61910-RSR bearing: complete specifications & equivalents
The 61910-RSR is a ISO 15 radial bearing sized 50 x 72 x 12 mm (bore x OD x width) with RSR sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50 mm |
| Outer diameter D | 72 mm |
| Width B | 12 mm |
| Material | GCr15 |
| Seal / shield | RSR |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 14.6 kN |
| Basic static load rating C0 | 11.8 kN |
| Fatigue load limit Pu | 0.5 kN |
| Reference speed (thermal) | 19000 rpm |
| Limiting speed (mechanical) | 9500 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 140 g |
| Manufacturer designation | SKF 61910-2RZ |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-25 |
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 | 1.969 in |
|---|---|
| Outer diameter D | 2.835 in |
| Width B | 0.472 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 11 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) | 18 of 63 |
| Bore above smallest 61900-series size | 47 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61910-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×72×12 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61910-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×72×12 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61910-RSR-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 61910-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×72×12 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| 61910-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×72×12 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61910-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×72×12 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61910-RSR-NTN | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 61910-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×72×12 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
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 61910-RSR model number is decoded
In the 61900-series (diameter series 9 of ISO 15) the last two digits encode the bore: 61910 carries bore code 10 = 50 mm. Outside diameter 72 mm and width 12 mm come from the ISO 15 boundary-dimensions general plan. Suffix -RSR denotes two low-friction non-contact elastomer seals; they keep coarse debris out with minimal drag but are not liquid-tight. For normal-load mounting with a rotating inner ring on a 50 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. SKF's low-friction seal suffix is 2RSL/2RZ (this page's industry-neutral spelling is -RSR); catalogue number 61910-2RZ.
Typical equipment & failure modes
Common applications
- textile machinery
- packaging machinery
- space-constrained gearboxes
- clutch and transmission assemblies
Known failure patterns
- ingress of fine dust or moisture past the non-contact lip in dirty or wet duty (RSR is not liquid-tight)
- lip-lubricant starvation if the bearing runs dry for extended periods
- rolling-contact fatigue spalling after the rated L10 life is exceeded
- brinelling from static overload or hammering during mounting
Selection pitfalls — read before you substitute
- Interference on a 50 mm shaft plus running heat consumes radial clearance: where the shaft runs hot or the fit is tight, order 61910 with C3 clearance and re-check the residual value after mounting.
- The 619xx thin section at 50 mm bore (11.0 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.
- The low-drag lip of 61910-RSR barely touches the inner ring; after long shelf storage the grease can separate, so rotate the rings by hand and confirm smooth, silent running before fitting.
- The non-contact lip of 61910-RSR does not retain a lifetime grease fill the way a contact seal does; confirm the regreasing interval for the 50 mm bore position before relying on it as sealed-for-life.
- The housing bore for the 72 mm OD should be round within IT7; an oval bore pinches the outer ring of 61910-RSR and shows up later as two-point loaded raceway wear.
- Vibration during standstill brinells the raceways of a 50 mm bearing at ball spacing; if the machine sits idle next to running equipment, turn the shaft over periodically or isolate the arrangement.
- SKF catalogues the low-friction seal as 61910-2RZ (suffix -2RSL or -2RZ): a non-contact elastomer lip that runs near the open 9500 r/min limiting speed, closer to the open bearing's 19000 r/min reference than the contact-seal version. It keeps coarse debris out without the drag of a contact seal, but is not liquid-tight — use 2RSH for wet or fine-dust positions.
- The 14.6/11.8 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 61910-RSR bearing?
A 61910-RSR deep-groove ball bearing has a 50 mm bore, 72 mm outer diameter and 12 mm width (1.969 × 2.835 × 0.472 in), per ISO 15 boundary dimensions. It is fitted with two low-friction non-contact rubber seals.
How does the 61900 compare with other series at the same 50 mm bore?
619 is a thin section one step above 618: 72×12 mm with an 11.0 mm radial section at 50 mm bore; a 6210 on the same bore is substantially larger and more heavily rated.
Are 61910 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 61910 uses the same ISO 15 envelope (50×72×12 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting. Seal suffixes also differ by brand (2RS, DDU, LLU, 2RSL and similar).
What internal clearance does 61910-RSR have?
Unless a clearance suffix says otherwise, 61910-RSR is manufactured to normal (CN) radial internal clearance. Tight fits and hot shafts consume clearance in service — for those conditions order the C3 execution of 61910 and verify the residual clearance after mounting.
What is the SKF designation and catalogue data for 61910-RSR?
In the SKF Rolling Bearings catalogue this size is listed as 61910-2RZ — two low-friction non-contact elastomer seals, 50×72×12 mm per ISO 15. Quoted values: C 14.6 kN, C0 11.8 kN, Pu 0.5 kN, limiting speed 9500 r/min, mass 140 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61910-RSR.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-25. Read our editorial & correction policy.