61911-RSR bearing: complete specifications & equivalents
The 61911-RSR is a ISO 15 radial bearing sized 55 x 80 x 13 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 | 55 mm |
| Outer diameter D | 80 mm |
| Width B | 13 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 | 16.5 kN |
| Basic static load rating C0 | 14 kN |
| Fatigue load limit Pu | 0.6 kN |
| Reference speed (thermal) | 17000 rpm |
| Limiting speed (mechanical) | 8500 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 190 g |
| Manufacturer designation | SKF 61911-2RZ |
| 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 | 2.165 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 0.512 in |
| ISO bore code | 11 |
| Radial section height (D−d)/2 | 12.5 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) | 19 of 63 |
| Bore above smallest 61900-series size | 52 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61911-2RS-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61911-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61911-RSR-FAG | FAG | 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. |
| 61911-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61911-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61911-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. |
| 61911-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| 61911-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61911-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61911-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. |
| 61911-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×80×13 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 61911-RSR model number is decoded
In the 61900-series (diameter series 9 of ISO 15) the last two digits encode the bore: 61911 carries bore code 11 = 55 mm. Outside diameter 80 mm and width 13 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 55 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 61911-2RZ.
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
- fretting corrosion on a loose shaft seat
- cage damage from operation beyond the limiting speed
Selection pitfalls — read before you substitute
- Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 61911 with C3 for those conditions.
- The 619xx thin section (12.5 mm section height at 55 mm bore) trades load capacity for compactness; stiff, accurately aligned seats are essential or edge loading will spall the raceway early.
- RSR low-friction seals on 61911-RSR run faster than contact-seal 61911-2RS but let fine dust and moisture past the non-contact lip; in dirty or wet duty specify 61911-2RS instead.
- The low-drag lip of 61911-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.
- Never mix components between two 61911-RSR units: rings, cage and balls are factory-matched and are not field-interchangeable, even between identical designations.
- Shaft and housing fillets must clear the bearing chamfer so the 13 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius.
- SKF catalogues the low-friction seal as 61911-2RZ (suffix -2RSL or -2RZ): a non-contact elastomer lip that runs near the open 8500 r/min limiting speed, closer to the open bearing's 17000 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 16.5/14 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 61911-RSR bearing?
A 61911-RSR deep-groove ball bearing has a 55 mm bore, 80 mm outer diameter and 13 mm width (2.165 × 3.15 × 0.512 in), per ISO 15 boundary dimensions. It is fitted with two low-friction non-contact rubber seals.
Are 61911 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 61911 uses the same ISO 15 envelope (55×80×13 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 61911-RSR have?
Unless a clearance suffix says otherwise, 61911-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 61911 and verify the residual clearance after mounting.
How should 61911-RSR be mounted?
Apply the mounting force to the ring being fitted: on a 55 mm shaft seat the press load must pass through the inner-ring face only. Induction heating of the inner ring (max 120 °C) is the clean method at this size. Never strike the outer ring, the cage or the seals.
What is the SKF designation and catalogue data for 61911-RSR?
In the SKF Rolling Bearings catalogue this size is listed as 61911-2RZ — two low-friction non-contact elastomer seals, 55×80×13 mm per ISO 15. Quoted values: C 16.5 kN, C0 14 kN, Pu 0.6 kN, limiting speed 8500 r/min, mass 190 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61911-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.