1 Scope
This part of GB/T 304 specifies the fits of spherical plain bearings with shaft and housing hole under general working conditions as well as the technical requirements of matching surface.
This part is applicable to the following conditions:
- The spherical plain bearings with the boundary dimensions meeting GB/T 9161-2001 (excluding series K), GB/T 9162-2001, GB/T 9163-2001 (excluding series K and W) and GB/T 9164-2001 and with the nominal bore diameter of bearing less than or equal to 800 mm and the nominal outside diameter less than or equal to 1,000 mm;
- The spherical plain bearings with internal clearance meeting N Group;
- The solid shaft or hollow shaft with thick wall;
- The spherical plain bearings with the working temperature less than or equal to 100℃.
2 Normative References
The following normative documents contain provisions which, through reference in this part of GB/T 304, constitute provisions of this part. For dated reference, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this part are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative document referred to applies.
GB/T 9161-2001 Spherical Plain Bearings-Spherical Plain Bearings Rod Ends (eqv ISO 12240-4:1998)
GB/T 9162-2001 Spherical Plain Bearings-Thrust Spherical Plain Bearings (eqv ISO 12240-3:1998)
GB/T 9163-2001 Spherical Plain Bearings - Radial Spherical Plain Bearings (eqv ISO 12240-1:1998)
GB/T 9164-2001 Spherical Plain Bearings-Angular Contact Spherical Plain Bearings (eqv ISO 12240-2:1998)
Contents
Foreword I
1 Scope
2 Normative References
3 Fits Category and Shaft and Hole Tolerance Zones of Spherical Plain Bearings
4 Basic Principles for the Selection of Spherical Plain Bearing Fits
5 Surface Roughness and Form and Position Tolerance of Matching Surface and End Face
Appendix A (Normative) Calculated Value of Fits
