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| Parameter | NSKF686A6 × 13 × 3.5 mm | KOYOF6866 × 13 × 3.5 mm | EZOF686ZZ6 × 13 × 5 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | NSK | KOYO | EZO |
| Designation | F686A | F686 | F686ZZ |
| 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 | 6 mm | 6 mm | 6 mm |
| Outside diameterD | 13 mm | 13 mm | 13 mm |
| WidthB | 3.5 mm | 3.5 mm | 5 mm |
| Basic dynamic load ratingC | 1.19 kN | 1.35 kN | 1.08 kN |
| Basic static load ratingC0 | 0.44 kN | 0.44 kN | 0.438 kN |
| Fatigue load limitPu | — | 0.01 kN | — |
| Limiting speednG | — | 48000 r/min | — |
| Mass≈m | 0.00225 kg | 0.002 kg | 0.00286 kg |
| Sealing | Open | Open | Two pressed-steel shields |
| Bearing material | — | — | High-carbon chromium bearing steel |
| Boundary dimensions | |||
| Body outside diameterD | 13 mm | — | — |
| Bearing width (open)B | 3.5 mm | — | — |
| Outer diameterD | — | — | 13 mm |
| Minimum bearing chamferr min. | 0.15 mm | — | — |
| Outer diameterD | — | — | 0.5118 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 | — | — | 0.15 mm |
| Inner ring chamfer dimensionr si min | — | — | 0.0059 inch |
| Outer ring chamfer dimensionr se min | — | — | 0.15 mm |
| Outer ring chamfer dimensionr se min | — | — | 0.0059 inch |
| Flange outer diameterD 1 | — | — | 15 mm |
| Flange outer diameterD 1 | — | — | 0.5906 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 | 15 mm | — | — |
| Flange widthC1 | 1 mm | — | — |
| Load ratings | |||
| Basic dynamic radial load ratingCr | 1190 N | — | — |
| Basic static radial load ratingC0r | 440 N | — | — |
| Lubrication-qualified speed | |||
| Limiting speed with grease | 40000 r/min | — | — |
| Limiting speed with oil (open) | 50000 r/min | — | — |
| Catalogue limiting speed (grease) | — | — | 48000 r/min |
| Catalogue limiting speed (oil) | — | — | 56000 r/min |
| Manufacturer Identity | |||
| Official Class Key | — | 010-020-020 | — |
| Mounting dimensions | |||
| Minimum shaft shoulder diameter (open)da min. | 7.2 mm | — | — |
| Maximum adjacent fillet radiusra max. | 0.15 mm | — | — |
| Adjacent mounting dimension (da min)da min | — | — | 7.2 mm |
| Adjacent mounting dimension (da min)da min | — | — | 0.2835 inch |
| Adjacent mounting dimension (da max)da max | — | — | 7.3 mm |
| Adjacent mounting dimension (da max)da max | — | — | 0.2874 inch |
| Adjacent mounting dimension (r asi max)r asi max | — | — | 0.15 mm |
| Adjacent mounting dimension (r asi max)r asi max | — | — | 0.0059 inch |
| Reference mass | |||
| Approximate catalogue mass (open) | 2.25 g | — | — |
| Reference mass | — | — | 2.86 g |
| Rolling elements | |||
| Ball diameterDw | — | — | 2 mm |
| Ball quantityZ | — | — | 8 |
| Technical Data | |||
| d | — | 13 mm | — |
| B | — | 3.5 mm | — |
| R(Min.) | — | 0.15 mm | — |
| Basic Load Ratings : Cr | — | 1.35 kN | — |
| Basic Load Ratings : C0R | — | 0.44 kN | — |
| Fatigue Load Limit : Cu | — | 0.010 kN | — |
| Factor : F0 | — | 13.7 | — |
| Limiting Speeds(Grease Lub.) | — | 48000 min-1 | — |
| Limiting Speeds(Oil Lub.) | — | 57000 min-1 | — |
| Dimensions Of Flange D1 | — | 15 mm | — |
| Dimensions Of Flange C1 | — | 1 mm | — |
| Da(Min.) | — | 7.2 mm | — |
| Ra(Max.) | — | 0.15 mm | — |
| Mass(Refer.) | — | 2.1 g | — |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.