| Domestic and foreign models | |||
| New domestic models | 7021C/DF | ||
| Domestic old models | 336121 | ||
| Main dimensions | |||
| Bore size（d） | 105 | mm | |
| External diameter（D） | 160 | mm | |
| Thickness（B） | 52 | mm | |
| Basic rated load | |||
| Live load（Cr） | 143 | KN | |
| Static load（Cor） | 179 | KN | |
| Ultimate speed | |||
| Grease | 4800 | rpm | |
| Oil lubrication | 6400 | rpm | |
| Weight | |||
| Weight | 3.46 | kg | |
| Bearing type | |||
| Type | Needle bearing | ||
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Shandong Ruidefu Transmission Equipment Co., Ltd.