GB/T 32323-2015 in English

Professional background and significance

Rolling bearings are an indispensable key component in modern mechanical equipment, and their performance directly affects the service life and operating efficiency of the equipment. The GB/T32323-2015 standard specifies in detail the measurement method of the axial clearance of four-point contact ball bearings, providing an important technical basis for ensuring the quality of bearings and improving the reliability of equipment.

Background of standard formulation

As mechanical equipment develops towards high precision and high speed, the quality requirements for rolling bearings are increasing. Four-point contact ball bearings are widely used in aerospace, automobile manufacturing and other fields due to their large load-bearing capacity and good rigidity. However, the measurement technology of their axial clearance is relatively complex, and there are differences between different manufacturers. In order to unify industry standards, GB/T32323-2015 came into being.

Technology evolution analysis

From a historical perspective, the measurement of bearing clearance has evolved from empirical to standardized, and from simplification to diversification. In the early days, it mainly relied on manual operation, which had problems such as large errors and low efficiency. With the advancement of science and technology, modern measurement methods have combined advanced sensors and data processing technology to greatly improve measurement accuracy and reliability.

Comparison of standard frameworks

Detailed interpretation

1. Preparation before measurement

According to the standard requirements, the grease and rust inhibitor on the bearing must be thoroughly removed before measurement, and low-viscosity lubricant must be used for lubrication. For closed bearings, the measurement should be completed before closing to avoid external contamination affecting the results.

2. Technical conditions of measuring instruments

The design and use of measuring instruments must comply with the definition of bearing axial clearance in GB/T4199, and the technical parameters should meet JJG626 or other relevant regulations. For example, the accuracy error of the indicator should not exceed 0.5% of the full scale.

3. Measurement method

Instrument measurement method:Applicable to four-point contact ball bearings with a nominal inner diameter d≤260mm. Axially fix the outer ring or inner ring, apply the measuring load specified in Table 1 to the other ring, and read the clearance value on the indicator.

Simple measurement method:Manually apply pressure through the fulcrum and the pressure plate to measure the clearance values at three different positions respectively, and calculate their arithmetic mean. This method is suitable for small-batch production or on-site rapid detection.

Implementation suggestions

1. It is recommended that enterprises give priority to instrument measurement methods to ensure the accuracy and consistency of measurement results.
2. For small-batch production or maintenance occasions, the simple measurement method is an economically feasible option.
3. Regularly calibrate the measuring instrument to ensure that it meets the standard requirements.
4. Strengthen the operator's understanding of measurement principles and technical requirements during training.