Page 201 - SKF-bearing-housings

Sealing solutions

Table 1
Standard seals for large SNL plummer block housings

5
Seal
Type Labyrinth Taconite Oil End cover
Designation TS .. TNF .. TSD .. U 1) ETS ..
Material steel, silicone steel, nitrile rubber steel,silicone steel, silicone
Seals per pack 1 seal 1 seal 1 seal 1 end cover

Application conditions and requirements
Temperature [°C] –50 to +200 –40 to +100 –50 to +200 –50 to +200
Temperature [°F] –60 to +390 –40 to +210 –60 to +390 –60 to +390
Max. circumferential speed [m/s] not limited 12 not limited n/a
Max. misalignment [°] ≤ 0,3° ≤ 0,3° ≤ 0,3° n/a
Low friction ++ + ++ n/a
Axial shaft displacement + + + n/a
Vertical shaft arrangement –– – –– ++
Grease relubrication + + n/a ++
Oil lubrication –– – ++ n/a
Replacement – – – ++
Shaft tolerance class h9V E h9V E h9V E n/a
Shaft roughness R a [µm] 3,2 3,2 3,2 n/a
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) The designation is valid for ordering spare parts. The oil seals are supplied together with the housing.

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