2304SK NTN (Oil) Lubrication Speed 14 000 r/min 20x52x21mm Self aligning ball bearings
| Bearing number | 2304SK |
| 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
parameter：
| 32956 Tapered roller bearings | Brand:FAG ，Outer Diameter :380mm ，Size :280x380x63.5mm ，Bore Diameter :280mm |
| 7322 BEY Angular contact ball bearings | Width :50mm ，Bore Diameter :240mm ，Outer Diameter :110mm ，Brand:SKF ，Size :240x110x50mm |
| 6412 NR Deep groove ball bearings | Brand:ISB ，Bore Diameter :60mm ，Outer Diameter :150mm ，Size :60x150x35mm |
| 234422B Thrust ball bearings | Size :110x170x72mm ，Outer Diameter :170mm ，Brand:KOYO ，Bore Diameter :110mm |
| XLJ 6 Deep groove ball bearings | Brand:SIGMA ，Size :152.4x203.2x25.4mm ，Outer Diameter :203.2mm ，Bore Diameter :152.4mm |
| 7207 B Angular contact ball bearings | Bore Diameter :35mm ，Width :17mm ，Size :35x72x17mm ，Outer Diameter :72mm ，Brand:ISO |
| 300RT02 Cylindrical roller bearings | F:343 mm ，D:540 mm ，Outer Diameter :497mm ，Bore Diameter :300mm ，Brand:Timken ，d:300 mm |
| NK30/20TN Needle roller bearings | Bore Diameter :30mm ，Size :30x40x20mm ，Brand:SKF ，Outer Diameter :40mm |
| NU409-M1 Cylindrical roller bearings | Width :29mm ，Size :45x120x29mm ，Outer Diameter :120mm ，Bore Diameter :45mm ，d:45 mm ，Brand:FAG |
| RC4936 Cylindrical roller bearings | Outer Diameter :250mm ，Brand:NACHI ，Size :180x250x69mm ，Bore Diameter :180mm ，Width :69mm ，d:180 mm |
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