Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
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You entered F634-ZZ. This table explores the base group F634; 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.
“F634” across 2 loaded brands
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Brand differences at a glance
| Parameter | NSKF6344 × 16 × 5 mm | KOYOF6344 × 16 × 5 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | KOYO |
| Designation | F634 | F634 |
| 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 | 4 mm | 4 mm |
| Outside diameterD | 16 mm | 16 mm |
| WidthB | 5 mm | 5 mm |
| Basic dynamic load ratingC | 1.91 kN | 1.7 kN |
| Basic static load ratingC0 | 0.67 kN | 0.52 kN |
| Fatigue load limitPu | — | 0.01 kN |
| Limiting speednG | — | 47000 r/min |
| Mass≈m | 0.00573 kg | 0.005 kg |
| Sealing | Open | Open |
| Boundary dimensions | ||
| Body outside diameterD | 16 mm | — |
| Bearing width (open)B | 5 mm | — |
| Minimum bearing chamferr min. | 0.3 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 | 18 mm | — |
| Flange widthC1 | 1 mm | — |
| Load ratings | ||
| Basic dynamic radial load ratingCr | 1910 N | — |
| Basic static radial load ratingC0r | 670 N | — |
| Lubrication-qualified speed | ||
| Limiting speed with grease | 36000 r/min | — |
| Limiting speed with oil (open) | 43000 r/min | — |
| Manufacturer Identity | ||
| Official Class Key | — | 010-020-020 |
| Mounting dimensions | ||
| Minimum shaft shoulder diameter (open)da min. | 6 mm | — |
| Maximum adjacent fillet radiusra max. | 0.3 mm | — |
| Reference mass | ||
| Approximate catalogue mass (open) | 5.73 g | — |
| Technical Data | ||
| d | — | 16 mm |
| B | — | 5 mm |
| R(Min.) | — | 0.3 mm |
| Basic Load Ratings : Cr | — | 1.70 kN |
| Basic Load Ratings : C0R | — | 0.52 kN |
| Fatigue Load Limit : Cu | — | 0.010 kN |
| Factor : F0 | — | 13.0 |
| Limiting Speeds(Grease Lub.) | — | 47000 min-1 |
| Limiting Speeds(Oil Lub.) | — | 55000 min-1 |
| Dimensions Of Flange D1 | — | 18 mm |
| Dimensions Of Flange C1 | — | 1 mm |
| Da(Min.) | — | 6 mm |
| Ra(Max.) | — | 0.3 mm |
| Mass(Refer.) | — | 5.7 g |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.