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
“51424” 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 | NSK51424X120 × 250 × 102 mm | KOYO51424120 × 250 × 102 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | KOYO |
| Designation | 51424X | 51424 |
| Product family | Axial deep groove ball bearing | Single direction / With flat back faces |
| Detailed type | Axial deep groove ball bearings | Axial deep groove ball bearings |
| Bore diameterd | 120 mm | 120 mm |
| Outside diameterD | 250 mm | 250 mm |
| WidthB | 102 mm | 102 mm |
| Fatigue load limitPu | — | 48.5 kN |
| Limiting speednG | — | 520 r/min |
| Mass≈m | 26.2 kg | 25 kg |
| Assembly boundary dimensions | ||
| Shaft-washer bore diameterd | 120 mm | — |
| Overall outside diameterD | 250 mm | — |
| Complete assembled heightT | 102 mm | — |
| Axial load ratings | ||
| Basic dynamic axial load ratingCa | 480000 N | — |
| Basic static axial load ratingC0a | 1400000 N | — |
| Chamfers | ||
| Minimum housing-side chamferr min. | 4 mm | — |
| Classification | ||
| Official Category Path | — | Thrust ball bearings - Single direction - With flat back faces |
| Official Classification 1 | — | Thrust ball bearings / Single direction / With flat back faces |
| Component dimensions | ||
| Shaft washer outside diameterd1 | 245 mm | — |
| Housing washer bore diameterD1 | 123 mm | — |
| Construction | ||
| Axial load directions | One direction | — |
| Seat construction | Flat seat | — |
| Radial-load support | Not suitable for radial load; separate radial support required | — |
| Lubrication-qualified speed | ||
| Limiting speed — grease | 600 r/min | — |
| Limiting speed — oil | 900 r/min | — |
| Manufacturer Identity | ||
| Official Class Key | — | 070-010-000 |
| Mass reference | ||
| Approximate assembly mass | 26.2 kg | — |
| Mounting dimensions | ||
| Minimum shaft abutment diameterda min. | 196 mm | — |
| Maximum housing abutment diameterDa max. | 174 mm | — |
| Maximum housing-side fillet radiusra max. | 3 mm | — |
| Technical Data | ||
| d | — | 250 mm |
| T | — | 102 mm |
| R(Min.) | — | 4 mm |
| Basic Load Ratings Ca | — | 601 kN |
| Basic Load Ratings C0A | — | 1460 kN |
| Fatigue Load Limit : Cu | — | 48.5 kN |
| Limiting Speeds(Grease Lub.) | — | 520 min-1 |
| Limiting Speeds(Oil Lub.) | — | 800 min-1 |
| D1(Max.) | — | 245 mm |
| D1(Min.) | — | 123 mm |
| D2 | — | - mm |
| D3 | — | - mm |
| A | — | - mm |
| R | — | - mm |
| C | — | - mm |
| Da(Min.) | — | 196 mm |
| Da(Max.) | — | 174 mm |
| Ra(Max.) | — | 3 mm |
| Mass(Refer.) | — | 25 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.