 21304CDKE4 NSK e 0.31 20x52x15mm  Spherical roller bearings
  21304CDKE4 NSK e 0.31 20x52x15mm  Spherical roller bearings
                                

| Bearing number | 21304CDKE4 | 
| Size (mm) | 20x52x15 | 
| Brand | NSK | 
| Bore Diameter (mm) | 20 | 
| Outer Diameter (mm) | 52 | 
| Width (mm) | 15 | 
| d | 20 mm | 
| D | 52 mm | 
| B | 15 mm | 
| C | 15 mm | 
| r min. | 1.1 mm | 
| da min. | 27 mm | 
| da max | 28 mm | 
| Da min | 42 mm | 
| Da max. | 45 mm | 
| ra max. | 1 mm | 
| Weight | 0.17 Kg | 
| Basic dynamic load rating (C) | 29.3 kN | 
| Basic static load rating (C0) | 26.9 kN | 
| (Grease) Lubrication Speed | 6300 r/min | 
| (Oil) Lubrication Speed | 8200 r/min | 
| Calculation factor (e) | 0.31 | 
| Calculation factor (Y0) | 2.1 | 
| Calculation factor (Y2) | 3.2 | 
| Y3 | 2.1 | 
| hidYobi | 21304CDKE4 | 
| LangID | 1 | 
| Y1 | 2.1 | 
| D_ | 52 | 
| Y2 | 3.2 | 
| Macha rpm | 0 | 
| B_ | 15 | 
| CAD | https://service.web2cad.co.jp/pcom/maker_login.php?Maker=NSK_RB&language=ja&info=nsk_rb/roller_bearings/spherical_rb/tapered_bore_asmtab.prj&varset={STAN=-}.{ORDER=21304CDKE4}.{SD=20}.{D=52}.{B=15.0}.{R=1.1}.{CR1=29300}.{COR1=26900}.{LT=10000}.{LM=-}.{LG=6300}.{LO=8200}.{DA1=27}.{DA2=28}.{DA3=45}.{DA4=42}.{RA=1.0}.{E=0.31}.{Y2=3.2}.{Y3=2.1}.{Y0=2.1}.{MASS=0.17} | 
| da min | 27 | 
| hidTable | ecat_NSSPHR | 
| Oil rpm | 8200 | 
| Y0 | 2.1 | 
| mass | 0.17 | 
| GRS rpm | 6300 | 
| ra | 1 | 
| TSR rpm | 10000 | 
| C0 | 26.9 | 
| DE_ | 43.065 | 
| X0 | 1 | 
| Prod_Type3 | SRB_CTB_TB | 
| X1 | 1 | 
| X2 | 0.67 | 
| SIR | 4.5 | 
| e | 0.31 | 
| DA_ | 7 | 
| bomp | 21304CDKE4 | 
| Z_ | 13 | 
| ALP2 | 50 | 
| ALP1 | 11 | 
| ALP3 | 0 | 
| D_a max | 45 | 
| D_a min | 42 | 
| yobi | 21304CDKE4 | 
| ALPHA_ | 0.207 | 
| SDM_ | 36.214 | 
| r | 1.1 | 
| KBRG | 2321 | 
| SBRG | 3 | 
| DI_ | 29.362 | 
| calcUrl | /BearingGuide/html/calculation.jsp | 
 Detailed  Parameters
  Detailed  Parameters
                                     parameter:
  parameter:
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| 23056 CW33 Spherical roller bearings | Width :106mm ,Size :280x420x106mm ,Outer Diameter :420mm ,Bore Diameter :280mm ,Brand:CX ,d:280 mm | 
| K20x26x20 Needle roller bearings | Brand:ISO ,Outer Diameter :26mm ,Size :20x26x20mm ,Bore Diameter :20mm | 
| HJ-8811240 Needle roller bearings | Size :139.7x177.8x63.5mm ,Fw:139.7 mm ,Brand:Timken ,Outer Diameter :177.8mm ,Width :63.5mm ,Bore Diameter :139.7mm | 
| R173.13 Wheel bearings | Designation SKF:VKBA 1961 ,Designation Ruville:7313 ,Designation FAG:713619260 ,Brand:SNR ,Designation SX:CX370 | 
| SA1021 Angular contact ball bearings | Size :40x90x23.1mm ,Brand:FAG ,Bore Diameter :40mm ,d:40 mm ,Width :23.1mm ,Outer Diameter :90mm | 
| NUP2315 Cylindrical roller bearings | d:75 mm ,Size :75x160x55mm ,Outer Diameter :160mm ,Bore Diameter :75mm ,Brand:KOYO ,Width :55mm | 
| W678AZZ Deep groove ball bearings | Outer Diameter :12.000mm ,Size :8x12x3.500mm ,Width :3.500mm ,Bore Diameter :8.000mm ,Brand:NTN | 
| 22340 CCK/W33 Spherical roller bearings | Outer Diameter :200mm ,Size :420x200x138mm ,Brand:SKF ,Bore Diameter :420mm | 
| 2RT20501 Thrust roller bearings | Size :1023x1600x192mm ,Width :192.000mm ,Outer Diameter :1600.000mm ,Bore Diameter :1023.000mm ,Brand:NTN | 
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