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What Are the Types of Cam Follower?


Bolted roller bearings, also known as cam followers, are a common type of structure used in roller bearings. The outer ring of cam followers is relatively thick with a curved outer wall and a solid inner shaft with threads for fixing purposes. The rolling elements can either be a retaining cage or a full set of rolling element components, with single or double-row design. Their load characteristics are the same as supporting roller bearings, and they come in both sealed and open designs with or without an eccentric sleeve.


Cam followers are suitable for heavier radial loads and have the ability to withstand heavier axial loads due to the fact that the outer ring is guided by the rollers in the axial direction. They can operate at relatively high speeds, but due to the full set of rollers, lubricating grease needs to be replenished frequently, which can be done through the holes on both ends of the shaft and on the center shaft.


Basic NUKR series cam followers


The NUKR series cam followers are full-set double-row cylindrical roller structures.


Eccentric sleeve NUKRE series cam followers


The NUKRE series cam followers are similar to the NUKR series, with the only difference being that the NUKRE series has an eccentric sleeve on the shaft.


PWKR series cam followers


PWKR series cam followers are also similar to the NUKR series, both of which are full-set double-row cylindrical roller structures, with the only difference being that the outer ring of the PWKR series has double rollers with two separate rows of rollers.


NUKRA series cam followers with side rollers


The NUKRA series cam followers have a similar appearance to the NUKR series, except that the NUKRA series has a double-headed bolt and an additional side roller at the end of the bolt, resulting in a single-row full-set cylindrical roller structure. 


KR series cam followers


The KR series cam followers are rolling needle cage component bearings, with the outer ring guided by a stop edge on the bolt and a stop ring fixed to the bolt in the axial direction. They can withstand heavy loads and intermediate speeds due to a greater amount of grease storage space, which extends their lubrication cycle. KR is similar to NUKR, with the only difference being that KR has stop rings on both ends, while NUKR has stop rings on only one end.


KRV series cam followers


The KRV series cam followers are full-set rolling needle bearings, with the outer ring guided by a stop edge on the bolt and a stop ring fixed to the bolt in the axial direction. They can withstand heavier loads but lower speeds, requiring frequent lubrication with grease. KRV is similar to NUKR, with the only difference being that KRV has stop rings on both ends, while NUKR has stop rings on only one end.


Cam followers are generally full-set roller structures. The bolt shaft's roller race is heat-treated to avoid stress concentration, while the outer ring's thick-walled outer surface is curved to prevent stress concentration. The outer ring has two integral stop edges, guided axially by rollers. The bolt head and pressed side stop ring provide axial support to the outer ring through the rollers.