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
“N338” 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 | NSKN338M190 × 400 × 78 mm | KOYON338190 × 400 × 78 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | NSK | KOYO |
| Designation | N338M | N338 |
| Product family | Cylindrical roller bearing | Single-row / N |
| Detailed type | Cylindrical roller bearings | Cylindrical roller bearings |
| Bore diameterd | 190 mm | 190 mm |
| Outside diameterD | 400 mm | 400 mm |
| WidthB | 78 mm | 78 mm |
| Basic dynamic load ratingC | 1200 kN | 1220 kN |
| Basic static load ratingC0 | 1260 kN | 1260 kN |
| Fatigue load limitPu | — | 146 kN |
| Limiting speednG | — | 1300 r/min |
| Mass≈m | — | 48 kg |
| Cage | Machined brass | — |
| Boundary dimensions | ||
| Bearing widthB | 78 mm | — |
| Minimum bearing chamferr min. | 5 mm | — |
| Minimum secondary bearing chamferr1 min. | 5 mm | — |
| Roller circumscribed circle diameterEw | 345 mm | — |
| Catalogue reference mass | ||
| Approximate shared-row mass — not separately stated for each rib arrangement | 48.7 kg | — |
| Classification | ||
| Official Category Path | — | Cylindrical roller bearings - Single-row - N |
| Official Classification 1 | — | Cylindrical roller bearings / Single-row / N |
| Construction | ||
| Single-row construction type | N | — |
| Rib arrangement | Two inner-ring ribs; ribless outer ring | — |
| Standard cage material | Machined brass | — |
| Standard cage marking | M | — |
| 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 | 1200000 N | — |
| Basic static radial load ratingC0r | 1260000 N | — |
| Lubrication-qualified speed — standard cage | ||
| Thermal speed rating — oil bath | 1600 r/min | — |
| Mechanical limiting speed — forced oil circulation | Not stated in this catalogue row | — |
| Limiting speed — grease | 1400 r/min | — |
| Limiting speed — oil bath | 1700 r/min | — |
| Manufacturer Identity | ||
| Official Class Key | — | 040-010-000 |
| Mounting dimensions — shown arrangement | ||
| Minimum shaft shoulder diameterda min. | 210 mm | — |
| Maximum housing shoulder diameterDb max. | 380 mm | — |
| Minimum housing shoulder diameterDb min. | 352 mm | — |
| Maximum adjacent fillet radiusra max. | 4 mm | — |
| Maximum secondary adjacent fillet radiusrb max. | 4 mm | — |
| Technical Data | ||
| d | — | 400 mm |
| B | — | 78 mm |
| R(Min.) | — | 5 mm |
| R1(Min.) | — | 5 mm |
| Fw | — | - mm |
| Ew | — | 345 mm |
| Basic Load Ratings : Cr | — | 1220 kN |
| Basic Load Ratings : C0R | — | 1260 kN |
| Fatigue Load Limit : Cu | — | 146 kN |
| Limiting Speeds(Grease Lub.) | — | 1300 min-1 |
| Limiting Speeds(Oil Lub.) | — | 1800 min-1 |
| Sd1 | — | - mm |
| B1 | — | - mm |
| B2 | — | - mm |
| Da(Min.) | — | 210 mm |
| Db(Min.) | — | 349 mm |
| Db(Max.) | — | 380 mm |
| Dc(Min.) | — | - mm |
| Dd(Min.) | — | - mm |
| Da(Max.) | — | - mm |
| Ra(Max.) | — | 4 mm |
| Rb(Max.) | — | 4 mm |
| Mass(Refer.) | — | 48.0 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.