (outer) ring or the bearings for special purpose (such as airframe bearings, instrument bearings, and main shaft bearings of machine tools).

Foreword i
1 Scope
2 Basic Principle for Selection of Fits
3 Selection of Tolerance Zone
4 Common Tolerance Zone of the Fit between Bearing and Shaft/Bearing Housing Hole
5 Geometric Tolerances of Mating Surface and Retaining Shoulder
6 Roughness of Mating Surface and End Face
Appendix A (Informative) Calculated Values of the Fits between Radial Bearing and Shaft/Bearing Housing Hole
Bibliography