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.
Dimensions verified
“NJ338” across 3 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | TIMKENNJ338EMA190 × 400 × 78 mm | NSKNJ338EM190 × 400 × 78 mm | KOYONJ338190 × 400 × 78 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | TIMKEN | NSK | KOYO |
| Designation | NJ338EMA | NJ338EM | NJ338 |
| Product family | Cylindrical 1-Row | Cylindrical roller bearing | Single-row / NJ |
| Detailed type | Cylindrical roller bearings | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | EX27728 | — | — |
| Bore diameterd | 190 mm | 190 mm | 190 mm |
| Outside diameterD | 400 mm | 400 mm | 400 mm |
| WidthB | 78 mm | 78 mm | 78 mm |
| Basic dynamic load ratingC | 1300 kN | 1300 kN | 1220 kN |
| Basic static load ratingC0 | 1500 kN | 1340 kN | 1260 kN |
| Fatigue load limitPu | — | — | 146 kN |
| Limiting speednG | — | — | 1300 r/min |
| Mass≈m | 50.2 kg | — | 53.5 kg |
| Sealing | Open | — | — |
| Cage | Window Brass cage | Machined brass | — |
| Boundary dimensions | |||
| Bearing widthB | — | 78 mm | — |
| Minimum bearing chamferr min. | — | 5 mm | — |
| Minimum secondary bearing chamferr1 min. | — | 5 mm | — |
| Roller inscribed circle diameterFw | — | 245 mm | — |
| Calculation Factors | |||
| K Factor | 0.00 | — | — |
| Y1 Factor | 0.00 | — | — |
| Y2 Factor | 0.00 | — | — |
| Y0 Factor | 0.00 | — | — |
| E Factor | 0.00 | — | — |
| Cg Factor | 0.1426 | — | — |
| Catalogue reference mass | |||
| Approximate shared-row mass — not separately stated for each rib arrangement | — | 50.6 kg | — |
| Classification | |||
| Official Category Path | — | — | Cylindrical roller bearings - Single-row - NJ |
| Official Classification 1 | — | — | Cylindrical roller bearings / Single-row / NJ |
| Construction | |||
| Single-row construction type | — | NJ | — |
| Rib arrangement | — | Two outer-ring ribs; one inner-ring rib | — |
| 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 | — | 1300000 N | — |
| Basic static radial load ratingC0r | — | 1340000 N | — |
| Lubrication-qualified speed — standard cage | |||
| Thermal speed rating — oil bath | — | 1600 r/min | — |
| Mechanical limiting speed — forced oil circulation | — | 2600 r/min | — |
| Limiting speed — grease | — | 1400 r/min | — |
| Limiting speed — oil bath | — | 1700 r/min | — |
| Manufacturer Identity | |||
| Material Number | 000000000190019430 | — | — |
| Official Class Key | — | — | 040-010-000 |
| World Assembly Part Number | NJ338EMA | — | — |
| Inner Ring Part Number | 190ARJE03 | — | — |
| Outer Ring Part Number | 190ERUE03 | — | — |
| Drawing Number | M103411 | — | — |
| Upc | 0053893773896 | — | — |
| Official Source System | CORE BP - DS DF | — | — |
| Official Last Run | 2026-08-23T20:02:46.143 | — | — |
| Mounting dimensions — shown arrangement | |||
| Minimum shaft shoulder diameterdb min. | — | 210 mm | — |
| Maximum housing shoulder diameterDa max. | — | 380 mm | — |
| Maximum adjusting-ring diameter (NU/NJ arrangement)db max. | — | 240 mm | — |
| Maximum adjacent fillet radiusra max. | — | 4 mm | — |
| Maximum secondary adjacent fillet radiusrb max. | — | 4 mm | — |
| Product Identity | |||
| Type Description | Cylindrical 1-Row | — | — |
| Construction | Single Row Cylindrical Roller Bearing | Imperial Series | 7.4803 in Bore | 15.7480 in OD | 3.0709 in Width | Open | Cylindrical Bore | Machined Window Brass Cage | C0 Clearance | — | — |
| Number Of Rows | 1 | — | — |
| Tapered Bore | N | — | — |
| Technical Data | |||
| d | — | — | 400 mm |
| B | — | — | 78 mm |
| R(Min.) | — | — | 5 mm |
| R1(Min.) | — | — | 5 mm |
| Overall Width | 0.000 mm | — | — |
| Fw | — | — | 245 mm |
| Radial Rating | 1,300,000 N | — | — |
| Ew | — | — | - mm |
| Axial Rating | 0 N | — | — |
| Basic Load Ratings : Cr | — | — | 1220 kN |
| Dynamic Rating C1 | 1,300,000 N | — | — |
| Basic Load Ratings : C0R | — | — | 1260 kN |
| Dynamic Rating C90 | 0 N | — | — |
| Fatigue Load Limit : Cu | — | — | 146 kN |
| Dynamic Axial Rating Ca90 | 0 N | — | — |
| Limiting Speeds(Grease Lub.) | — | — | 1300 min-1 |
| Dynamic Axial Rating Ca1 | 0 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | 1800 min-1 |
| Static Radial Rating C0 | 1,500,000 N | — | — |
| Sd1 | — | — | - mm |
| Extended Dynamic Rating Ce | 0 N | — | — |
| B1 | — | — | - mm |
| Static Axial Rating C0A | 0 N | — | — |
| B2 | — | — | - mm |
| Da(Min.) | — | — | - mm |
| Db(Min.) | — | — | - mm |
| Db(Max.) | — | — | - mm |
| Dc(Min.) | — | — | - mm |
| Dd(Min.) | — | — | - mm |
| Da(Max.) | — | — | 380 mm |
| Ra(Max.) | — | — | 4 mm |
| Rb(Max.) | — | — | 4 mm |
| Mass(Refer.) | — | — | 53.5 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.