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| Parameter | NSKF6911 × 4 × 1.6 mm | KOYOF6911 × 4 × 1.6 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | KOYO |
| Designation | F691 | F691 |
| 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 | 4 mm | 4 mm |
| WidthB | 1.6 mm | 1.6 mm |
| Basic dynamic load ratingC | 0.153 kN | 0.17 kN |
| Basic static load ratingC0 | 0.036 kN | 0.04 kN |
| Fatigue load limitPu | — | 0.001 kN |
| Limiting speednG | — | 120000 r/min |
| Mass≈m | 0.00014 kg | 0 kg |
| Sealing | Open | Open |
| Boundary dimensions | ||
| Body outside diameterD | 4 mm | — |
| Bearing width (open)B | 1.6 mm | — |
| Minimum bearing chamferr min. | 0.1 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 | 5 mm | — |
| Flange widthC1 | 0.5 mm | — |
| Load ratings | ||
| Basic dynamic radial load ratingCr | 153 N | — |
| Basic static radial load ratingC0r | 36 N | — |
| Lubrication-qualified speed | ||
| Limiting speed with grease | 100000 r/min | — |
| Limiting speed with oil (open) | 120000 r/min | — |
| Manufacturer Identity | ||
| Official Class Key | — | 010-020-020 |
| Mounting dimensions | ||
| Minimum shaft shoulder diameter (open)da min. | 1.8 mm | — |
| Maximum adjacent fillet radiusra max. | 0.1 mm | — |
| Reference mass | ||
| Approximate catalogue mass (open) | 0.14 g | — |
| Technical Data | ||
| d | — | 4 mm |
| B | — | 1.6 mm |
| R(Min.) | — | 0.1 mm |
| Basic Load Ratings : Cr | — | 0.17 kN |
| Basic Load Ratings : C0R | — | 0.04 kN |
| Fatigue Load Limit : Cu | — | 0.001 kN |
| Factor : F0 | — | 11.4 |
| Limiting Speeds(Grease Lub.) | — | 120000 min-1 |
| Limiting Speeds(Oil Lub.) | — | 140000 min-1 |
| Dimensions Of Flange D1 | — | 5 mm |
| Dimensions Of Flange C1 | — | 0.5 mm |
| Da(Min.) | — | 1.8 mm |
| Ra(Max.) | — | 0.1 mm |
| Mass(Refer.) | — | 0.1 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.