Page 166 - SKF-bearing-housings

Split plummer block housings SNLN 30 series

Standard seals for SNLN 30 plummer block housings

Seal
Type Four-lip V-ring Felt
split split
Designation TSN .. L TSN .. A TSN .. C
Size range for adapter sleeve mounting 3024 to 3032 3024 to 3032 3024 to 3032
Size range for cylindrical seat mounting 224 to 230 224 to 232 n/a
Material thermoplastic nitrile rubber, felt, nitrile rubber,
polyester elastomer steel aluminium
Seals per pack 2 seals 2 seals 2 seals

Application conditions and requirements
Temperature [°C] –40 to +100 –40 to +100 –40 to +100
Temperature [°F] –40 to +210 –40 to +210 –40 to +210
Max. circumferential speed 1) [m/s] 13 7 2) 4
Max. misalignment [°] 0,5 1 to 1,5 0,5
Low friction ++ ++ –
Axial shaft displacement ++ – ++
Vertical shaft arrangement + ++ 3) ––
Replacement ++ – +
Shaft tolerance class h9 V E n/a h9 V E
Shaft roughness R a [µm] ≤ 3,2 n/a ≤ 3,2
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) To convert circumferential speeds to rotational speeds, refer to table 7 on page 37.
2) Higher speeds are permissible if the V-ring is located axially on the shaft.
3) When the V-ring of the lower seal is mounted inboard

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