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
Exposure
State splash, immersion depth, wash pressure, chemicals, salt content and exposure time.
Materials
Check rings, balls, cage, shields, seals and housing against the actual chemicals.
Lubrication and barriers
Verify lubricant compatibility, grease retention, external seals and drainage.
Which bearing structures make sense?
Stainless rolling bearings
Compare actual materials and load ratings with the required environment.
Check first: Stainless can still corrode under unsuitable chemical or chloride exposure.
Special-environment or housed systems
Investigate where ordinary stainless and seals are insufficient.
Check first: Qualification belongs to the whole bearing/seal/housing system.
Recommended starting points
These candidates illustrate specific roles and envelopes, not a ranked list or interchangeable set. Review each condition before using a model in a design.
W 6205
25×52×15 mmStainless deep-groove bearing · open construction
A material and envelope starting point when corrosion resistance is part of the support specification.
- Dynamic C
- 11.7 kN
- Static C₀
- 7.65 kN
- Limiting speed
- 19000 rpm
Before selectionStainless construction references only; neither record alone establishes immersion, pressure-wash or chemical-process approval. Check exact materials, chemicals, lubrication and external sealing. Open construction is not waterproof.
Open complete model dataW 6205-2RS1
25×52×15 mmStainless deep-groove bearing · integral seals
Compare the sealed stainless construction where grease retention and contamination control are needed.
- Dynamic C
- 11.7 kN
- Static C₀
- 7.65 kN
- Limiting speed
- 8500 rpm
Before selectionStainless construction references only; neither record alone establishes immersion, pressure-wash or chemical-process approval. Integral seals do not establish pressure-wash, immersion, hygienic or food-contact approval.
Open complete model dataCompare the recorded specifications
Different sizes and bearing structures are shown for different duties. C and C₀ are catalogue load ratings, not permissible equipment loads. Limiting speed is not an approved operating speed.
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| Parameter | SKFW 6205 | SKFW 6205-2RS1 |
|---|---|---|
| Bore d (mm) | 25 | 25 |
| Outside D (mm) | 52 | 52 |
| Recorded width (mm) | 15 | 15 |
| Dynamic C (kN) | 11.7 | 11.7 |
| Static C₀ (kN) | 7.65 | 7.65 |
| Catalogue limiting speed (rpm) | 19000 | 8500 |
— = not reported, or not directly comparable for a mounted unit. Width conventions differ for inserts, complete units and bearing assemblies; inspect the dimensional drawing. Values are read from the current BearingScope records, not estimated from model numbers.
Work through the selection
- Define the exposure precisely rather than using waterproof as the only requirement.
- Calculate loads and check every material and lubricant in contact with the environment.
- Design external barriers, drainage and inspection access where required.
- Validate corrosion, leakage and operating behavior over the intended duty.
Symptoms worth checking
Rust despite stainless construction
Identify the specific material, chemical concentration and stagnant-liquid conditions.
Water in grease
Trace ingress through the complete housing and shaft-seal system.
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
Are sealed bearings waterproof?
Not as a universal claim. The exact seal and complete assembly must be assessed for splash, jets or immersion.
Can W 6205 replace 6205 without more checks?
Matching dimensions do not guarantee matching ratings, materials, speed, lubrication or application suitability.
Reference basis & recommendation limits
- NSK — SPACEA corrosion-resistant and sanitary bearing families
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.