2304K KOYO Calculation factor (e) 0.49 20x52x21mm Self aligning ball bearings
| Bearing number | 2304K |
| Size (mm) | 20x52x21 |
| Brand | KOYO |
| 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 | 0.205 Kg |
| Basic dynamic load rating (C) | 18.0 kN |
| Basic static load rating (C0) | 4.70 kN |
| (Grease) Lubrication Speed | 11000 r/min |
| (Oil) Lubrication Speed | 15000 r/min |
| Calculation factor (e) | 0.49 |
| Calculation factor (Y0) | 1.35 |
| Calculation factor (Y1) | 1.29 |
Detailed Parameters
parameter：
| 30208-A Tapered roller bearings | Outer Diameter :80mm ，Width :19.75mm ，Brand:FAG ，Bore Diameter :40mm ，Size :40x80x19.75mm |
| 390A/394A Tapered roller bearings | Outer Diameter :110mm ，Brand:ISO ，Size :63.5x110x22mm ，Bore Diameter :63.5mm ，Width :22mm |
| NF321 E Cylindrical roller bearings | Size :105x225x49mm ，Width :49mm ，Outer Diameter :225mm ，Bore Diameter :105mm ，d:105 mm ，Brand:CX |
| LME5UUAJ Linear bearings | Brand:Samick ，Bore Diameter :5mm ，Width :14.5mm ，Size :5x12x14.5mm ，Outer Diameter :12mm |
| UC208 Deep groove ball bearings | Size :40x80x49.2mm ，Bore Diameter :40mm ，Outer Diameter :80mm ，Brand:ISO |
| 51188 Thrust ball bearings | d:440 mm ，Bore Diameter :440mm ，Brand:CX ，Outer Diameter :535mm |
| SE 6001 ZZSTMSA7 Deep groove ball bearings | Outer Diameter :28mm ，Width :8mm ，Bore Diameter :12mm ，Size :12x28x8mm ，Brand:KOYO |
| 7312 A Angular contact ball bearings | Width :31mm ，Brand:NSK ，Outer Diameter :130mm ，Size :60x130x31mm ，d:60 mm ，Bore Diameter :60mm |
| 6203NREE Deep groove ball bearings | Brand:SNR ，Size :17x40x12mm ，Bore Diameter :17.000mm ，Width :12.000mm ，Outer Diameter :40.000mm ，d:17.000 mm |
| RCJ2-15/16 Bearing units | U:86.792 mm ，Thread (Q):1/8 NPT ，Bore Diameter :74.613mm ，d:74.613 mm ，V:170.002 mm ，Brand:INA |
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