Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Cross Reference centre · Interchange verification checklist · Understand suffix differences
You entered 6811-2RD. This table explores the base group 6811; it does not preserve or approve every requested suffix. Search your complete marking first →
One base designation across loaded brands
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“6811” across 2 loaded brands
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Brand differences at a glance
| Parameter | NSK681155 × 72 × 9 mm | KOYO681155 × 72 × 9 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | KOYO |
| Designation | 6811 | 6811 |
| Product family | Single row deep groove ball bearings | Single-row / Open type |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings |
| Bore diameterd | 55 mm | 55 mm |
| Outside diameterD | 72 mm | 72 mm |
| WidthB | 9 mm | 9 mm |
| Basic dynamic load ratingC | 9.7 kN | 11 kN |
| Basic static load ratingC0 | 8.5 kN | 8.1 kN |
| Fatigue load limitPu | — | 0.42 kN |
| Limiting speednG | — | 8700 r/min |
| Mass≈m | 0.081 kg | 0.083 kg |
| Sealing | Open | Open |
| Boundary dimensions | ||
| Bearing widthB | 9 mm | — |
| Minimum bearing chamferr min. | 0.3 mm | — |
| Classification | ||
| Official Category Path | — | Deep groove ball bearings - Single-row - Open type |
| Official Classification 1 | — | Deep groove ball bearings / Single-row / Open type |
| Construction | ||
| Catalogue closure construction | Open | — |
| Load ratings | ||
| Basic dynamic radial load ratingCr | 9700 N | — |
| Basic static radial load ratingC0r | 8500 N | — |
| Equivalent-load calculation factorf0 | 17 | — |
| Lubrication-qualified speed | ||
| Limiting speed with grease | 8500 r/min | — |
| Limiting speed with oil (open bearing) | 10000 r/min | — |
| Manufacturer Identity | ||
| Official Class Key | — | 010-010-010 |
| Mounting dimensions | ||
| Minimum shaft shoulder diameterda min. | 57 mm | — |
| Maximum shaft shoulder diameterda max. | 59 mm | — |
| Maximum housing shoulder diameterDa max. | 70 mm | — |
| Maximum shaft or housing fillet radiusra max. | 0.3 mm | — |
| Reference mass | ||
| Approximate catalogue mass (open reference) | 0.081 kg | — |
| Technical Data | ||
| d | — | 72 mm |
| B | — | 9 mm |
| R(Min.) | — | 0.3 mm |
| Basic Load Ratings : Cr | — | 11.0 kN |
| Basic Load Ratings : C0R | — | 8.10 kN |
| Fatigue Load Limit : Cu | — | 0.420 kN |
| Factor : F0 | — | 16.2 |
| Limiting Speeds(Grease Lub.) | — | 8700 min-1 |
| Limiting Speeds(Oil Lub.) | — | 10000 min-1 |
| Da(Min.) | — | 57 mm |
| Da(Max.) | — | 70 mm |
| Ra(Max.) | — | 0.3 mm |
| Mass(Refer.) | — | 0.083 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.