Fixed example of pulley
The following is an example of fixing a bearing with a fixing pin. Fix the bearing fixing pin pulley on the outer side of the bearing inner ring, and install the collar into the inner side of the bearing to fix it on the inner side of the bearing inner diameter, so as to realize the fixation on the inner and outer sides.
In terms of vibration, noise and abnormal sound
Silent and ultra silent bearings have been introduced, and the vibration extreme level of Chinese bearings is generally more than 10dB different from that of Japanese bearings.
In terms of life and reliability
Taking deep groove ball bearings as an example, the service life of foreign products is generally more than 8 times of the calculated service life (up to more than 30 times higher), and the reliability is more than 98% (or pursue the service life with the main engine), while the service life of Chinese bearings is generally only 3 to 5 times of the calculated service life, and the reliability is 96%.
In terms of high-speed performance
The DMN value of the product is 4 times 106 mm R / min, while that of Chinese bearings is only 2 times 106 mm R / min.
But now, China's bearing development has made continuous progress, and the technology and accuracy have been improved step by step. The products produced by some manufacturers have completely replaced the imported bearings, or after the comparison of all parameters and performance, the difference between the two sides is only less than 1%.
These data tell us that domestic products are more suitable in terms of performance and price.
If the idea is still old, it's time to change it.
However, the price of imported bearings to be considered is added with tariff. After removing this pulley part of added value, it is not much different from the price of domestic bearings.
