Keep the evidence with the model shortlist
The models on this page illustrate bearing roles; they are not confirmed replacements for an unspecified machine. Keep the original complete marking, machine position, load and speed duty, temperature, lubricant and mounting arrangement together. Check the candidate's recorded values below and leave unreported parameters unknown.
Check drawings and model records · Investigate a failure before replacing it · Plan installation and force paths
What matters in this application
Pressure and temperature
Specify operating pressure, bake-out cycle, temperature and permitted gas release.
Cleanliness
Define allowable particles and contamination sensitivity at the actual mechanism.
Process compatibility
Identify gases, cleaning agents, lubricant restrictions and material exposure.
Which bearing structures make sense?
Vacuum-specific rolling bearings
Investigate bearings engineered for the specified pressure and cleanliness.
Check first: Standard grease and ordinary seals cannot be assumed suitable.
Special lubrication or non-contact support
Evaluate the appropriate solid-lubricant, gas or magnetic architecture.
Check first: Use the exact process requirements and system design; these architectures are not drop-in equivalents.
Model selection & data availability
Use the selection requirements below to identify the exact specification. A general-purpose bearing is not presented as a substitute for an unverified specialist design.
Search an existing designation →Work through the selection
- Separate process-exposed supports from external motors and pumps.
- Write the pressure, cleanliness, chemistry and thermal requirements.
- Select qualified bearing/material/lubricant systems and verify outgassing data.
- Validate the assembled mechanism under the intended process conditions.
Symptoms worth checking
Pressure recovery worsens
Investigate contamination and outgassing sources throughout the mechanism.
Particle generation rises
Review wear, lubrication and material compatibility before changing dimensions.
Symptoms are investigation prompts, not a diagnosis. Isolate equipment safely and follow its maintenance procedures before inspection.
Have the original designation?
Look up the complete model and suffix before comparing potential alternatives.
Application questions, answered
Can a standard sealed bearing be used in vacuum?
Not without checking the exact lubricant, seals, materials, pressure and temperature. The seal suffix is not a vacuum rating.
Does the database prove vacuum qualification?
No verified vacuum-specific shortlist is presented here. Use the requirements to assess an explicitly qualified product.
Reference basis & recommendation limits
- NSK — SPACEA bearings for special environments
Application principles are informed by the listed technical references. Model shortlists are BearingScope editorial selections from its database, not manufacturer endorsements or equipment-fit approvals. Confirm the latest exact specification and the complete equipment design before use.