NTN bearings units combine a double-sealed ball bearing with various types of bearing housing. These are optimal units which are self-aligning at the spherical fitting surface of the bearing and housing. In particular, set screw type bearing units use NTN's unique set screw with a ball, and this is extremely effective for stopping loosening of the set screw, even when there is a vibrating or impact load. (Ref. catalog "Bearing units" CAT. No. 2400E etc.)
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