61915-2RS bearing: complete specifications & equivalents
The 61915-2RS is a ISO 15 radial bearing sized 75 x 105 x 16 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 75 mm |
| Outer diameter D | 105 mm |
| Width B | 16 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 24.2 kN |
| Basic static load rating C0 | 22.4 kN |
| Fatigue load limit Pu | 0.965 kN |
| Limiting speed (mechanical) | 3600 rpm |
| Operating temperature | -30 to +110 °C |
| Mass | 370 g |
| Manufacturer designation | SKF 61915-2RS1 |
| 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 | 2.953 in |
|---|---|
| Outer diameter D | 4.134 in |
| Width B | 0.63 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 15 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) | 23 of 63 |
| Bore above smallest 61900-series size | 72 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61915-2RS-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. |
| 61915-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×105×16 mm envelope per ISO 15; seal variant differs (2RS vs OPEN) — confirm sealing suits the duty. |
| 61915-RSR-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×105×16 mm envelope per ISO 15; seal variant differs (2RS vs RSR) — confirm sealing suits the duty. |
| 61915-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×105×16 mm envelope per ISO 15; seal variant differs (2RS vs ZZ) — confirm sealing suits the duty. |
| 61915-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×105×16 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61915-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×105×16 mm envelope per ISO 15; seal variant (2RS vs OPEN) and load ratings differ — confirm sealing and rating before substituting. |
| 61915-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×105×16 mm envelope per ISO 15; seal variant (2RS vs RSR) and load ratings differ — confirm sealing and rating before substituting. |
| 61915-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×105×16 mm envelope per ISO 15; seal variant (2RS vs ZZ) and load ratings differ — confirm sealing and rating before substituting. |
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 61915-2RS model number is decoded
61915-2RS is closed by two contacting elastomer lips over a lifetime grease fill; the lips add friction, so the speed ceiling sits below the open execution. Within the thin 619xx section (diameter series 9 of ISO 15), multiplying bore code 15 by five gives the 75 mm bore; the 105 mm outside diameter and 16 mm width follow the same boundary-dimension plan. For a rotating inner ring on a 75 mm shaft under normal load, catalogue practice seats it on a k5 shaft fit with an H7 housing bore — confirm against the actual load direction and magnitude before committing. SKF's contact-seal catalogue number is 61915-2RS1 (older text: -2RS1), mapped here from the industry-neutral -2RS spelling.
Typical equipment & failure modes
Common applications
- clutch and transmission assemblies
- robotics and automation joints
- lay shafts and idler shafts
- textile machinery
Known failure patterns
- seal-lip hardening and loss of pre-grease in sustained high-temperature service
- grease-life expiry in the sealed-for-life cavity (no relubrication path)
- false brinelling from vibration while the shaft is stationary
- fretting corrosion on a loose shaft seat
Selection pitfalls — read before you substitute
- Interference on a 75 mm shaft plus running heat consumes radial clearance: where the shaft runs hot or the fit is tight, order 61915 with C3 clearance and re-check the residual value after mounting.
- The 619xx thin section at 75 mm bore (15.0 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.
- Contact seals add drag and heat: 61915-2RS runs slower and cooler-limited than the open 61915; rubber lips are generally limited to roughly 80–110 °C continuous depending on grease, and C3 clearance is the common hot-duty choice.
- Never wash a sealed 61915-2RS in solvent or press it home via the outer ring; solvent destroys the grease thickener and mounting force through the seal deforms the lip.
- Suffixes stack in a defined order — clearance follows the seal code, e.g. 61915-C3. No clearance suffix means normal CN clearance.
- Deep-groove ball bearings tolerate only minutes of misalignment; if the 105 mm housing cannot be aligned, switch to a self-aligning type rather than shimming 61915-2RS.
- SKF catalogues the contact-sealed version as 61915-2RS1 (older printings may read -2RS1); it is shipped pre-greased and its 3600 r/min limiting speed is set by seal-lip drag and grease life versus the open bearing's 13000 r/min thermal reference speed.
- The 24.2/22.4 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 61915-2RS bearing?
A 61915-2RS deep-groove ball bearing has a 75 mm bore, 105 mm outer diameter and 16 mm width (2.953 × 4.134 × 0.63 in), per ISO 15 boundary dimensions. It is fitted with two contact rubber seals and is normally pre-greased.
What does the 2RS suffix on 61915-2RS mean?
2RS means two contact elastomer seals, one each side, usually over a lifetime grease fill. Sealing against dust and moisture is better than ZZ shields, but the lip drag lowers the speed and temperature ceiling.
How does the 61900 compare with other series at the same 75 mm bore?
619 is a thin section one step above 618: 105×16 mm with a 15.0 mm radial section at 75 mm bore; a 6215 on the same bore is substantially larger and more heavily rated.
Are 61915 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 61915 uses the same ISO 15 envelope (75×105×16 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 is the SKF designation and catalogue data for 61915-2RS?
In the SKF Rolling Bearings catalogue this size is listed as 61915-2RS1 — two contact elastomer seals over a lifetime grease fill, 75×105×16 mm per ISO 15. Quoted values: C 24.2 kN, C0 22.4 kN, Pu 0.965 kN, limiting speed 3600 r/min, mass 370 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61915-2RS.
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.