61952 bearing: complete specifications & equivalents
The 61952 is a ISO 15 radial bearing sized 260 x 360 x 46 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 260 mm |
| Outer diameter D | 360 mm |
| Width B | 46 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 212 kN |
| Basic static load rating C0 | 270 kN |
| Fatigue load limit Pu | 6.55 kN |
| Reference speed (thermal) | 3600 rpm |
| Limiting speed (mechanical) | 2200 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 12000 g |
| Manufacturer designation | SKF 61952 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-24 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-24
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 61900-series range
| Bore d | 10.236 in |
|---|---|
| Outer diameter D | 14.173 in |
| Width B | 1.811 in |
| ISO bore code | 52 |
| Radial section height (D−d)/2 | 50 mm |
| Smallest bore in 61900-series | 3 mm |
| Largest outer diameter in 61900-series | 1120 mm |
| Width range across 61900-series | 3–118 mm |
| Bore position in 61900-series (smallest first) | 42 of 63 |
| Bore above smallest 61900-series size | 257 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61952 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
| 61952-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 260×360×46 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61952-MA | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 61952 MA (machined brass cage, open arrangement) is the same-size execution on the 260×360×46 mm envelope with ratings within 10 % — boundary dimensions interchangeable. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 61952 model number is decoded
In the 61900-series (diameter series 9 of ISO 15) the last two digits encode the bore: 61952 carries bore code 52 = 260 mm. Outside diameter 360 mm and width 46 mm come from the ISO 15 boundary-dimensions general plan. With no seal suffix the bearing is open: no shields or seals are fitted and lubrication is supplied by the application. For normal-load mounting with a rotating inner ring on a 260 mm shaft, typical catalogue practice is a m6 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. In the SKF catalogue this open execution carries the bare designation; protected variants are ordered separately as -2Z and -2RSH.
Typical equipment & failure modes
Common applications
- textile machinery
- packaging machinery
- space-constrained gearboxes
- clutch and transmission assemblies
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- cage damage from operation beyond the limiting speed
- electrical pitting in VFD-driven motors without grounding protection
Selection pitfalls — read before you substitute
- At 260 mm bore the ring mass is significant: heat 61952 on an induction heater (max 120 °C), never over an open flame, and plan puller access or a withdrawal sleeve now for the day it has to come off again.
- The 619xx thin section at 260 mm bore (50.0 mm section height) cannot shrug off the misalignment a standard section tolerates; keep the housing bores round and aligned, or edge contact will spall the raceways early.
- Storage matters for open bearings: 61952 leaves the factory with rust preventive only, so clean it and apply the service grease at assembly even if the rings look oily from the wrapper.
- Open bearings tolerate the highest speeds in the 61900-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 61952 units.
- Axial location must clamp the ring face, not the seal area: a shoulder or circlip bearing on the seal side of the 46 mm-wide ring of 61952 drags the lip and overheats it.
- The housing bore for the 360 mm OD should be round within IT7; an oval bore pinches the outer ring of 61952 and shows up later as two-point loaded raceway wear.
- The open 61952 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 61952-2Z (shields) and 61952-2RSH (contact seals), not suffix-free 61952.
- The 212/270 kN ratings here are SKF Explorer-class figures from catalogue PUB BU/P1 17000/1 EN (Oct 2018); SKF can revise internal geometry and ratings without changing the designation, so treat the catalogue version and date as part of the specification and re-verify for critical drives.
Frequently asked questions
What are the dimensions of a 61952 bearing?
A 61952 deep-groove ball bearing has a 260 mm bore, 360 mm outer diameter and 46 mm width (10.236 × 14.173 × 1.811 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
What lubrication does 61952 need?
The open 61952 is lubricated by the application; a NLGI 2 lithium-soap grease filled to roughly 25–35% of the free volume is the common choice, with a defined relubrication interval.
How does the 61952 bore code work?
The last two digits of 61952 are bore code 52, giving 52 × 5 = 260 mm bore. The 360 mm outside diameter and 46 mm width follow the ISO 15 diameter series, not the bore code alone.
What does no suffix on 61952 mean?
A bare 61952 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication.
What is the SKF designation and catalogue data for 61952?
In the SKF Rolling Bearings catalogue this size is listed as 61952 — the open (unsealed) execution, 260×360×46 mm per ISO 15. Quoted values: C 212 kN, C0 270 kN, Pu 6.55 kN, limiting speed 2200 r/min, mass 12000 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61952.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-24. Read our editorial & correction policy.