W637/4X-2Z SKF 4x8x3mm Reference speed 150000 r/min Deep groove ball bearings
| Bearing number | W637/4X-2Z |
| Size (mm) | 4x8x3 |
| Brand | SKF |
| Bore Diameter (mm) | 4 |
| Outer Diameter (mm) | 8 |
| Width (mm) | 3 |
| d | 4 mm |
| D | 8 mm |
| B | 3 mm |
| C | 3 mm |
| d1 | 5 mm |
| d2 | – mm |
| r1 min. | 4.8 mm |
| r2 min. | 4.8 mm |
| D1 | 7.4 mm |
| D2 | 0.1 mm |
| da min. | 4.9 mm |
| Da max. | 7.5 mm |
| ra max. | 0.1 mm |
| Weight | 0.0005 Kg |
| Basic dynamic load rating (C) | 0.225 kN |
| Basic static load rating (C0) | 0.072 kN |
| Fatigue load limit (Pu) | 0.003 |
| Reference speed | 150000 r/min |
| Limiting speed | 75000 r/min |
| Calculation factor (f0) | 7.2 |
Detailed Parameters
parameter：
| NUP2318 E Cylindrical roller bearings | Brand:CX ，Width :64mm ，Size :90x190x64mm ，Bore Diameter :90mm ，Outer Diameter :190mm ，d:90 mm |
| UCTL208+WL100 Bearing units | Bore Diameter :40mm ，d:40 mm ，L2:155 mm ，Brand:NACHI ，Width :49.2mm |
| CRO-14209LL Tapered roller bearings | Width :410mm ，Size :711.2x914.4x410mm ，Bore Diameter :711.2mm ，Brand:NTN ，Outer Diameter :914.4mm ，d:711.2 mm |
| 208KDG Deep groove ball bearings | Bore Diameter :40mm ，Size :40x80x18mm ，Brand:Timken ，Outer Diameter :80mm |
| TL22230CDE4 Spherical roller bearings | Size :150x270x73mm ，Bore Diameter :150mm ，Width :73mm ，Outer Diameter :270mm ，Brand:NSK |
| 74537/74851CD+X1S-74537 Tapered roller bearings | Bore Diameter :136.525mm ，Outer Diameter :215.9mm ，Width :106.362mm ，Brand:Timken ，Size :136.525x215.9x106.362mm |
| BSA 212 CG-2RZ Thrust ball bearings | Outer Diameter :110mm ，Bore Diameter :60mm ，Width :22mm ，Brand:SKF ，d:60 mm ，Size :60x110x22mm |
| 22311CKW33 Spherical roller bearings | Outer Diameter :120mm ，Bore Diameter :55mm ，Size :55x120x43mm ，Brand:AST |
| 6206-RZ Deep groove ball bearings | Brand:ISB ，Bore Diameter :30mm ，Outer Diameter :62mm ，Size :30x62x16mm |
| 3307-BD-TVH Angular contact ball bearings | Width :34.9mm ，Size :35x80x34.9mm ，Bore Diameter :35mm ，Brand:FAG ，Outer Diameter :80mm |
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