SKF - Industrial Shaft Seals

Radial shaft seals – HDL – inch dimensions
d 1 19.375 – 23.375 in.
b
The table includes only
a selection of available sizes.
Contact your SKF sales
representative for more
information.
d 1
D
Please see pages 74 to 76 for housing bore requirements.
Dimensions
Designations
Shaft Bore Nominal
Lip material
seal width
d 1 D b R V
in./mm –
19.375 21.000 0.750 HDL 3778 R HDL 3778 V
492,13 533,40 19,05
19.500 21.000 0.750 HDL 3779 R HDL 3779 V
495,30 533,40 19,05
21.500 0.875 HDL 4221 R HDL 4221 V
546,10 22,23
19.750 21.750 0.875 HDL 4228 R HDL 4228 V
501,65 552,45 22,23
22.125 0.875 HDL 7400 R HDL 7400 V
561,98 22,23
19.875 22.000 0.875 HDL 3788 R HDL 3788 V
504,83 558,80 22,23
19.937 21.687 0.625 HDL 4233 R HDL 4233 V
506,40 550,84 15,88
21.500 0.750 HDL 3789 R HDL 3789 V
546,10 19,05
20.000 21.500 0.750 HDL 4235 R HDL 4235 V
508,00 546,10 19,05
20.143 22.250 0.875 HDL 3792 R HDL 3792 V
511,63 565,15 22,23
20.250 21.750 0.750 HDL 4239 R HDL 4239 V
514,35 552,45 19,05
22.250 0.875 HDL 4240 R HDL 4240 V
565,15 22,23
20.438 22.500 0.813 HDL 4242 R HDL 4242 V
519,13 571,50 20,65
20.500 22.000 0.750 HDL 4619 R HDL 4619 V
520,70 558,80 19,05
20.625 22.625 0.813 HDL 9893 R HDL 9893 V
523,88 574,68 20,65
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