61800-RSR bearing: complete specifications & equivalents
The 61800-RSR is a ISO 15 radial bearing sized 10 x 19 x 5 mm (bore x OD x width) with RSR sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NSK |
| Bore diameter d | 10 mm |
| Outer diameter D | 19 mm |
| Width B | 5 mm |
| Material | GCr15 |
| Seal / shield | RSR |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1.89 kN |
| Basic static load rating C0 | 0.84 kN |
| Mass | 5 g |
| Manufacturer designation | NSK 6800VV |
| Standard | ISO 15 |
| Catalog version | NSK Rolling Bearings E1103 Part C |
| Last verified | 2026-09-24 |
Source: catalog reference (NSK Rolling Bearings E1103 Part C) · extracted 2026-09-24
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 | 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) | 1 of 39 |
| Bore above smallest 61800-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61800 | ISO-INTERCHANGE | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 envelope interchange; NSK suffix 6800VV maps to industry-neutral RSR. Verify seal design, grease and speed rating per brand catalogue. |
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-RSR model number is decoded
In the 61800-series (ISO 15 diameter series 8) 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. 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 10 mm shaft, typical catalogue practice is a j5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude.
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
- electrical pitting in VFD-driven motors without grounding protection
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Bore codes 00–03 use the exception table: 61800 fits a 10 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).
- The 618xx thin section at 10 mm bore has only a 4.5 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 6200.
- RSR low-friction seals on 61800-RSR run faster than contact-seal 61800-2RS but let fine dust and moisture past the non-contact lip; in dirty or wet duty specify 61800-2RS instead.
- The non-contact lip of 61800-RSR does not retain a lifetime grease fill the way a contact seal does; confirm the regreasing interval for the 10 mm bore position before relying on it as sealed-for-life.
- Suffixes stack in a defined order — clearance follows the seal code, e.g. 61800-C3. No clearance suffix means normal CN clearance.
- NSK catalogues this low-friction non-contact seal as 6800VV (suffix VV), the NSK equivalent of the industry-neutral -RSR spelling on this page. VV is not liquid-tight; NSK's contact-seal suffix DDU (industry-neutral -2RS) is the choice for wet or fine-dust duty.
- The 1.89/0.84 kN ratings, mass 5 g here are NSK Rolling Bearings E1103 Part C catalogue figures for 6800VV; this seal/size combination has no counterpart in the SKF 17000 extract used elsewhere on this site, so the page rests on a single manufacturer source — internal geometry and ratings legitimately differ between brands, so re-verify before substituting in a rated drive.
Frequently asked questions
What are the dimensions of a 61800-RSR bearing?
A 61800-RSR 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 fitted with two low-friction non-contact rubber seals.
Why does 61800 not follow the bore-code × 5 rule?
Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 61800 with code 00 has a 10 mm bore. The code × 5 convention starts at code 04 (20 mm).
What does the RSR suffix on 61800-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 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.
What is the NSK designation and catalogue data for 61800-RSR?
In the NSK Rolling Bearings catalogue (E1103 Part C) this size is listed as 6800VV — two low-friction non-contact rubber seals (NSK suffix VV), 10×19×5 mm per ISO 15. Quoted values: C 1.89 kN, C0 0.84 kN, mass 5 g. The industry-neutral page spelling 61800-RSR follows the seal-suffix convention used across this site, not NSK order-number spelling. Reference and limiting speeds are not tabulated in the E1103 dimension tables used here; consult NSK speed tables before high-speed service.
Reviewed & verified by the MPN Base engineering desk against source catalog NSK Rolling Bearings E1103 Part C on 2026-09-24. Read our editorial & correction policy.