Cages for NSK Cylindrical roller bearings

NSK standard cylindrical roller bearings use pressed, machined, or molded cages. The basic load ratings listed in the NSK bearing size chart are based on the cage classification as shown below.

Standard cages for NSK cylindrical roller bearings
Series Pressed stell cages (W) Machined brass cages (M) Molded polyamide cages (T)
NU10** - 1005 -- 10/500 -
N2** 204 -- 230 232 -- 264 -
NU2** 214 -- 230 232 --264 -
NU2**E 205E -- 213E 214E -- 240E 204E
NU22** 2204 -- 2230 2232 -- 2252 -
NU22**E - 2222E --2240E 2204E -- 2220E
N3** 304 -- 330 332 -352 -
NU3** 312 -- 330 332 -- 352 -
NU3**E 312 -- 330 332 -- 352 -
NU23** 2304 -- 2320 2322 -- 2340 -
NU23**E - 2322E -- 2340E 2304E -- 2320E
NU4** 405 -- 416 417 -- 430 -

For a given NSK bearing number, if the type of cage is not the standard one, the number of rollers may vary; in such a case, the load rating will differ from the one listed in the NSK bearing tables.

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