N-type and NU-type axial movement, to adapt to the thermal expansion or installation error caused Shaft and shell relative position changes, the most suitable for use as free end bearings

NJ type and NF type can withstand a certain degree of one-way axial load

NH type and NUP type can withstand a certain degree of two-way axial load inner ring or outer ring Can be separated, easy to dismantle

NNU type and NN type radial load resistance of the rigid, mostly for the machine tool spindle.

Features:
1. Radial load capacity, suitable to withstand heavy load and shock load.
2. The friction coefficient is small, suitable for high speed, speed limit near the deep groove ball bearings.
3. N type and NU type can move axially, able to adapt the relative position change caused by thermal expansion or installation error of shaft and housing, can be used for supporting the free end.
4. have a higher request on shaft or housing bore machining, the relative deflection of outer ring axia should be strictly controlled after installation to avoid contact stress concentration.
5. The inner or outer ring separable, easy installation and removal.

Structure:
single row:

N outer ring unflanged, inner ring both sides flanged.

NU outer ring two sides flanged, inner ring unflanged.

NF outer ring one side flanged, inner ring both sides flanged.

NJ outer ring two sides flanged, inner ring one side flanged.

NUP outer ring two sides flanged, inner ring one certain side flanged, the other side has loose rib.

NFP outer ring one certain side flanged, the other side has loose rib, inner ring two sides flanged.

NH  NJ bearing + HJ separate thrust collar
 

double row: 

NN outer ring unflanged, inner ring both sides flanged, also flanged in the middle.

NNU outer ring both sides flanged, also flanged in the middle, inner ring unflanged.

NNF full complement & double rows, composed by one middle flanged outer ring + two both sides flanged inner ring.
 

four row:

FC, composed by two outer rings and one inner ring, two outer rings both sides flanged, and middle flanged, inner   ring unflanged.

FCD, composed by two NN type.

*Four row cylindrical roller bearings are mainly used in the cold, the hot rolling mill, billet and other rolling mill machinery, bearings for the separation of structure, bearing rings and the rolling element can be easily separated, and therefore, the bearing cleaning, inspection or installation disassembly are very convenient

Mainly applicable cage:
Steel stamping cage (Z-shaped), copper alloy cutting cage, pin-type cage, synthetic resin forming cage.

Application:
Medium-sized motors, locomotives, machine tool spindle, internal combustion engines, generators, gas turbines, gear boxes, rolling mill, vibrating screen and lifting transportation machinery.

Series:
RNU/N/NU/NJ/NUP200
RNU/N/NU/NJ/NUP300
RNU/N/NU/NJ/NUP400
RNU/N/NU/NJ/NUP1000
RNU/N/NU/NJ/NUP1100
RNU/N/NU/NJ/NUP1800
RNU/N/NU/NJ/NUP1900
RNU/N/NU/NJ/NUP2200
RNU/N/NU/NJ/NUP2300
RNU/N/NU/NJ/NUP3000
NNU/N/NU/NJ/NUP4900

NN3000

NNU4100

NNU4900