61907-RSR bearing: complete specifications & equivalents
The 61907-RSR is a ISO 15 radial bearing sized 35 x 55 x 10 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 | 35 mm |
| Outer diameter D | 55 mm |
| Width B | 10 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 | 10.8 kN |
| Basic static load rating C0 | 7.8 kN |
| Fatigue load limit Pu | 0.325 kN |
| Reference speed (thermal) | 26000 rpm |
| Limiting speed (mechanical) | 13000 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 80 g |
| Manufacturer designation | SKF 61907-2RZ |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 2.165 in |
| Width B | 0.394 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 10 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) | 15 of 63 |
| Bore above smallest 61900-series size | 32 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61907-2RS-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61907-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61907-ZZ-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| 61907-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61907-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61907-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. |
| 61907-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| 61907-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant (RSR vs 2RS) and load ratings differ — confirm sealing and rating before substituting. |
| 61907-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant (RSR vs OPEN) and load ratings differ — confirm sealing and rating before substituting. |
| 61907-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61907-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×55×10 mm envelope per ISO 15; seal variant (RSR vs ZZ) and load ratings differ — confirm sealing and rating before substituting. |
| W61907-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 61907-2RS1 shares the 35×55×10 mm envelope but rates differently (10.8/7.8 kN vs 9.36/7.65 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 61907-RSR model number is decoded
In the 61900-series (diameter series 9 of ISO 15) the last two digits encode the bore: 61907 carries bore code 07 = 35 mm. Outside diameter 55 mm and width 10 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 35 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 61907-2RZ.
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
- 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
- electrical pitting in VFD-driven motors without grounding protection
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Sizes around 35 mm bore are normally pressed on cold with a sleeve against the inner-ring face; the press force must never route through the outer ring or the balls of 61907-RSR.
- The 619xx thin section (10.0 mm section height at 35 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 61907-RSR run faster than contact-seal 61907-2RS but let fine dust and moisture past the non-contact lip; in dirty or wet duty specify 61907-2RS instead.
- The low-drag lip of 61907-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 housing bore for the 55 mm OD should be round within IT7; an oval bore pinches the outer ring of 61907-RSR and shows up later as two-point loaded raceway wear.
- Do not quieten a noisy bearing by preloading it: the 61900-series is a deep-groove design, not angular-contact; axial preload raises temperature and shortens grease life.
- SKF catalogues the low-friction seal as 61907-2RZ (suffix -2RSL or -2RZ): a non-contact elastomer lip that runs near the open 13000 r/min limiting speed, closer to the open bearing's 26000 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 10.8/7.8 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 61907-RSR bearing?
A 61907-RSR deep-groove ball bearing has a 35 mm bore, 55 mm outer diameter and 10 mm width (1.378 × 2.165 × 0.394 in), per ISO 15 boundary dimensions. It is fitted with two low-friction non-contact rubber seals.
Are 61907 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 61907 uses the same ISO 15 envelope (35×55×10 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 61907-RSR have?
Unless a clearance suffix says otherwise, 61907-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 61907 and verify the residual clearance after mounting.
How should 61907-RSR be mounted?
Apply the mounting force to the ring being fitted: on a 35 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 is the SKF designation and catalogue data for 61907-RSR?
In the SKF Rolling Bearings catalogue this size is listed as 61907-2RZ — two low-friction non-contact elastomer seals, 35×55×10 mm per ISO 15. Quoted values: C 10.8 kN, C0 7.8 kN, Pu 0.325 kN, limiting speed 13000 r/min, mass 80 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61907-RSR.
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.