NSK Cylindrical Roller Bearings, Single-Row  NF-Type, NF211W ,D=55



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NSK Cylindrical Roller Bearings, Single-Row  NF-Type, NF211W ,D=55


Boundary Dimensions
Basic Load Ratings
Limiting Speeds
d D B r
Fw Ew Cr C0r Thermal
Mechanical Grease Oil
NF211W 55 100 21 1.5 1.1   88.5 58 62.5 7500   5300 6300 0.661



Cylindrical roller bearings are classified into the following types depending on whether or not they have ribs on their rings:



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.
The NH type consists of NJ-type cylindrical roller bearings and HJ-type L-shaped thrust collars
The inner ring loose rib of the NUP type should be mounted so that the marked side is on the outside.



If a cage is nonstandard for a given bearing number the number of rollers may vary; in such a case, the load rating will differ from that listed in the bearing tables.
Many NN double-row bearings have tapered bores, and they are primarily used in the main spindles of machine tools. Cages are made of either molded polyphenylenesulfide (PPS) or machined brass.



□Formulation of Bearing Designations

Single-Row Cylindrical Roller Bearing



①Bearing type NU : Single-row cylindrical roller bearings
(Outer ring with both ribs + Inner ring without rib) Please refer to page C124 for detailed information.
②Dimension Series  10 : 10 Series, 2: 02 Series, 22 : 22 Series, 3 : 03 Series, 23 : 23 Series, 4 : 04 Series,
③Bore number   Less than 03, Bearing bore 01 : 12mm, 02 : 15mm, 03 : 17mm Over 04, Bearing bore Bore number X 5 (mm)
④Internal design E : High load capacity
⑤Cage  W : Pressed-steel Cage, M : Machined Brass Cage, No designation : Machined-brass cage (in Series 10) T : Polyamide 66 resin cage, T7 : L-PPS resin cage
⑥Internal clearance  For All Radial Brgs.
Omitted : CN clearance, C3 : Clearance greater than CN, C4 : Clearance greater than C3, CG : Special Clearance
For Non-Interchangeable Cylindrical Roller Bearings
CC : Normal Clearance, CC3 : Clearance greater than CC, CC4 : Clearance greater than CC3, CCG : Special Clearance
⑦Tolerance class  Omitted : ISO Normal,P6 : ISO Class 6,
P5 : ISO Class 5,P4 : ISO Class 4
⑧NSKHPSTM  & : NSKHPSTM Designation Tolerance Class : ISO Normal
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