61902-2RS bearing: complete specifications & equivalents
The 61902-2RS is a ISO 15 radial bearing sized 15 x 28 x 7 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 | 15 mm |
| Outer diameter D | 28 mm |
| Width B | 7 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 | 4.36 kN |
| Basic static load rating C0 | 2.24 kN |
| Fatigue load limit Pu | 0.095 kN |
| Limiting speed (mechanical) | 16000 rpm |
| Operating temperature | -30 to +110 °C |
| Mass | 16 g |
| Manufacturer designation | SKF 61902-2RS1 |
| 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 | 0.591 in |
|---|---|
| Outer diameter D | 1.102 in |
| Width B | 0.276 in |
| ISO bore code | 02 |
| Radial section height (D−d)/2 | 6.5 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) | 10 of 63 |
| Bore above smallest 61900-series size | 12 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61902-2RS-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. |
| 61902-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant differs (2RS vs OPEN) — confirm sealing suits the duty. |
| 61902-ZZ-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant differs (2RS vs ZZ) — confirm sealing suits the duty. |
| 61902 | ISO 15 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting. |
| 61902-2RS-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. |
| 61902-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant differs (2RS vs OPEN) — confirm sealing suits the duty. |
| 61902-RSR-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant differs (2RS vs RSR) — confirm sealing suits the duty. |
| 61902-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant differs (2RS vs ZZ) — confirm sealing suits the duty. |
| 61902-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61902-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant (2RS vs OPEN) and load ratings differ — confirm sealing and rating before substituting. |
| 61902-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant (2RS vs RSR) and load ratings differ — confirm sealing and rating before substituting. |
| 61902-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 15×28×7 mm envelope per ISO 15; seal variant (2RS vs ZZ) and load ratings differ — confirm sealing and rating before substituting. |
| W61902-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 61902-2RS1 shares the 15×28×7 mm envelope but rates differently (4.36/2.24 kN vs 3.71/2.24 kN) — not a load-rating equivalent. |
| W61902-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 61902-2Z shares the 15×28×7 mm envelope but rates differently (4.36/2.24 kN vs 3.71/2.24 kN) — not a load-rating equivalent. |
| W61902 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 61902 shares the 15×28×7 mm envelope but rates differently (4.36/2.24 kN vs 3.71/2.24 kN) — not a load-rating equivalent. |
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 61902-2RS model number is decoded
61902-2RS 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), its bore code 02 comes from the 10/12/15/17 mm exception table, giving a 15 mm bore; the 28 mm outside diameter and 7 mm width follow the same boundary-dimension plan. For a rotating inner ring on a 15 mm shaft under normal load, catalogue practice seats it on a j5 shaft fit with an H7 housing bore — confirm against the actual load direction and magnitude before committing. SKF's contact-seal catalogue number is 61902-2RS1 (older text: -2RS1), mapped here from the industry-neutral -2RS spelling.
Typical equipment & failure modes
Common applications
- space-constrained gearboxes
- clutch and transmission assemblies
- robotics and automation joints
- lay shafts and idler shafts
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)
- 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
- Miniature bearings like 61902-2RS (15 mm bore) brinell under surprisingly small pressing force; use a fitting sleeve on the ring being mounted and never let the assembly load cross the balls.
- The 619xx thin section at 15 mm bore (6.5 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: 61902-2RS runs slower and cooler-limited than the open 61902; 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 61902-2RS in solvent or press it home via the outer ring; solvent destroys the grease thickener and mounting force through the seal deforms the lip.
- Measure the shaft, do not trust the drawing: a 15 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 61902-2RS.
- Grease compatibility is not guaranteed between fills: mixing lithium and polyurea thickeners in a 61900-series position can soften the mixture and leak — clean out the old fill before switching grease types.
- SKF catalogues the contact-sealed version as 61902-2RS1 (older printings may read -2RS1); it is shipped pre-greased and its 16000 r/min limiting speed is set by seal-lip drag and grease life versus the open bearing's 56000 r/min thermal reference speed.
- The 4.36/2.24 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 61902-2RS bearing?
A 61902-2RS deep-groove ball bearing has a 15 mm bore, 28 mm outer diameter and 7 mm width (0.591 × 1.102 × 0.276 in), per ISO 15 boundary dimensions. It is fitted with two contact rubber seals and is normally pre-greased.
What internal clearance does 61902-2RS have?
Unless a clearance suffix says otherwise, 61902-2RS 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 61902 and verify the residual clearance after mounting.
How should 61902-2RS be mounted?
Apply the mounting force to the ring being fitted: on a 15 mm shaft seat the press load must pass through the inner-ring face only. A fitting sleeve and an arbor press are normally sufficient at this size. Never strike the outer ring, the cage or the seals.
What lubrication does 61902-2RS need?
61902-2RS is supplied pre-greased for life and is not designed to be opened for relubrication; where a relubrication path is required, specify the open 61902 with a housing grease fitting instead.
What is the SKF designation and catalogue data for 61902-2RS?
In the SKF Rolling Bearings catalogue this size is listed as 61902-2RS1 — two contact elastomer seals over a lifetime grease fill, 15×28×7 mm per ISO 15. Quoted values: C 4.36 kN, C0 2.24 kN, Pu 0.095 kN, limiting speed 16000 r/min, mass 16 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61902-2RS.
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.