| US stock number | 21640 | |||
| Design | CRW1 | |||
| Lip material | R | |||

| d1 | 55 | mm | |
| D | 80 | mm | |
| b | 8 | mm |
| Pressure differential | max. | 0.07 | MPa | |
| Operating temperature | min. | -40 | °C | |
| Operating temperature | max. | 100 | °C | |
| Operating temperature, short period | max. | 120 | °C | |
| Rotational speed | max. | 6250 | r/min | |
| Shaft surface speed | max. | 18 | m/s |
| Model No. | Inner Diameter | Outer Diameter | Width | Type |
| KMFE 13 | ||||
|---|---|---|---|---|
| LM 29749/711 | ||||
| NK 43/20 | ||||
| NKI 7/12 TN | ||||
| NU 2264 ECMA |
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