Cross-brand designation analysis
COMPARE / VERIFY
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
“NNU4168” across 2 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 | SKFNNU 4168 M/W33340 × 580 × 243 mm | FAGNNU4168-M340 × 580 × 243 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | FAG |
| Designation | NNU 4168 M/W33 | NNU4168-M |
| Product family | Cylindrical roller bearings | — |
| Detailed type | Double row cylindrical roller bearing | Cylindrical roller bearings |
| Series | — | NNU4168 |
| Bore diameterd | 340 mm | 340 mm |
| Outside diameterD | 580 mm | 580 mm |
| WidthB | 243 mm | 243 mm |
| Basic dynamic load ratingC | 4020 kN | 3950 kN |
| Basic static load ratingC0 | 7500 kN | 7700 kN |
| Fatigue load limitPu | 620 kN | 760 kN |
| Reference speednref | 950 r/min | — |
| Limiting speednG | 1200 r/min | — |
| Mass≈m | 261 kg | 268.73 kg |
| Precision class | — | PN — Normal (ISO 492:2023) |
| Internal clearance | CN | CN (Group N) — Normal internal clearance |
| Sealing | Without | — |
| Cage | — | M — Brass Cage |
| Lubricant | None | — |
| Minimum operating temperatureTmin | — | -30 °C |
| Maximum operating temperatureTmax | — | 150 °C |
| Capabilities & suitability | ||
| Largebearing | — | Yes |
| Dimensions | ||
| Minimum chamfer dimensionr1 min | — | 5 mm |
| Minimum chamfer dimensionr1 min | — | 0.197 in |
| Raceway diameter inner ringF | 402 mm | 402 mm |
| Raceway diameter inner ringF | — | 15.827 in |
| Axial displacements | — | 10.3 mm |
| Axial displacements | — | 0.406 in |
| Shoulder diameter outer ringD1 | — | 502.5 mm |
| Shoulder diameter outer ringD1 | — | 19.783 in |
| Engineering — Abutment dimensions | ||
| Abutment diameter spacer sleeved a | max. 392 mm | — |
| Abutment diameter shaftd b | min. 407 mm | — |
| Abutment diameter spacer sleeve / housingD a | max. 560 mm | — |
| Fillet radiusr a | max. 4 mm | — |
| Fillet radiusr b | max. 4 mm | — |
| Engineering — Calculation data | ||
| Calculation factork r | 0.35 | — |
| Engineering — Dimensions | ||
| Overall bearing widthB | 243 mm | — |
| Shoulder diameter outer ringD 1 | ≈ 510 mm | — |
| Width of annular grooveb | 16.7 mm | — |
| Diameter lubrication holeK | 9 mm | — |
| Chamfer dimension outer ringr 1,2 | min. 5 mm | — |
| Chamfer dimension inner ringr 3,4 | min. 5 mm | — |
| Permissible axial displacement from the normal position of one bearing ring relative to the others | max. 10 mm | — |
| Engineering — Engineering specifications | ||
| Design variant/feature | NNU/W33 | — |
| Logistics | ||
| Product net weight | 261.0 kg | — |
| eClass code | 23-05-09-01 | — |
| UNSPSC code | 31171505 | — |
| Main Dimensions & Performance Data | ||
| Basic dynamic load rating, radialCr | — | 3,950,000 N |
| Basic dynamic load rating, radialCr | — | 888,039.568 lbf |
| Basic static load rating, radialC0r | — | 7,700,000 N |
| Basic static load rating, radialC0r | — | 1,731,115.108 lbf |
| Fatigue load limit, radialCur | — | 760,000 N |
| Fatigue load limit, radialCur | — | 170,863.309 lbf |
| Limiting speed for grease lubricationnG Grease | — | 1,480 1/min |
| Limiting speed for oil lubricationnG Oil | — | 1,740 1/min |
| Manufacturer Identity | ||
| Schaeffler Product Code | — | 374579 |
| Base Type | — | NNU4168 |
| Gpsd Group | — | F01 |
| Product Line Id | — | 75 |
| SAP material number | — | 0591049020000 |
| Base product | — | 2305090141 |
| Bearing X designation | — | NNU4168-M |
| Mounting Manager ID | — | NNU4168-M |
| Grease application ID | — | NNU4168-M |
| Mounting dimensions | ||
| Diameter shaft shoulderda | — | 360 mm |
| Diameter shaft shoulderda | — | 14.173 in |
| Diameter of housing shoulderDa | — | 560 mm |
| Diameter of housing shoulderDa | — | 22.047 in |
| Maximum recess radiusra1 max | — | 4 mm |
| Maximum recess radiusra1 max | — | 0.157 in |
| Product characteristics | ||
| Tolerance classPN | — | Normal (ISO 492:2023) |
| Radial internal clearanceCN (Group N) | — | Normal internal clearance |
| Number of rows2 | — | Double-row design |
| Product identity | ||
| Official product category | Cylindrical roller bearings | — |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/cylindrical-roller-bearings/double-row-cylindrical-roller-bearings | — |
| Structure group ID | BC2_001 | — |
| Available from SKF | Yes | — |
| Remanufacturable | Yes | — |
| Product Identity | ||
| Short Description | — | Cylindrical roller bearing |
| Properties | ||
| Bearing part | Complete bearing | — |
| Axial displacement capability | In both directions | — |
| Number of rows | 2 | — |
| Locating feature, bearing outer ring | Without | — |
| Bore type | Cylindrical | — |
| Number of flanges, outer ring | 3 | — |
| Number of flanges, inner ring | 0 | — |
| Loose flange | None | — |
| Radial internal clearance | CN | — |
| Coating | Without | — |
| Relubrication feature | With | — |
| Candidate for remanufacturing | Yes | — |
| Indicative carbon footprint for new product | 966.0 kg CO 2 e | — |
| Indicative carbon footprint for remanufactured product | 321.0 kg CO 2 e | — |
| Technical Data | ||
| Bore Diameter (D) | — | 340 mm |
| Outside Diamater (D) | — | 580 mm |
| Total Width (B) | — | 243 mm |
| Basic Dynamic Load Rating, Radial (Cr) | — | 3,950,000 N |
| Basic Static Load Rating, Radial (C0R) | — | 7,700,000 N |
| Raceway Diameter Inner Ring (F) | — | 402 mm |
| Operating Temperature Min. (Tmin) | — | -30 °C |
| Limiting Speed For Grease Lubrication (Ng Grea) | — | 1,480 1/min |
| Minimum Diameter Shaft Shoulder (Da) | — | 360 mm |
| Limiting Speed (Ng Oil) | — | 1,740 1/min |
| Operating Temperature Max. (Tmax) | — | 150 °C |
| Maximum Diameter Of Housing Shoulder (Da) | — | 560 mm |
| Minimum Chamfer Dimension (R1 Min) | — | 5 mm |
| Shoulder Diameter Outer Ring (D1) | — | 502.5 mm |
| Axial Displacement (S) | — | 10.3 mm |
| Maximum Recess Radius (Ra1 Max) | — | 4 mm |
| Fatigue Load Limit, Radial (Cur) | — | 760,000 N |
| Temperature range | ||
| Operating temperature min.Tmin | — | -30 °C |
| Operating temperature min.Tmin | — | -22 °F |
| Operating temperature max.Tmax | — | 150 °C |
| Operating temperature max.Tmax | — | 302 °F |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.