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
Sheaves
Resolve rope forces, wrap angle, side loading and actual bearing spacing.
Hook swivels
Identify thrust support, rotation and the complete retained assembly required by the lifting equipment.
Slewing supports
Use axial/radial/moment load combinations, bolt loading, mounting flatness and gear interface requirements.
Which bearing structures make sense?
Sheave rolling bearings
Select within the engineered sheave assembly.
Check first: Check static peaks, oscillation and shaft deflection, not only continuous-rotation life.
Thrust and slewing assemblies
Use the approved lifting-component design.
Check first: A catalogue thrust bearing or ring is not a certified hook or crane assembly.
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 the sheave, hook or slew location and approved component specification.
- Obtain the lifting duty, peak forces and support geometry.
- Verify the bearing, retention, structure, fasteners and lubrication as an assembly.
- Follow the equipment's competent-person inspection and release-to-service process.
Symptoms worth checking
Uneven slewing resistance
Inspect ring support, fasteners, gearing and lubrication through the equipment procedure.
Sheave misalignment or rope tracking change
Check shafts, spacers and supporting structure rather than changing bearing type alone.
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 generic 51105 be used as a crane hook bearing?
A dimension match is not lifting approval. Hook loads, retention and the certified assembly specification govern.
Why is no general-purpose model recommended?
The database does not establish a verified fit for a lifting assembly. Listing ordinary bearings here as approved lifting parts would be misleading.
Does this also apply to boat lifts and scissor lifts?
Yes, identify the approved roller, sheave, pin or pivot assembly and its load path first. A plain pivot bushing and a rotating sheave bearing perform different functions. Use the lift manufacturer's component specification and inspection procedure.
Reference basis & recommendation limits
- NSK — Quarrying, Mining and Construction
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.