Cylindrical roller and raceway are linear contact bearings. Large load capacity, mainly bearing radial load. Low friction between the rolling elements and the collar rib, suitable for high-speed rotation. It can be divided into single row cylindrical roller bearings (NU, NJ, NUP, N, NF, etc.) and double row cylindrical roller bearings (NNU, NN, etc.) according to whether the collar has rib. The bearing is a structure in which the inner ring and the outer ring can be separated.
For the cylindrical roller bearing with no rib on the inner ring or outer ring, the inner ring and outer ring can move relative to each other in axial direction, so it can be used as the free end bearing. Cylindrical roller bearings with double retaining edges on one side of the inner and outer rings and single retaining edges on the other side of the ferrule can withstand a certain degree of axial load in one direction. Generally, steel plate stamped retainer or copper alloy lathed solid retainer shall be used. However, some use a polyamide shaped retainer.
characteristic
Roller and raceway are in line contact or off-line contact, with large radial bearing capacity, suitable for bearing heavy load and impact load.
Small friction coefficient, suitable for high speed, limit speed close to deep groove ball bearing.
N-type and NU type can move axially, adapt to the change of relative position of shaft and shell caused by thermal expansion or installation error, and can be used as free end support.
The machining requirements for the shaft or seat hole are high. After the bearing is installed, the relative deflection of the outer ring axis shall be strictly controlled to avoid contact stress concentration.
The inner ring or outer ring can be separated for easy installation and removal.
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