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
“NF304” 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.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | NSKNF304W20 × 52 × 15 mm | KOYONF30420 × 52 × 15 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | KOYO |
| Designation | NF304W | NF304 |
| Product family | Cylindrical roller bearing | Single-row / NF |
| Detailed type | Cylindrical roller bearings | Cylindrical roller bearings |
| Bore diameterd | 20 mm | 20 mm |
| Outside diameterD | 52 mm | 52 mm |
| WidthB | 15 mm | 15 mm |
| Basic dynamic load ratingC | 26.3 kN | 28.9 kN |
| Basic static load ratingC0 | 17.3 kN | 19.2 kN |
| Fatigue load limitPu | — | 2.5 kN |
| Limiting speednG | — | 12000 r/min |
| Mass≈m | — | 0.15 kg |
| Cage | Pressed steel | — |
| Boundary dimensions | ||
| Bearing widthB | 15 mm | — |
| Minimum bearing chamferr min. | 1.1 mm | — |
| Minimum secondary bearing chamferr1 min. | 0.6 mm | — |
| Roller circumscribed circle diameterEw | 44.5 mm | — |
| Catalogue reference mass | ||
| Approximate shared-row mass — not separately stated for each rib arrangement | 0.148 kg | — |
| Classification | ||
| Official Category Path | — | Cylindrical roller bearings - Single-row - NF |
| Official Classification 1 | — | Cylindrical roller bearings / Single-row / NF |
| Construction | ||
| Single-row construction type | NF | — |
| Rib arrangement | Two inner-ring ribs; one outer-ring rib | — |
| Standard cage material | Pressed steel | — |
| Standard cage marking | W | — |
| Other cage codes listed for this catalogue row | None listed in this row | — |
| Precision — designation omission rule | ISO Normal when no precision suffix is specified | — |
| Clearance identification — verify interchangeability | No clearance suffix shown. CN omission applies to interchangeable designs; do not infer a numerical clearance. | — |
| Optimized crowning note | No optimized-crowning asterisk on this row | — |
| Load ratings — standard cage | ||
| Basic dynamic radial load ratingCr | 26300 N | — |
| Basic static radial load ratingC0r | 17300 N | — |
| Lubrication-qualified speed — standard cage | ||
| Thermal speed rating — oil bath | 14000 r/min | — |
| Mechanical limiting speed — forced oil circulation | Not stated in this catalogue row | — |
| Limiting speed — grease | 10000 r/min | — |
| Limiting speed — oil bath | 12000 r/min | — |
| Manufacturer Identity | ||
| Official Class Key | — | 040-010-000 |
| Mounting dimensions — shown arrangement | ||
| Minimum shaft shoulder diameterda min. | 26.5 mm | — |
| Maximum housing shoulder diameterDb max. | 48 mm | — |
| Minimum housing shoulder diameterDb min. | 46 mm | — |
| Maximum adjacent fillet radiusra max. | 1 mm | — |
| Maximum secondary adjacent fillet radiusrb max. | 0.6 mm | — |
| Technical Data | ||
| d | — | 52 mm |
| B | — | 15 mm |
| R(Min.) | — | 1.1 mm |
| R1(Min.) | — | 0.6 mm |
| Fw | — | - mm |
| Ew | — | 44.5 mm |
| Basic Load Ratings : Cr | — | 28.9 kN |
| Basic Load Ratings : C0R | — | 19.2 kN |
| Fatigue Load Limit : Cu | — | 2.50 kN |
| Limiting Speeds(Grease Lub.) | — | 12000 min-1 |
| Limiting Speeds(Oil Lub.) | — | 16000 min-1 |
| Sd1 | — | - mm |
| B1 | — | - mm |
| B2 | — | - mm |
| Da(Min.) | — | 26.5 mm |
| Db(Min.) | — | 45.5 mm |
| Db(Max.) | — | 48 mm |
| Dc(Min.) | — | - mm |
| Dd(Min.) | — | - mm |
| Da(Max.) | — | - mm |
| Ra(Max.) | — | 1 mm |
| Rb(Max.) | — | 0.6 mm |
| Mass(Refer.) | — | 0.150 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.