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Criteria for seal and material selection
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The selection of the right seal profile and Type of movement Recommended usage Optional usage
material for a given application requires con- table head (blue symbol) depending on the application
sideration of many factors and strongly de- parameters (grey symbol)
pends on the operating conditions of the
application . Linear
Furthermore, a sealing system may con-
tain many components . Rotating
This catalogue supports the selection of Oscillating or swivelling
the right machined seals including the ap-
propriate sealing material for typical rotary, Spiral
linear and static applications . Static
Generally spoken, the following applica-
tion considerations are required to properly
select seal profiles and sealing materials: In case you need to use a seal profile with a listed grey symbol, please contact SKF to clarify the
application limitations.
• Type of movement; linear, rotating, swivel-
ling, spiral movement or static application
• Type of application General remarks for technical Application symbols
• Temperature range (fluid, housing, envi- data The application symbols listed with each and
ronment); all in operation and at rest The stated operating parameters in the fol- every seals profile in the following tables
• Speed; either the stroking speed for linear lowing tables represent general conditions . It show the usability of the specific seals profile
applications or the circumferential and ro- is recommended NOT to use all maximum for the main types of movement – linear, ro-
tational speed for rotating or swivelling values simultaneously . The specified pres- tating, oscillating or swivelling, spiral or
applications sure limits apply for use in mineral oil with a static .
• Pressure range of the fluid to be sealed; maximum temperature of 60 °C and a maxi- The symbols are shown in two different
that might be the absolute pressure as mum metal extrusion gap of 0,25 mm un- colours – blue for recommended use and
well as pressure spikes or pressure differ- less stated differently for selected seal pro- grey for optional use . Please refer to the ta-
entials that the seals need to cope with files . The speed limits apply for adequate ble for more details . If a specific symbol is
• Fluid media; the type and viscosity of the lubrication and running surface finishing as NOT listed at a selected seals profile, we
fluid used in the system recommended . SKF also recommends test- strongly recommend not using it for such an
• Hardware dimensions; rod and bore resp . ing material/media compatibility and sealing application .
shaft and housing diameters, seal groove function for targeted performance under
dimensions and gaps (if already specified), real working conditions . Depending on ap-
installation restrictions, limited space, etc . plication details, higher pressures and speed Scan to view video, about the machining
• Surface specifications; material, hardness limits can be attained in most cases . If any of process via a QR code
surface finish and tolerances of all surfac- the indicated limits do not meet specific re-
es that are in contact with the seals quirements, please contact SKF .
• Environmental aspects like contaminants,
external temperature etc .

Please also find more details in the respec-
tive introductory section to the different seal
categories . There you also will find selection Scan to explore our Industrial Seals
guides based on the above mentioned Expert Knowledge Hub
criteria .

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