Page 165 - SKF-bearing-housings

Sealing solutions

V-ring seals 1° for larger shafts. The axial movement of the
V-ring seals consist of a V-ring and a sheet shaft relative to the housing is limited to
steel sealing washer with a vulcanized rubber ±1,5 mm.
lip. The rubber lip fits into the seal groove in For arrangements with a vertical shaft, the
the housing. The washer is protected against V-ring of the lower seal should be mounted
corrosion. inside the housing.
V-rings can accommodate circumferential 4
speeds up to 7 m/s. For circumferential speeds
between 7 and 12 m/s, they should be located
axially on the shaft. At speeds above 12 m/s, a
support ring must be used to prevent the seal
from lifting. Recommended dimensions for
appropriate support rings for axial and radial
location are provided in table 3.
The permissible angular misalignment for
seals mounted on shafts < 150 mm in diam-
eter is approximately 1,5° and approximately
Table 3
Recommended dimensions for support rings for V-ring seals

5

120°
d 1 D d 2

1 0 B 2
B 1
7 to 12 m/s >12 m/s

Shaft Dimensions Grub screw V-ring seal
diameter to DIN 913 Standard Alternative
1) D designation designation
d a d b d 1 d 2 B 1 B 2
mm mm – –
110 110 122,9 17,5 7,5 128 M6 ¥ 8 110 VA R CR 401100
115 115 127,4 17,5 7,5 133 M6 ¥ 8 110 VA R CR 401100
125 125 138,1 17,5 7,5 143 M6 ¥ 8 130 VA R CR 401300
135 135 147,5 17,5 7,5 153 M6 ¥ 8 130 VA R CR 401300
140 140 152,9 17,5 7,5 158 M6 ¥ 8 140 VA R CR 401400
145 145 158,1 17,5 7,5 163 M6 ¥ 8 150 VA R CR 401500
155 155 167,5 18,5 8,5 173 M6 ¥ 8 150 VA R CR 401500
165 165 179,9 18,5 8,5 185,5 M6 ¥ 8 170 VA R CR 401700
175 175 189,3 18,5 8,5 195 M6 ¥ 8 170 VA R CR 401700

1) d a : shaft diameter for bearings on an adapter sleeve
d b : shaft diameter for bearings on a stepped shaft

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