Needle roller bearings are short for section height, but the burthen content and rigidity are bigger than common bearing. They have small inertia and fit shaking movement. Using this bearing can achieve small and lightness of technical design. Needle roller bearing is the bearing with holding shelf and without skiding phenomenon. The attrition quotiety is the same as common bearing with low moving temperature and high speed circumvolving. There are various models, such as HK/BK series, HK..RS/HK..2RS series, BK..RS series, NA/RNA/NK series; HF/FC series and HFL/FCB series.
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