Page 703 - SKF-bearing-housings

Sealing solutions

Table 1
Seals for inch roller bearing units

Seal
Type triple-lip labyrinth radial shaft end plug
(TriGard) seal 1)
Material nitrile rubber, metal nitrile rubber d a < 3 in.: plastic
steel d a ≥ 3 in.: steel
Application conditions and
requirements
Temperature [°F] –5 to 230 2) –5 to 230 2) –5 to 230 2) d a < 3 in.: –5 to 230 2)
d a ≥ 3 in.: –5 to 230 2)
Max. circumferential speed 3) 13 not limited 6 n/a
[m/s]
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 + ++ + ++

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

1) Option only for collar-mount units.
2) Imposed by the grease.
3) To convert circumferential speeds to rotational speeds, refer to table 7 on page 37.
17
699