12580/12520 NACHI Width 19.845mm 20.638×49.225×19.845mm Tapered roller bearings
| Bearing number | 12580/12520 |
| Size (mm) | 20.638×49.225×19.845 |
| Brand | NACHI |
| Bore Diameter (mm) | 20.638 |
| Outer Diameter (mm) | 49.225 |
| Width (mm) | 19.845 |
| d | 20.638 mm |
| D | 49.225 mm |
| T | 19.845 mm |
| B | 19.845 mm |
| C | 15.875 mm |
| a | 7.1 mm |
| r1 min. | 1.5 mm |
| r2 min. | 1.5 mm |
| Weight | 0.181 Kg |
| Basic dynamic load rating (C) | 36000 kN |
| Basic static load rating (C0) | 37000 kN |
| (Grease) Lubrication Speed | 8000 r/min |
| (Oil) Lubrication Speed | 11000 r/min |
| Calculation factor (e) | 0.32 |
| Calculation factor (Y0) | 1.0 |
Detailed Parameters
parameter：
| UCFL216 Bearing units | Bore Diameter :80mm ，Brand:NACHI ，d1:80 mm ，A0:83.3 mm |
| GE 16 DO Plain bearings | Size :16x30x14mm ，Brand:INA ，Bore Diameter :16mm ，Outer Diameter :30mm |
| NA6903TT Needle roller bearings | Outer Diameter :30mm ，Size :17x30x24mm ，Width :24mm ，Brand:NSK ，Bore Diameter :17mm ，d:17 mm |
| K18X24X12 Needle roller bearings | Bore Diameter :18mm ，Outer Diameter :24mm ，Fw:18 mm ，Brand:INA |
| RASEY70 Bearing units | Brand:INA ，Bore Diameter :70mm ，S1:44.4 mm ，Thread (Q):Rp1/8 ，d:70 mm |
| N228 Cylindrical roller bearings | Bore Diameter :140mm ，Size :140x250x42mm ，Brand:KOYO ，Outer Diameter :250mm |
| TUP1 160.115 Plain bearings | Bore Diameter :160mm ，D:165 mm ，Brand:CX ，f1:1.6 mm ，d:160 mm ，Outer Diameter :165mm |
| UKP317SC Bearing units | d:75 mm ，Brand:KOYO ，Bore Diameter :75mm ，Width :112mm |
| 8303 Wheel bearings | Designation SNR:R183.03 ，Brand:Ruville ，Designation SKF:VKBA 3472 ，Designation FAG:713697040 |
| 5203-2NS Angular contact ball bearings | Width :17.5mm ，Bore Diameter :17mm ，Size :17x40x17.5mm ，Outer Diameter :40mm ，Brand:NACHI |
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