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Slewing ring bearings: types, dimensions & brand filters

Large ring bearings support combined loads and moments, often with mounting holes or gearing.

On this page6 sections

Structure · function · identification

What is this bearing type?

A slewing ring is a large ring-bearing arrangement used for rotation or oscillation with combined loads and tilting moments. Many applications turn slowly or intermittently, so static load conditions are especially important.

Part or design	What it does	What to verify
Bearing rings	Usually connect directly to adjacent structures with screws.	The bolt pattern and support structure are part of the selection.
Rolling-element arrangement	May use balls or rollers.	Read the exact construction and load diagrams.
Gear, if provided	May be on an inner or outer ring.	Check gear location and geometry separately from bearing diameter.

On a small screen, scroll the table horizontally to read all three columns.

Variants that change the answer

Geared and ungeared rings, large industrial supports and precision small-ring applications do not share one universal design limit. Axial load, radial load and tilting moment must remain separate inputs.

What the family name cannot tell you

A matching outside diameter does not verify load capacity, bolt compatibility or mounting stiffness. Do not substitute a catalogue dynamic rating for the required static and moment checks.

Identify the exact part before comparing

Record the ring designation, gear details and mounting-hole drawing.
Identify stationary, oscillating and rotating load cases.
Compare the complete load/moment envelope and support requirements before selecting candidates.

Inspect real catalogue records below →Crossed roller structures →Application conditions →Drawing lookup →

Technical reference basis: Schaeffler medias: Slewing Rings. Explanation and lookup workflow: BearingScope. Manufacturer-specific limits remain attached to the exact product record.

Application starting points

Where this family is used

Rotating platforms and slow heavy-duty pivots.

Read equipment selection guides →

Do not skip

Selection and interchange checks

Compare load diagrams, bolt pattern, ring rigidity and gear details; diameter alone cannot select a replacement.

Full verification checklist →

Database-backed results

Slewing ring bearings — actual products

1,594 records

First 12 records. Open all results to filter brands and technical attributes. These are search candidates, not approved replacements.

Brand / complete designation	Type	d×D×B (mm)	Closure	Original precision	Clearance
SKF305943	Four-point contact ball bearing	40×80×18	Without	Not reported	Not reported
INACSXA020	Four-point contact bearing	50.8×63.5×6.35	Not reported	Not reported	Not reported
INACSXA025	Four-point contact bearing	63.5×76.2×6.35	Not reported	Not reported	Not reported
INACSXA030	Four-point contact bearing	76.2×88.9×6.35	Not reported	Not reported	Not reported
INACSXA035	Four-point contact bearing	88.9×101.6×6.35	Not reported	Not reported	Not reported
INACSXA040	Four-point contact bearing	101.6×114.3×6.35	Not reported	Not reported	Not reported
INACSXA045	Four-point contact bearing	114.3×127×6.35	Not reported	Not reported	Not reported
INACSXA047	Four-point contact bearing	120.65×133.35×6.35	Not reported	Not reported	Not reported
INACSXA050	Four-point contact bearing	127×139.7×6.35	Not reported	Not reported	Not reported
INACSXA055	Four-point contact bearing	139.7×152.4×6.35	Not reported	Not reported	Not reported
INACSXA060	Four-point contact bearing	152.4×165.1×6.35	Not reported	Not reported	Not reported
INACSXA065	Four-point contact bearing	165.1×177.8×6.35	Not reported	Not reported	Not reported

— = not recorded. Width conventions differ for tapered assemblies, thrust bearings and mounted units. Always inspect the dimensional drawing.

Filter all 1,594 records →

All recorded subtypes in this family

Original catalogue descriptions are preserved in the records. Identical display names, including singular/plural variants, share one combined entry. Selecting a subtype opens its brand and technical filters.

Find a subtype

Four point contact ball bearing68 Four-point contact ball bearing54 Four-point contact ball bearing with locating slots112 Four-point contact bearing353 Reali-slim thin section four-point contact ball bearing545 Reali-slim thin section four-point contact ball bearing with seals or shields183 Rk series four-point contact, flanged slewing ring bearing with external gear and seals1 Rk series four-point contact, flanged slewing ring bearing with internal gear and seals1 Rk series four-point contact, flanged slewing ring bearing with seals1 Slewing ring6 Slewing ring, 4 point contact bearing, external gear teeth75 Slewing ring, 4 point contact bearing, internal gear teeth53 Slewing ring, 4 point contact bearing, without gear teeth112 Special four-point contact ball bearing with integral sealing16 Ultra-slim thin section four-point contact ball bearing14

Reference basis & data limits

Manufacturer terminology is retained in the product records. Technical reference basis: JTEKT Basic Bearing Knowledge (boundary dimensions, tolerance classes and lubrication); NSK Bearing ABCs (lubrication, designations and clearance); NTN technical FAQs (closure codes and component interchange); SKF rolling-bearing selection and maintenance references.

Selection workflows and catalogue grouping are BearingScope editorial aids. Verify the current drawing and application requirements before using a candidate. Missing database information is not converted into an assumed match.