In fact, needle bearings are cylindrical roller bearings with long slim rollers (acc. to ISO, the roller length is min. 2.5 diameter)
Show small installation height, high accuracy and rigidity
Despite their low cross section, the bearings have a high load rating and are therefore very suitable for seating where radial dimensions are limited
Used, above all, for low speeds or swinging movements; also suitable for fluctuating and surge loads
Cannot retain any axial forces, however, allow axial misalignment of the rings
One or both rings may be omitted to reduce the installation height; however, seating surfaces on the shaft must then be hardened and machined carefully
Show high requirements for alignment of the journal and bearing body, the maximum permissible tilting angle is 3-4'
Delivered also with seals
没有评论:
发表评论