61800 bearing: complete specifications & equivalents
The 61800 is a ISO 15 radial bearing sized 10 x 19 x 5 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 10 mm |
| Outer diameter D | 19 mm |
| Width B | 5 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1.72 kN |
| Basic static load rating C0 | 0.83 kN |
| Fatigue load limit Pu | 0.036 kN |
| Reference speed (thermal) | 80000 rpm |
| Limiting speed (mechanical) | 48000 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 5 g |
| Manufacturer designation | SKF 61800 |
| 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 | 0.394 in |
|---|---|
| Outer diameter D | 0.748 in |
| Width B | 0.197 in |
| ISO bore code | 00 |
| Radial section height (D−d)/2 | 4.5 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) | 11 of 74 |
| Bore above smallest 61800-series size | 9 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61800-2RS-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 61800-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. |
| 61800-ZZ-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 61800 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
| 61800-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 61800-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. |
| 61800-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 61800-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 61800-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant (OPEN vs 2RS) and load ratings differ — confirm sealing and rating before substituting. |
| 61800-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 61800-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant (OPEN vs RSR) and load ratings differ — confirm sealing and rating before substituting. |
| 61800-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×19×5 mm envelope per ISO 15; seal variant (OPEN vs ZZ) and load ratings differ — confirm sealing and rating before substituting. |
| W61800-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 61800-2RS1 shares the 10×19×5 mm envelope but rates differently (1.72/0.83 kN vs 1.48/0.83 kN) — not a load-rating equivalent. |
| W61800-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 61800-2Z shares the 10×19×5 mm envelope but rates differently (1.72/0.83 kN vs 1.48/0.83 kN) — not a load-rating equivalent. |
| W61800 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 61800 shares the 10×19×5 mm envelope but rates differently (1.72/0.83 kN vs 1.48/0.83 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 61800 model number is decoded
In the 61800-series (diameter series 8 of ISO 15) the last two digits encode the bore: 61800 carries bore code 00 = 10 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 19 mm and width 5 mm come from the ISO 15 boundary-dimensions general plan. With no seal suffix the bearing is open: no shields or seals are fitted and lubrication is supplied by the application. For normal-load mounting with a rotating inner ring on a 10 mm shaft, typical catalogue practice is a j5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. In the SKF catalogue this open execution carries the bare designation; protected variants are ordered separately as -2Z and -2RSH.
Typical equipment & failure modes
Common applications
- lay shafts and idler shafts
- textile machinery
- packaging machinery
- space-constrained gearboxes
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- raceway smearing under marginal lubrication at start-up
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- Miniature bearings like 61800 (10 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.
- Only 4.5 mm of radial section separates bore and OD on the 618xx series at 10 mm: ring flex from clamping or an oval housing bore transfers straight into raceway stress, so seat roundness matters more here than on a 6200.
- The open 61800 has no lubricant retention: grease escapes and contaminants migrate straight into the 10×19×5 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Storage matters for open bearings: 61800 leaves the factory with rust preventive only, so clean it and apply the service grease at assembly even if the rings look oily from the wrapper.
- Never mix components between two 61800 units: rings, cage and balls are factory-matched and are not field-interchangeable, even between identical designations.
- Measure the shaft, do not trust the drawing: a 10 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 61800.
- The open 61800 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 61800-2Z (shields) and 61800-2RSH (contact seals), not suffix-free 61800.
- The 1.72/0.83 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 61800 bearing?
A 61800 deep-groove ball bearing has a 10 mm bore, 19 mm outer diameter and 5 mm width (0.394 × 0.748 × 0.197 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
What does no suffix on 61800 mean?
A bare 61800 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication.
How does the 61800 compare with other series at the same 10 mm bore?
618 is an extra-thin section: 19×5 mm, only 4.5 mm radial section at 10 mm bore, far smaller than a 6200, for space-limited layouts at the cost of load rating and misalignment tolerance.
Are 61800 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 61800 uses the same ISO 15 envelope (10×19×5 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting.
What is the SKF designation and catalogue data for 61800?
In the SKF Rolling Bearings catalogue this size is listed as 61800 — the open (unsealed) execution, 10×19×5 mm per ISO 15. Quoted values: C 1.72 kN, C0 0.83 kN, Pu 0.036 kN, limiting speed 48000 r/min, mass 5 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 61800.
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.