Industrial shaft seals

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Designation system
Metric radial shaft seals
The designations of all metric radial shaft seals
from SKF are prefixed by the letter CR,
followed by the size in millimeters (uncoded)
and the suffixes for the type and design of the
seal and the material of the lip, see page 97.
Inch-size radial shaft seals
Inch-size SKF radial shaft seals are identified
by their drawing number which consists of
from four to seven figures. The drawing
number gives an indication of seal size, but not
of type or material.
Four-figure numbers are used for radial shaft
seals for
shaft diameters ≤ 1 in, e.g.
CR 3680: d1 = 0,375 in
Five-figure numbers are used for radial shaft
seals for
shaft diameters ≥ 1 ≤ 10 in, e.g.
CR 41287: d1 = 4,125 in
CR 97545: d1 = 9,750 in
Six and seven-figure numbers are used for
radial shaft seals for
shaft diameters ≥ 10 in, e.g.
CR 120061: d1 = 12 in
CR 1375242: d1 = 13,75 in
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