Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Automatic candidate selection
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.
Designation candidates
“F688” across 3 loaded brands
One highest-ranked designation candidate is shown per manufacturer. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | NSKF688A8 × 16 × 4 mm | KOYOF6888 × 16 × 4 mm | EZOF688ZZ8 × 16 × 5 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | NSK | KOYO | EZO |
| Designation | F688A | F688 | F688ZZ |
| Product family | Single row deep groove ball bearings | Extra-small, miniature ball bearings / Flanged type / Open | Flanged Miniature Ball Bearing |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings |
| Bore diameterd | 8 mm | 8 mm | 8 mm |
| Outside diameterD | 16 mm | 16 mm | 16 mm |
| WidthB | 4 mm | 4 mm | 5 mm |
| Basic dynamic load ratingC | 1.77 kN | 1.55 kN | 1.26 kN |
| Basic static load ratingC0 | 0.71 kN | 0.59 kN | 0.59 kN |
| Fatigue load limitPu | — | 0.02 kN | — |
| Limiting speednG | — | 42000 r/min | — |
| Mass≈m | 0.00354 kg | 0.003 kg | 0.00425 kg |
| Sealing | Open | Open | Two pressed-steel shields |
| Bearing material | — | — | High-carbon chromium bearing steel |
| Boundary dimensions | |||
| Body outside diameterD | 16 mm | — | — |
| Bearing width (open)B | 4 mm | — | — |
| Outer diameterD | — | — | 16 mm |
| Minimum bearing chamferr min. | 0.2 mm | — | — |
| Outer diameterD | — | — | 0.6299 inch |
| Inner ring widthB | — | — | 5 mm |
| Inner ring widthB | — | — | 0.1969 inch |
| Outer ring widthC | — | — | 5 mm |
| Outer ring widthC | — | — | 0.1969 inch |
| Inner ring chamfer dimensionr si min | — | — | 0.2 mm |
| Inner ring chamfer dimensionr si min | — | — | 0.0079 inch |
| Outer ring chamfer dimensionr se min | — | — | 0.2 mm |
| Outer ring chamfer dimensionr se min | — | — | 0.0079 inch |
| Flange outer diameterD 1 | — | — | 18 mm |
| Flange outer diameterD 1 | — | — | 0.7087 inch |
| Flange widthC 1 | — | — | 1.1 mm |
| Flange widthC 1 | — | — | 0.0433 inch |
| 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 | — | — |
| Closure interpretation | — | — | Two pressed-steel shields |
| Material interpretation | — | — | High-carbon chromium bearing steel |
| Flange dimensions | |||
| Flange outside diameterD1 | 18 mm | — | — |
| Flange widthC1 | 1 mm | — | — |
| Load ratings | |||
| Basic dynamic radial load ratingCr | 1770 N | — | — |
| Basic static radial load ratingC0r | 710 N | — | — |
| Lubrication-qualified speed | |||
| Limiting speed with grease | 36000 r/min | — | — |
| Limiting speed with oil (open) | 43000 r/min | — | — |
| Catalogue limiting speed (grease) | — | — | 40000 r/min |
| Catalogue limiting speed (oil) | — | — | 47000 r/min |
| Manufacturer Identity | |||
| Official Class Key | — | 010-020-020 | — |
| Mounting dimensions | |||
| Minimum shaft shoulder diameter (open)da min. | 9.6 mm | — | — |
| Maximum adjacent fillet radiusra max. | 0.2 mm | — | — |
| Adjacent mounting dimension (da min)da min | — | — | 9.5 mm |
| Adjacent mounting dimension (da min)da min | — | — | 0.374 inch |
| Adjacent mounting dimension (da max)da max | — | — | 9.6 mm |
| Adjacent mounting dimension (da max)da max | — | — | 0.378 inch |
| Adjacent mounting dimension (r asi max)r asi max | — | — | 0.2 mm |
| Adjacent mounting dimension (r asi max)r asi max | — | — | 0.0079 inch |
| Reference mass | |||
| Approximate catalogue mass (open) | 3.54 g | — | — |
| Reference mass | — | — | 4.25 g |
| Rolling elements | |||
| Ball diameterDw | — | — | 2 mm |
| Ball quantityZ | — | — | 10 |
| Technical Data | |||
| d | — | 16 mm | — |
| B | — | 4 mm | — |
| R(Min.) | — | 0.2 mm | — |
| Basic Load Ratings : Cr | — | 1.55 kN | — |
| Basic Load Ratings : C0R | — | 0.59 kN | — |
| Fatigue Load Limit : Cu | — | 0.020 kN | — |
| Factor : F0 | — | 14.8 | — |
| Limiting Speeds(Grease Lub.) | — | 42000 min-1 | — |
| Limiting Speeds(Oil Lub.) | — | 50000 min-1 | — |
| Dimensions Of Flange D1 | — | 18 mm | — |
| Dimensions Of Flange C1 | — | 1 mm | — |
| Da(Min.) | — | 9.6 mm | — |
| Ra(Max.) | — | 0.2 mm | — |
| Mass(Refer.) | — | 3.6 g | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.