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
Plain-bearing interface
Record shaft diameter, bearing length, housing fit, grooves and specified running clearance.
Water and materials
Establish water quality, flow, dry-running restrictions and shaft/bearing material compatibility.
Alignment and thrust
Separate propeller thrust support from radial stern-tube support and check shaft alignment.
Which bearing structures make sense?
Water-lubricated plain supports
Use the approved material, clearance and water-supply design.
Check first: A rolling-bearing L10 calculation is not a plain-bearing wear/film validation.
Inboard rolling supports
Assess only for the particular dry or oil-lubricated shaft position.
Check first: The bearing, housing, seals and thrust path must match the propulsion arrangement.
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
- Identify stern tube, rudder, thrust or inboard radial support.
- Measure the complete interface and verify material and lubrication requirements.
- Check alignment and the approved load/clearance method for the support type.
- Follow the marine equipment's inspection and installation requirements.
Symptoms worth checking
Rapid plain-bearing wear
Investigate alignment, abrasives, water supply and shaft condition.
Corrosion at an inboard support
Find the water path and review sealing and material compatibility.
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
Is a cutless bearing a sealed ball bearing?
No. The terms refer to different support constructions and lubrication requirements.
Can diameter alone determine marine replacement fit?
No. Length, grooves, housing fit, materials, clearance, shaft condition and approval requirements are also needed.
Reference basis & recommendation limits
- SKF — Bearing selection process
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.