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
“NNU4980” 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 4980 B/SPW33400 × 540 × 140 mm | FAGNNU4980-S-K-M-SP400 × 540 × 140 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | FAG |
| Designation | NNU 4980 B/SPW33 | NNU4980-S-K-M-SP |
| Product family | Super-precision cylindrical roller bearings | — |
| Detailed type | Super-precision double row cylindrical roller bearing with lubrication feature | Cylindrical roller bearings |
| Series | — | NNU4980 |
| Bore diameterd | 400 mm | 400 mm |
| Outside diameterD | 540 mm | 540 mm |
| WidthB | 140 mm | 140 mm |
| Basic dynamic load ratingC | 1470 kN | 1490 kN |
| Basic static load ratingC0 | 3800 kN | 3800 kN |
| Fatigue load limitPu | 335 kN | 390 kN |
| Mass≈m | 92.5 kg | 89.11 kg |
| Precision class | — | SP — Tolerance class SP |
| Internal clearance | C1 | C1 (Group 1) — Internal clearance smaller than C2 |
| Sealing | Without | — |
| Cage | — | M — Brass Cage |
| Bearing material | Bearing steel | — |
| Lubricant | None | — |
| Minimum operating temperatureTmin | — | -30 °C |
| Maximum operating temperatureTmax | — | 150 °C |
| Capabilities & suitability | ||
| Radial load capacity | — | Yes |
| Suitable for grease lubrication | — | Yes |
| Suitable for oil lubrication | — | Yes |
| Unsealed design | — | Yes |
| Largebearing | — | Yes |
| Dimensions | ||
| Minimum chamfer dimensionr1 min | — | 4 mm |
| Minimum chamfer dimensionr1 min | — | 0.157 in |
| Raceway diameter inner ringF | — | 446 mm |
| Raceway diameter inner ringF | — | 17.559 in |
| Width of lubricating groovens | — | 17.7 mm |
| Width of lubricating groovens | — | 0.697 in |
| Diameter lubrication holeds | — | 9.5 mm |
| Diameter lubrication holeds | — | 0.374 in |
| Axial displacements | — | 7.2 mm |
| Axial displacements | — | 0.283 in |
| Engineering — Abutment dimensions | ||
| Abutment diameter shaftd a | min. 415 mm | — |
| Abutment diameter shaft (NNU design)d a | max. 441 mm | — |
| Abutment diameter shaft (NNU design; not for tapered bore)d b | min. 451 mm | — |
| Abutment diameter housingD a | max. 524 mm | — |
| Fillet radiusr a | max. 3 mm | — |
| Oil nozzle position (not for variants with TNHA cage)d n | 448.8 mm | — |
| Engineering — Calculation data | ||
| Attainable speed for grease lubrication | 1300.0 r/min | — |
| Attainable speed for oil-air lubrication | 1500.0 r/min | — |
| Engineering — Dimensions | ||
| Shoulder diameter outer ring (NNU design)D 1 | 490.8 mm | — |
| Raceway diameter inner ring (NNU design)F | 446 mm | — |
| Width annular lubrication groove at outer ringb | 16.7 mm | — |
| Diameter lubrication hole (outer ring)K | 9 mm | — |
| Chamfer dimension outer ringr 1,2 | min. 4 mm | — |
| Chamfer dimension inner ring (bearing with tapered bore)r 3,4 | min. 4 mm | — |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (all)s | max. 5.5 mm | — |
| Engineering — Engineering specifications | ||
| Bore type | Cylindrical | — |
| Logistics | ||
| Product net weight | 92.5 kg | — |
| eClass code | 23-05-09-01 | — |
| UNSPSC code | 31171505 | — |
| Main Dimensions & Performance Data | ||
| Basic dynamic load rating, radialCr | — | 1,490,000 N |
| Basic dynamic load rating, radialCr | — | 334,982.014 lbf |
| Basic static load rating, radialC0r | — | 3,800,000 N |
| Basic static load rating, radialC0r | — | 854,316.547 lbf |
