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 F681XZZ. This table explores the base group F681; it does not preserve or approve every requested suffix. Search your complete marking first →
One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
“F681” across 2 loaded brands
One highest-ranked designation candidate is shown per manufacturer. Use Custom Compare when you want to choose exact suffix variants yourself.
Brand differences at a glance
| Parameter | NSKF6811 × 3 × 1 mm | KOYOF6811 × 3 × 1 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | KOYO |
| Designation | F681 | F681 |
| Product family | Single row deep groove ball bearings | Extra-small, miniature ball bearings / Flanged type / Open |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings |
| Bore diameterd | 1 mm | 1 mm |
| Outside diameterD | 3 mm | 3 mm |
| WidthB | 1 mm | 1 mm |
| Basic dynamic load ratingC | 0.088 kN | 0.12 kN |
| Basic static load ratingC0 | 0.023 kN | 0.03 kN |
| Fatigue load limitPu | — | 0.0007 kN |
| Limiting speednG | — | 130000 r/min |
| Mass≈m | 0.00004 kg | 0 kg |
| Sealing | Open | Open |
| Boundary dimensions | ||
| Body outside diameterD | 3 mm | — |
| Bearing width (open)B | 1 mm | — |
| Minimum bearing chamferr min. | 0.05 mm | — |
| Classification | ||
| Official Category Path | — | Deep groove ball bearings - Extra-small, miniature ball bearings - Flanged type - Open |
| Official Classification 1 | — | Deep groove ball bearings / Extra-small, miniature ball bearings / Flanged type / Open |
| Construction | ||
| Catalogue closure construction | Open | — |
| Flange dimensions | ||
| Flange outside diameterD1 | 3.8 mm | — |
| Flange widthC1 | 0.3 mm | — |
| Load ratings | ||
| Basic dynamic radial load ratingCr | 88 N | — |
| Basic static radial load ratingC0r | 23 N | — |
| Lubrication-qualified speed | ||
| Limiting speed with grease | 130000 r/min | — |
| Limiting speed with oil (open) | 150000 r/min | — |
| Manufacturer Identity | ||
| Official Class Key | — | 010-020-020 |
| Mounting dimensions | ||
| Minimum shaft shoulder diameter (open)da min. | 1.4 mm | — |
| Maximum adjacent fillet radiusra max. | 0.05 mm | — |
| Reference mass | ||
| Approximate catalogue mass (open) | 0.04 g | — |
| Technical Data | ||
| d | — | 3 mm |
| B | — | 1 mm |
| R(Min.) | — | 0.07 mm |
| Basic Load Ratings : Cr | — | 0.12 kN |
| Basic Load Ratings : C0R | — | 0.03 kN |
| Fatigue Load Limit : Cu | — | 0.0007 kN |
| Factor : F0 | — | 11.6 |
| Limiting Speeds(Grease Lub.) | — | 130000 min-1 |
| Limiting Speeds(Oil Lub.) | — | 150000 min-1 |
| Dimensions Of Flange D1 | — | 3.8 mm |
| Dimensions Of Flange C1 | — | 0.3 mm |
| Da(Min.) | — | 1.6 mm |
| Ra(Max.) | — | 0.05 mm |
| Mass(Refer.) | — | 0.03 g |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.