61812-RSR bearing: complete specifications & equivalents
The 61812-RSR is a ISO 15 radial bearing sized 60 x 78 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 | 60 mm |
| Outer diameter D | 78 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 | 11.9 kN |
| Basic static load rating C0 | 11.4 kN |
| Fatigue load limit Pu | 0.49 kN |
| Reference speed (thermal) | 17000 rpm |
| Limiting speed (mechanical) | 8500 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 110 g |
| Manufacturer designation | SKF 61812-2RZ |
| 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 & 61800-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 3.071 in |
| Width B | 0.394 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 9 mm |
| Smallest bore in 61800-series | 1 mm |
| Largest outer diameter in 61800-series | 1820 mm |
| Width range across 61800-series | 1–140 mm |
| Bore position in 61800-series (smallest first) | 23 of 74 |
| Bore above smallest 61800-series size | 59 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61812-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×78×10 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61812-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×78×10 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61812-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. |
| 61812-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×78×10 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| 61812-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×78×10 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 61812-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×78×10 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 61812-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. |
| 61812-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 60×78×10 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 61812-RSR model number is decoded
In the 61800-series (diameter series 8 of ISO 15) the last two digits encode the bore: 61812 carries bore code 12 = 60 mm. Outside diameter 78 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 60 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 61812-2RZ.
Typical equipment & failure modes
Common applications
- robotics and automation joints
- lay shafts and idler shafts
- textile machinery
- packaging machinery
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 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 61812 with C3 for those conditions.
- Only 9.0 mm of radial section separates bore and OD on the 618xx series at 60 mm: ring flex from clamping or an oval housing bore transfers straight into raceway stress, so seat roundness matters more here than on a 6212.
- RSR low-friction seals on 61812-RSR run faster than contact-seal 61812-2RS but let fine dust and moisture past the non-contact lip; in dirty or wet duty specify 61812-2RS instead.
- The non-contact lip of 61812-RSR does not retain a lifetime grease fill the way a contact seal does; confirm the regreasing interval for the 60 mm bore position before relying on it as sealed-for-life.
- Measure the shaft, do not trust the drawing: a 60 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 61812-RSR.
- Suffixes stack in a defined order — clearance follows the seal code, e.g. 61812-C3. No clearance suffix means normal CN clearance.
- SKF catalogues the low-friction seal as 61812-2RZ (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 11.9/11.4 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 61812-RSR bearing?
A 61812-RSR deep-groove ball bearing has a 60 mm bore, 78 mm outer diameter and 10 mm width (2.362 × 3.071 × 0.394 in), per ISO 15 boundary dimensions. It is fitted with two low-friction non-contact rubber seals.
How does the 61800 compare with other series at the same 60 mm bore?
618 is an extra-thin section: 78×10 mm, only 9.0 mm radial section at 60 mm bore, far smaller than a 6212, for space-limited layouts at the cost of load rating and misalignment tolerance.
Are 61812 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 61812 uses the same ISO 15 envelope (60×78×10 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 61812-RSR have?
Unless a clearance suffix says otherwise, 61812-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 61812 and verify the residual clearance after mounting.
What is the SKF designation and catalogue data for 61812-RSR?
In the SKF Rolling Bearings catalogue this size is listed as 61812-2RZ — two low-friction non-contact elastomer seals, 60×78×10 mm per ISO 15. Quoted values: C 11.9 kN, C0 11.4 kN, Pu 0.49 kN, limiting speed 8500 r/min, mass 110 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61812-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.