 2304S NTN 20x52x21mm  Bore Diameter  20mm Self aligning ball bearings
  2304S NTN 20x52x21mm  Bore Diameter  20mm Self aligning ball bearings
                                

| rs min | 1.1 mm | 
| e | 0.5 | 
| Y1 | 1.2 | 
| Y2 | 1.9 | 
| Y0 | 1.3 | 
| Radial clearance class | CN | 
| Precision class | P0 | 
| Mass | 0.19 kg | 
| Dynamic load, C | 18.5 kN | 
| Static load, C0 | 4.7 kN | 
| Nlim (oil) | 14.000 rpm | 
| Nlim (grease) | 11.000 rpm | 
| Min operating temperature, Tmin | -20 °C | 
| Max operating temperature, Tmax | 120 °C | 
| da min | 26.5 mm | 
| Da max | 45.5 mm | 
| ra max | 1 mm | 
| Bearing number | 2304S | 
| Size (mm) | 20x52x21 | 
| Brand | NTN | 
| Bore Diameter (mm) | 20 | 
| Outer Diameter (mm) | 52 | 
| Width (mm) | 21 | 
| d | 20 mm | 
| D | 52 mm | 
| B | 21 mm | 
| C | 21 mm | 
| r min. | 1.1 mm | 
| da min. | 26.5 mm | 
| Da max. | 45.5 mm | 
| ra max. | 1 mm | 
| Weight | 0.193 Kg | 
| Basic dynamic load rating (C) | 18.5 kN | 
| Basic static load rating (C0) | 4.7 kN | 
| (Grease) Lubrication Speed | 11 000 r/min | 
| (Oil) Lubrication Speed | 14 000 r/min | 
| Calculation factor (e) | 0.5 | 
| Calculation factor (Y0) | 1.3 | 
| Calculation factor (Y1) | 1.2 | 
 Detailed  Parameters
  Detailed  Parameters
                                     parameter:
  parameter:
                                        | UKT317H Bearing units | B1:82 mm ,A5:48 mm ,A2:64 mm ,d1:110 mm | 
| 6810 Deep groove ball bearings | Outer Diameter :65mm ,Size :50x65x7mm ,Bore Diameter :50mm ,Brand:KOYO | 
| 7018 CD/HCP4AH1 Angular contact ball bearings | Brand:SKF ,Size :90x140x24mm ,Width :24mm ,Outer Diameter :140mm ,Bore Diameter :90mm | 
| H71918AC Angular contact ball bearings | Width :18mm ,Brand:AST ,Outer Diameter :125mm ,Bore Diameter :90mm ,Size :90x125x18mm | 
| 22338-K-MB+AH2338G Spherical roller bearings | Outer Diameter :400mm ,Bore Diameter :190mm ,Brand:FAG ,Width :132mm ,Size :190x400x132mm | 
| NF38/950 Cylindrical roller bearings | Width :150mm ,d:950 mm ,Size :950x1150x150mm ,Outer Diameter :1150mm ,Brand:ISO ,Bore Diameter :950mm | 
| KBL25112 Linear bearings | Brand:NBS ,Outer Diameter :40mm ,d:25 mm ,D:40 mm ,Bore Diameter :25mm | 
| 21318-E1-K Spherical roller bearings | Outer Diameter :190mm ,Size :90x190x43mm ,Brand:FAG ,Bore Diameter :90mm | 
| 6311/HC5C3 Deep groove ball bearings | Bore Diameter :120mm ,Size :120x55x29mm ,Width :29mm ,Brand:SKF ,d:55 mm ,Outer Diameter :55mm | 
| 6213-2RS Deep groove ball bearings | Brand:Fersa ,Width :23mm ,Size :65x120x23mm ,d:65 mm ,Outer Diameter :120mm ,Bore Diameter :65mm | 
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