GB/T 12765-2023 in English
VALIDSpherical plain bearings—Mounting dimensions
- Issued on:2023-05-23
- Implemented on:2023-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$185.00
《GB/T 12765-2023关节轴承 安装尺寸》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。
Introduction
1. Standard background and revision notes
GB/T 12765-2023 "Spherical plain bearing installation dimensions" is the first comprehensive revision since the 1991 version, which mainly optimizes and supplements the installation dimensions and technical requirements of spherical plain bearings. The new standard replaces some technical content in the old version and introduces a wider range of application and higher precision requirements.
2. Design principles for installation dimensions of spherical plain bearings
The design of installation dimensions of spherical plain bearings should follow the following basic principles: The design of shaft shoulders, hole shoulders and fillet radii should ensure that the bearing rings have sufficient support surfaces to avoid contact between swinging parts and stationary parts. When installing radial spherical plain bearings (except W series), the maximum diameter of the shaft shoulder should not exceed the end face diameter of the bearing inner ring. At the same time, the maximum fillet radius of the shaft shoulder and hole shoulder must be smaller than the minimum single chamfer size of the bearing, and the back-cutting groove structure is allowed as an alternative.
3. Comparison of installation dimensions of different series of spherical plain bearings
| Series type | Key parameters | Revised content of the new standard | Scope of application |
|---|---|---|---|
| E series | da max. (maximum value of shaft shoulder diameter), Da min. (minimum value of bearing seat shoulder diameter) | - Increased the maximum limit of some sizes- Optimized the distinction between sealed and non-sealed bearings | Applicable to mechanical equipment under medium load and speed conditions |
| G series | da max., Da min. | - Expanded size range- Adjusted some minimum installation dimension requirements | Applicable to higher precision and wider working conditions |
| C series | da max.、Da min. | - Added installation dimensions for C series- Improved technical requirements for some large-size bearings | Applicable to large machinery and heavy load scenarios |
4. Implementation suggestions and precautions
Case study: When selecting the installation dimensions of spherical bearings, the appropriate series and specifications should be selected according to the specific application scenarios. For example, G series or C series are recommended for high-precision equipment; for small and medium load scenarios, E series is given priority to ensure cost-effectiveness.
Key Tips: During the actual installation process, it is recommended to refer to the structural diagram and table data in the standard to ensure that all parameters meet the technical requirements. At the same time, pay attention to the impact of the fillet radius design on the bearing service life to avoid early bearing failure due to improper design.
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