| Fatigue load limit, radialCur | — | 390,000 N |
| Fatigue load limit, radialCur | — | 87,679.856 lbf |
| Limiting speed for grease lubricationnG Grease | — | 1,330 1/min |
| Limiting speed for oil lubricationnG Oil | — | 1,570 1/min |
| Manufacturer Identity | ||
| Schaeffler Product Code | — | 374706 |
| Base Type | — | NNU4980 |
| Gpsd Group | — | F07 |
| Product Line Id | — | 39 |
| SAP material number | — | 0192341470000 |
| Base product | — | 230509014C |
| Bearing X designation | — | NNU4980-S-K-M-SP |
| Mounting Manager ID | — | NNU4980-S-K-M-SP |
| Mounting dimensions | ||
| Diameter shaft shoulderda | — | 442.6 mm |
| Diameter shaft shoulderda | — | 17.425 in |
| Diameter shaft shoulder tolerance | — | h12 |
| Diameter of housing shoulderDa | — | 502 mm |
| Diameter of housing shoulderDa | — | 19.764 in |
| Diameter of housing shoulder tolerance | — | H12 |
| Maximum recess radiusra1 max | — | 3 mm |
| Maximum recess radiusra1 max | — | 0.118 in |
| Product characteristics | ||
| Tolerance classSP | — | Tolerance class SP |
| Bore typeK | — | Tapered, taper 1:12 |
| Locating Feature , bearing outer ringS | — | Lubrication holes and lubrication groove in outer ring |
| Radial internal clearanceC1 (Group 1) | — | Internal clearance smaller than C2 |
| Number of rows2 | — | Double-row design |
| Product identity | ||
| Official product category | Super-precision cylindrical roller bearings | — |
| Official taxonomy path | /products/super-precision-bearings/cylindrical-roller-bearings | — |
| Structure group ID | BC2_010 | — |
| Available from SKF | Yes | — |
| Remanufacturable | No | — |
| Product Identity | ||
| Construction | — | Super precision cylindrical roller bearings NNU49..-S-K-M-SP, non-locating bearing, double row, with tapered bore, taper 1:12, separable, with cage |
| Short Description | — | Cylindrical roller bearing |
| Properties | ||
| Bearing part | Complete bearing | — |
| Number of rows | 2 | — |
| Design | NNU | — |
| Number of flanges, outer ring | 3 | — |
| Number of flanges, inner ring | 0 | — |
| Loose flange | None | — |
| Radial internal clearance | C1 | — |
| Tolerance class | Class SP (SP) | — |
| Material, bearing | Bearing steel | — |
| Coating | Without | — |
| Relubrication feature | Annular groove and lubrication holes | — |
| Indicative carbon footprint for new product | 342.0 kg CO 2 e | — |
| Technical Data | ||
| Bore Diameter (D) | — | 400 mm |
| Outside Diamater (D) | — | 540 mm |
| Total Width (B) | — | 140 mm |
| Basic Dynamic Load Rating, Radial (Cr) | — | 1,490,000 N |
| Basic Static Load Rating, Radial (C0R) | — | 3,800,000 N |
| Diameter Lubrication Hole (Ds) | — | 9.5 mm |
| Raceway Diameter Inner Ring (F) | — | 446 mm |
| Operating Temperature Min. (Tmin) | — | -30 °C |
| Limiting Speed For Grease Lubrication (Ng Grea) | — | 1,330 1/min |
| Minimum Diameter Shaft Shoulder (Da) | — | 442.6 mm |
| Limiting Speed (Ng Oil) | — | 1,570 1/min |
| Operating Temperature Max. (Tmax) | — | 150 °C |
| Maximum Diameter Of Housing Shoulder (Da) | — | 502 mm |
| Minimum Chamfer Dimension (R1 Min) | — | 4 mm |
| Width Of Lubricating Groove (Ns) | — | 17.7 mm |
| Axial Displacement (S) | — | 7.2 mm |
| Maximum Recess Radius (Ra1 Max) | — | 3 mm |
| Fatigue Load Limit, Radial (Cur) | — | 390,000 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.