In the precise operation world of machine tools, the precision of bearings is just like the stability of a heartbeat, directly determining the overall operation quality. Taking the 7206 and 7308 bearings as examples, they demonstrate their unique performance charm under different precision grades.
For the 7206 bearing, when the precision grade is P4, the radial runout is strictly controlled within ≤3 µm, and the axial runout is within ≤5 µm, with a very high rotational accuracy. This high-precision feature makes it the top choice for high-precision machine tool spindles and precision equipment. During high-speed and high-precision machining processes, it is like an elegant dancer, with minimal vibration and extremely high stability, ensuring that every cutting operation is precise and error-free. It helps carve out high-precision components in fields such as aerospace and electronic precision manufacturing, facilitating the birth of cutting-edge technological products. When the precision grade is P5, with a radial runout of ≤5 µm and an axial runout of ≤7 µm, the rotational accuracy remains relatively high. At this time, it is suitable for standard precision equipment and industrial transmission devices. In these scenarios, it provides efficient and stable performance with moderate precision, ensuring the smooth operation of the production line. Whether it is the automated assembly equipment in the light industry or the transmission links in the general industry, its reliable figure can be seen everywhere.
The 7308 bearing is no exception. Under the P4 precision grade, the radial runout is ≤4 µm, and the axial runout is ≤6 µm. Its combination of very high rotational accuracy and strong load-bearing capacity is tailor-made for heavy-duty precision machining equipment and high-load machine tools. In fields such as large shipbuilding and heavy machinery processing, facing huge cutting forces and high-load operation requirements, it stays firmly in its position and safeguards high-precision machining, ensuring that every large component can meet strict precision standards. When the precision grade is P5, with a radial runout of ≤6 µm and an axial runout of ≤8 µm, the high rotational accuracy meets the requirements of general machine tools and mechanical transmission devices. In the general machinery manufacturing industry, it stably transmits power and supports the smooth operation of mechanical structures, helping various mechanical equipment complete daily production tasks with reliable performance.
The 7206 and 7308 bearings with different precision grades are just like versatile players in the precision machinery field. They accurately match the diverse requirements of machine tools and equipment, laying a solid foundation for the vigorous development of modern manufacturing and demonstrating the beauty of industrial precision in every detail.
| Bearing Model | Precision Grade | Radial Runout | Axial Runout | Rotational Accuracy | Application Scenarios | Features |
| 7206 | P4 | ≤3 µm | ≤5 µm | Very High | High-precision machine tool spindles, precision equipment | Provides high stability and ultra-low vibration, suitable for high-speed operations |
| P5 | ≤5 µm | ≤7 µm | High | Standard precision equipment, industrial transmissions | Moderate precision, suitable for efficient and stable performance | |
| 7308 | P4 | ≤4 µm | ≤6 µm | Very High | Heavy-duty precision machining equipment, high-load machine tools | High load capacity ensures reliability in high-precision applications |
| P5 | ≤6 µm | ≤8 µm | High | General machine tools, mechanical transmission devices | Reliable performance for medium precision and stable operation |
