W684AX50Z NTN Da max. 7.8 mm 4x9x4mm Deep groove ball bearings
| Bearing number | W684AX50Z |
| Size (mm) | 4x9x4 |
| Brand | NTN |
| Bore Diameter (mm) | 4 |
| Outer Diameter (mm) | 9 |
| Width (mm) | 4 |
| d | 4 mm |
| D | 9 mm |
| B | 4 mm |
| C | 4 mm |
| r min. | 0.15 mm |
| da min. | 5 mm |
| da max | 5.2 mm |
| Da max. | 7.8 mm |
| ra max. | 0.1 mm |
| Weight | 0.76 Kg |
| Basic dynamic load rating (C) | 0.64 kN |
| Basic static load rating (C0) | 0.224 kN |
| (Grease) Lubrication Speed | 49 000 r/min |
| (Oil) Lubrication Speed | 57 000 r/min |
Detailed Parameters
parameter：
| UCFL 209-28G5PL Bearing units | Static Load Rating (Cor):4.783 ，Brand:AST ，Bore Diameter :44.45mm ，Bearing Type:Thermoplastic housing ，Dynamic Load Rating (Cr):7.670 |
| PFD 20 RM Bearing units | Brand:SKF ，Width :25.5mm ，d:20 mm ，Bore Diameter :20mm ，Da:55 mm |
| 200RF03 Cylindrical roller bearings | Brand:Timken ，D:420 mm ，d:200 mm ，F:241 mm ，Outer Diameter :379mm ，Bore Diameter :200mm |
| GEG160ES Plain bearings | d:160 mm ，Bore Diameter :160mm ，Width :135mm ，Outer Diameter :260mm ，Brand:LS ，Size :160x260x135mm |
| 61912 Deep groove ball bearings | Width :13mm ，Outer Diameter :85mm ，Bore Diameter :60mm ，Size :60x85x13mm ，Brand:CRAFT |
| UCC309 Bearing units | Brand:NACHI ，d:45 mm ，A:38 mm ，Bore Diameter :45mm ，Width :57mm |
| BH-2216 Needle roller bearings | Width :25.4mm ，Outer Diameter :44.45mm ，Size :34.925x44.45x25.4mm ，Fw:34.925 mm ，Bore Diameter :34.925mm ，Brand:Timken |
| 110057X/110100C Tapered roller bearings | Brand:Gamet ，Bore Diameter :57.15mm ，Width :26.75mm ，Outer Diameter :100mm ，Size :57.15x100x26.75mm |
| NA2110 Needle roller bearings | Brand:Timken ，Size :110x145x34mm ，Width :34mm ，Bore Diameter :110mm ，Outer Diameter :145mm |
| 3212-BD-TVH Angular contact ball bearings | Bore Diameter :60mm ，Outer Diameter :110mm ，Size :60x110x36.5mm ，Brand:FAG ，Width :36.5mm |
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