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Cylindrical Roller Bearings are bearing in which cylinders are used as the rolling elements as opposed to balls in ball bearings. As such, the rollers have a greater (linear) contact area with the outer ring and are distribute loads across a broader surface.
There are different types designated as NU, NJ, NUP, N, NF (for
single-row bearings), NNU,
and NN (for double-row bearings depending on the design or absence
of side ribs).
The outer and inner rings of all types are separable.
Types NU, N, NNU, and NN are suitable as free-end bearings. Types
NJ and NF can sustain limited axial loads in one direction. Types
NH and NUP can be used as fixed-end bearings.
NH-type cylindrical roller bearings consist of the NJ-type
cylindrical roller bearings and HJ-type L-shaped thrust collars.
The inner ring loose rib of an NUP-type cylindrical roller bearing
should be mounted so that the marked side is on the outside.
Bearing Model | Inner dia (mm) | Outer dia (mm) | Thickness (mm) | Weight (Kg) |
NJ303 | 17 | 47 | 14 | 0.12 |
NJ304 | 20 | 52 | 15 | 0.17 |
NJ305 | 25 | 62 | 17 | 0.29 |
NJ306 | 30 | 72 | 19 | 0.41 |
NJ307 | 35 | 80 | 21 | 0.55 |
NJ308 | 40 | 90 | 23 | 0.75 |
NJ309 | 45 | 100 | 25 | 1.05 |
NJ310 | 50 | 110 | 27 | 1.15 |
NJ311 | 55 | 120 | 29 | 1.50 |
NJ312 | 60 | 130 | 31 | 1.90 |
NJ313 | 65 | 140 | 33 | 2.30 |
NJ314 | 70 | 150 | 35 | 2.80 |
NJ315 | 75 | 160 | 37 | 3.35 |
NJ316 | 80 | 170 | 39 | 4.00 |
NJ317 | 85 | 180 | 41 | 4.80 |
NJ318 | 90 | 190 | 43 | 5.55 |
NJ319 | 95 | 200 | 45 | 6.45 |
NJ320 | 100 | 215 | 47 | 7.65 |
NJ321 | 105 | 225 | 49 | 9.00 |
NJ322 | 110 | 240 | 50 | 11.1 |
NJ324 | 120 | 260 | 55 | 13.5 |
NJ326 | 130 | 280 | 58 | 18.4 |
NJ328 | 140 | 300 | 62 | 23.0 |
NJ330 | 150 | 320 | 65 | 28.0 |
NJ332 | 160 | 340 | 68 | 33.5 |
NJ334 | 170 | 360 | 72 | 38.6 |
NJ336 | 180 | 380 | 75 | 44.6 |
NJ340 | 200 | 420 | 80 | 58.1 |