W639/2-2Z SKF 2x6x3mm d1 3 mm Deep groove ball bearings
| Bearing number | W639/2-2Z |
| Size (mm) | 2x6x3 |
| Brand | SKF |
| Bore Diameter (mm) | 2 |
| Outer Diameter (mm) | 6 |
| Width (mm) | 3 |
| d | 2 mm |
| D | 6 mm |
| B | 3 mm |
| C | 3 mm |
| d1 | 3 mm |
| d2 | – mm |
| r1 min. | 2.9 mm |
| r2 min. | 2.9 mm |
| D1 | 5.4 mm |
| D2 | 0.15 mm |
| da min. | 2.9 mm |
| Da max. | 5.4 mm |
| ra max. | 0.15 mm |
| Weight | 0.00035 Kg |
| Basic dynamic load rating (C) | 0.19 kN |
| Basic static load rating (C0) | 0.051 kN |
| Fatigue load limit (Pu) | 0.002 |
| Reference speed | 180000 r/min |
| Limiting speed | 90000 r/min |
| Calculation factor (f0) | 6 |
Detailed Parameters
parameter：
| UCFS307 Bearing units | Brand:NACHI ，H3:100 mm ，A0:40 mm ，d1:35 mm ，Bore Diameter :35mm |
| IJ123003 Angular contact ball bearings | Brand:ILJIN ，I:65 mm ，F:150 mm ，E:70.1 mm |
| UCP210 Bearing units | Bore Diameter :50mm ，Brand:CRAFT ，d:50 mm ，n:19.0 mm |
| SDE12MG Linear bearings | Brand:KOYO ，Outer Diameter :22mm ，Size :12x22x22.9mm ，Bore Diameter :12mm |
| 2RT24201 Thrust roller bearings | Size :1210x1700x200mm ，Brand:NTN ，Bore Diameter :1210.000mm ，Outer Diameter :1700.000mm |
| KT 202624 Needle roller bearings | Bore Diameter :20mm ，Ew:26 mm ，Fw:20 mm ，Brand:IKO ，Outer Diameter :26mm ，Bc:24 mm |
| 3379/3320 Tapered roller bearings | Width :29.37mm ，Brand:FBJ ，d:34.925 mm ，Bore Diameter :34.925mm ，Outer Diameter :80.167mm ，Size :34.925x80.167x29.37mm |
| NKJ17/20 Needle roller bearings | Outer Diameter :29mm ，Width :20mm ，Size :17x29x20mm ，Brand:KOYO ，d:17 mm ，Bore Diameter :17mm |
| NU2328 Cylindrical roller bearings | Brand:CYSD ，Width :102mm ，Size :140x300x102mm ，Bore Diameter :140mm ，d:140 mm ，Outer Diameter :300mm |
| FW9244 Thrust roller bearings | Brand:FAG ，Width :43mm ，Outer Diameter :76mm ，Size :38x76x43mm ，Bore Diameter :38mm |
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