The appearance of NSK slewing bearing seems like a rotatory gear, it divided into internal gear DBS and external Gear DBD types. The internal gear series is single row ball bearing type, the external DBD type is double row rotary type applicable for motive power shovel, crane, revolving crane jib as well as other large construction machinery. The bearing suffix Y means without the outer ring without seal, T means with rubber seal, T3 means with contact type rubber seal.we offer a wide range of NSK DBS slewing beairngs, external gear, OD 330~558mm, and other high precision slewing rings.NSK DBS External gear teeth slewing bearing   and we specialize in NSK type NRXT series crossed roller bearing. This series bearing is a kind of thin section bearings, has the feature of light weight, high rigidity and high precision.  NRXT crossed roller bearings' outer ring is split while inner ring is integrated, so it's suitable for applications where high running accuracy of the inner ring is required.