W639/3-2Z SKF 3x8x4mm Basic dynamic load rating (C) 0.319 kN Deep groove ball bearings
| Bearing number | W639/3-2Z |
| Size (mm) | 3x8x4 |
| Brand | SKF |
| Bore Diameter (mm) | 3 |
| Outer Diameter (mm) | 8 |
| Width (mm) | 4 |
| d | 3 mm |
| D | 8 mm |
| B | 4 mm |
| C | 4 mm |
| d1 | 4.3 mm |
| d2 | – mm |
| r1 min. | 4.2 mm |
| r2 min. | 4.2 mm |
| D1 | 7.3 mm |
| D2 | 0.15 mm |
| da min. | 4.3 mm |
| Da max. | 7.3 mm |
| ra max. | 0.15 mm |
| Weight | 0.00083 Kg |
| Basic dynamic load rating (C) | 0.319 kN |
| Basic static load rating (C0) | 0.09 kN |
| Fatigue load limit (Pu) | 0.004 |
| Reference speed | 150000 r/min |
| Limiting speed | 75000 r/min |
| Calculation factor (f0) | 6.1 |
Detailed Parameters
parameter：
| PCZ 2416 M Plain bearings | Size :38.1x42.069x25.4mm ，Brand:SKF ，Bore Diameter :38.1mm ，Outer Diameter :42.069mm |
| 120RT30 Cylindrical roller bearings | F:130 mm ，d:120 mm ，Brand:Timken ，Outer Diameter :170mm ，Bore Diameter :120mm |
| 5213ANR Angular contact ball bearings | Bore Diameter :65mm ，Width :38.1mm ，Brand:NACHI ，Size :65x120x38.1mm ，Outer Diameter :120mm |
| 9152K Deep groove ball bearings | Width :65mm ，Size :260x400x65mm ，d:260 mm ，Brand:Timken ，Bore Diameter :260mm ，Outer Diameter :400mm |
| LMK6LUU Linear bearings | Outer Diameter :12mm ，d:6 mm ，Brand:Samick ，Bore Diameter :6mm |
| 2310K Self aligning ball bearings | Outer Diameter :110mm ，Size :50x110x40mm ，Brand:NACHI ，Bore Diameter :50mm |
| RN2217-E-MPBX Cylindrical roller bearings | Bore Diameter :85mm ，Brand:FAG ，Size :85x136.5x36mm ，Outer Diameter :136.5mm ，d:85 mm ，Width :36mm |
| 6012LLUNR Deep groove ball bearings | Size :60x95x18mm ，Brand:NTN ，Width :18.000mm ，d:60.000 mm ，Outer Diameter :95.000mm ，Bore Diameter :60.000mm |
| NU1030 Cylindrical roller bearings | Size :150x225x35mm ，Bore Diameter :150mm ，Outer Diameter :225mm ，Brand:KOYO |
| 7038DB Angular contact ball bearings | Brand:NTN ，Outer Diameter :290mm ，Bore Diameter :190mm ，d:190 mm ，Width :46mm ，Size :190x290x46mm |
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