| US stock number | 20044 | |||
| Design | HM21 | |||
| Lip material | R | |||
SKF Bore Tite Coating

| d1 | 50.8 | mm | |
| D | 77.75 | mm | |
| b | 6.35 | 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. | 3760 | r/min | |
| Shaft surface speed | max. | 10 | m/s |
| Model No. | Inner Diameter | Outer Diameter | Width | Type |
| 31870 | 80.9752 | 117.5 | 11.13 | Seals |
|---|---|---|---|---|
| 38x50x7 CRW1 R | 38 | 50 | 7 | Seals |
| 6305-2Z | 25 | 62 | 17 | Bearings, units and housings |
| 6314/HC5C3 | 70 | 150 | 35 | Bearings, units and housings |
| 7003 ACE/P4A | 17 | 35 | 10 | Bearings, units and housings |
| 7740 | 19.99 | 28.55 | 4.78 | Seals |
| BT4B 331347 AG/HA1 | 406.4 | 565.15 | - | Bearings, units and housings |
| IR 95x105x36 | 95 | 105 | 36 | Bearings, units and housings |
| KD21-254 | 26 | 194 | - | Coupling systems |
| NKI 9/12 | 9 | 19 | 12 | Bearings, units and housings |
| OKTC 690 | - | 995 | - | |
| PSM 253220 A51 | 25 | 32 | 20 | Bearings, units and housings |
Hot number:
135x170x12 HMSA10 RG
12531
27x47x10 HMS5 V
46x65x10 HMS5 RG
4933
6205-2Z
71832 CD/HCP4
FSAF 22516
H 317 E
HE 3130
N 1014 KTNHA/HC5SP
NJ 2226 ECML
NJ 313 ECML
RNU 212 ECP
S71908 ACB/P4A
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