Page 672 - SKF-bearing-housings

Metric roller bearing units SYNT and FYNT series (SKF ConCentra)

Table 1
Seals for SKF ConCentra roller bearing units

Seal
Type double-lip labyrinth heavy-duty end cover
radial shaft seal
Variant general and high-speed extreme all
relubrication-free environment
Ho using series SYNT SYNT SYNT SYNT and FYNT
FYNT – general
variant only
Material nitrile rubber, steel nitrile rubber, polypropylene
steel steel
Application conditions and
requirements
Temperature [°C] –20 to 110 1) –20 to 110 1) –20 to 110 1) –20 to 110 1)
Temperature [°F] –5 to 230 1) –5 to 230 1) –5 to 230 1) –5 to 230 1)
Max. circumferential speed 2) [m/s] 13 not limited 6 n/a
Max. misalignment [°] 1,5 1,5 1,5 n/a
Low friction + ++ + n/a
Axial shaft displacement ++ – + n/a
Vertical shaft arrangement + + + +
Sealing suitability
Dust ++ – ++ ++
Fine particles ++ – ++ ++
Coarse particles ++ + ++ ++
Chips + ++ ++ ++
Liquids when sprayed + –– ++ ++
Direct sunlight + ++ + ++

Symbol: n/a not applicable
++ very suitable
+ suitable
– limited suitability
–– unsuitable

1) Imposed by the grease.
2) To convert circumferential speeds to rotational speeds, refer to table 7 on page 37.

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