The new standard for the determination of the bearing capacity of national lubricants---PB point is no longer kgf!

The new standard for the determination of the bearing capacity of national lubricants---PB point is no longer kgf!
PB points are no longer kgf! ---Chenda, the new standard for the determination of the national standard lubricant carrying capacity, will interpret it for you. The four-ball friction and wear tester is a test equipment for testing the friction and wear performance of lubricants. This equipment is designed according to the national standard GB/T 3142. It has been used in GB/T 3142-1982. It was revised in March this year. The latest The standard is GB/T3142-2019, and this standard will be officially implemented on October 1, 2019. So what are the changes to the old and new standards? The editor of Chenda will explain it for you! 1. The unit of measurement adopts the International System of Units. The pb point and sintering load of the lubricant we often talk about is no longer a certain kilogram, but a certain Newton. 2. Added Chapter 2 normative references. 3. Move the compensation line of the four-ball friction testing machine in Figure 1 of GB/T3142-1982 to Appendix B. 4. Correct the description errors in GB/T3142-1982 and change the '5%' in 3.4 and 8.9 to (1+5%). The expression of P in the formula is added in 5.3.6, and an explanation is given for the lever type four-ball machine. Add a detailed description of the reagents in 6.5.1. The requirements for the material and hardness of the test steel balls are added in 7.5.2. 8. A detailed description of the instrument is added in Chapter 6. 9. Expand the load range of the four-ball machine and change it to '59N-9810N'. Corresponding changes have been made in 6.1. The load level 23 is added to Table 1, and the corresponding composite correction sum data is added to Table 4. 10. Increase the related content of four-ball machine calibration. 6.1 An explanation of the calibration of the four-ball machine is added in the note. Table A.1 in Appendix A makes corresponding amendments to the reference grease of the four-ball machine and adds an explanation. 11.7.1 In the preparation work, increase the preparation for the speed of the four-ball machine and the test environment temperature. 12. In Chapter 8, the detailed test procedures and precautions have been added, and the steps for reading the diameter of the wear scar have been specified in detail. 13. For ease of use, table 3 is added to 8.9. This table is established according to the PB's test level, and the operator can directly perform the test according to the level of the table. Add new lubricants especially the unconventional lubricant PB determination method in this article. In 14.8.11, add the description about the PB level when looking up Table 4. Testing Machine Manufacturing Co., Ltd. specializes in the Ru0026D and production of tribological testing equipment and mechanical testing machines. Production license number: Luzhi 01000435; EU CE certification number: 743-CI-32015; SGS certification report number: QIP-ASI145774 . In recent years, in order to facilitate the needs of customers engaged in tribology research and industrial applications in universities, scientific research institutions, enterprises and institutions, our company has extensively cooperated with Nanyang Technological University (NTU) in Singapore, HBM in Germany, ABB in Sweden, and TRANSCELL in the United States. Cooperation, constantly update the test and test technology and functions, and launched a batch of friction and wear testing machine products that cover domestic standards, are synchronized with international standards, and include advanced national technical conditions for tribological test levels. The products of Testing Machine Manufacturing Co., Ltd. are excellent testing equipment worthy of your trust and entrust! In your scientific research activities in many fields such as material mechanics, mechanical tribology, mechanical transmission, tribochemistry, product process inspection, etc., Chenda products are always your handy helper! As long as you give us the test conditions, we will never let you down. We provide you with high-quality test machines and reliable test data! Thank you for your choice and trust! For details, please pay attention to: http://www.jnshiyanji.com.cn


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