| Domestic and foreign models | |||
| New domestic models | 1221M | ||
| Domestic old models | 1221H | ||
| Main dimensions | |||
| Bore size（d） | 105 | mm | |
| External diameter（D） | 190 | mm | |
| Thickness（B） | 36 | mm | |
| Basic rated load | |||
| Live load（Cr） | KN | ||
| Static load（Cor） | KN | ||
| Ultimate speed | |||
| Grease | rpm | ||
| Oil lubrication | rpm | ||
| Weight | |||
| Weight | 4.71 | kg | |
| Bearing type | |||
| Type | Deep Groove Ball Bearing | ||
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Shandong Ruidefu Transmission Equipment Co., Ltd.