61815-RSR bearing: complete specifications & equivalents
The 61815-RSR is a ISO 15 radial bearing sized 75 x 95 x 10 mm (bore x OD x width) with RSR sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 75 mm |
| Outer diameter D | 95 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 | 12.5 kN |
| Basic static load rating C0 | 10.8 kN |
| Fatigue load limit Pu | 0.585 kN |
| Reference speed (thermal) | 14000 rpm |
| Limiting speed (mechanical) | 7000 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 150 g |
| Manufacturer designation | SKF 61815-2RZ |
| 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 & 61800-series range
| Bore d | 2.953 in |
|---|---|
| Outer diameter D | 3.74 in |
| Width B | 0.394 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 10 mm |
| Smallest bore in 61800-series | 10 mm |
| Largest outer diameter in 61800-series | 420 mm |
| Width range across 61800-series | 5–38 mm |
| Bore position in 61800-series (smallest first) | 16 of 39 |
| Bore above smallest 61800-series size | 65 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61815-ZZ | GENERIC-ISO | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 75×95×10 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 61815-RSR model number is decoded
In the 61800-series (ISO 15 diameter series 8) the last two digits encode the bore: 61815 carries bore code 15 = 75 mm. Outside diameter 95 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 75 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude.
Typical equipment & failure modes
Common applications
- packaging machinery
- space-constrained gearboxes
- clutch and transmission assemblies
- robotics and automation joints
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
- cage damage from operation beyond the limiting speed
- electrical pitting in VFD-driven motors without grounding protection
Selection pitfalls — read before you substitute
- Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 61815 with C3 for those conditions.
- The 618xx thin section at 75 mm bore has only a 10.0 mm radial section height: it saves space but is highly sensitive to misalignment, shaft deflection and shock loads — verify shaft stiffness before choosing it over a 6215.
- RSR low-friction seals on 61815-RSR run faster than contact-seal 61815-2RS but let fine dust and moisture past the non-contact lip; in dirty or wet duty specify 61815-2RS instead.
- The non-contact lip of 61815-RSR does not retain a lifetime grease fill the way a contact seal does; confirm the regreasing interval for the 75 mm bore position before relying on it as sealed-for-life.
- Assign fits by which ring rotates: an interference shaft fit for a rotating inner ring; if the outer ring rotates instead, reverse the logic — a loose rotating ring creeps and frets its seat.
- SKF catalogues the low-friction seal as 61815-2RZ (suffix -2RSL or -2RZ): a non-contact elastomer lip that runs near the open 7000 r/min limiting speed, closer to the open bearing's 14000 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 12.5/10.8 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 61815-RSR bearing?
A 61815-RSR deep-groove ball bearing has a 75 mm bore, 95 mm outer diameter and 10 mm width (2.953 × 3.74 × 0.394 in), per ISO 15 boundary dimensions. It is fitted with two low-friction non-contact rubber seals.
How does the 61815 bore code work?
The last two digits of 61815 are bore code 15, giving 15 × 5 = 75 mm bore. The 95 mm outside diameter and 10 mm width follow the ISO 15 diameter series, not the bore code alone.
What does the RSR suffix on 61815-RSR mean?
RSR means two low-friction non-contact rubber seals. They keep coarse debris out with minimal drag (speed close to the open bearing) but are not liquid-tight; use -2RS contact seals for wet or fine-dust environments.
How does the 61800 compare with other series at the same 75 mm bore?
618 is an extra-thin section: 95×10 mm, only 10.0 mm radial section at 75 mm bore, far smaller than a 6215, for space-limited layouts at the cost of load rating and misalignment tolerance.
What is the SKF designation and catalogue data for 61815-RSR?
In the SKF Rolling Bearings catalogue this size is listed as 61815-2RZ — two low-friction non-contact elastomer seals, 75×95×10 mm per ISO 15. Quoted values: C 12.5 kN, C0 10.8 kN, Pu 0.585 kN, limiting speed 7000 r/min, mass 150 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61815-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.