Cross-brand designation analysis
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“NNU4940” 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 | SKFNNU 4940 B/SPW33200 × 280 × 80 mm | FAGNNU4940-S-K-M-SP200 × 280 × 80 mm | KOYONNU4940200 × 280 × 80 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | FAG | KOYO |
| Designation | NNU 4940 B/SPW33 | NNU4940-S-K-M-SP | NNU4940 |
| Product family | Super-precision cylindrical roller bearings | — | Single-row / NNU / Cylindrical bore |
| Detailed type | Super-precision double row cylindrical roller bearing with lubrication feature | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | — | NNU4940 | — |
| Bore diameterd | 200 mm | 200 mm | 200 mm |
| Outside diameterD | 280 mm | 280 mm | 280 mm |
| WidthB | 80 mm | 80 mm | 80 mm |
| Basic dynamic load ratingC | 484 kN | 490 kN | 636 kN |
| Basic static load ratingC0 | 1040 kN | 1040 kN | 1050 kN |
| Fatigue load limitPu | 106 kN | 125 kN | 125 kN |
| Limiting speednG | — | — | 1900 r/min |
| Mass≈m | 15.8 kg | 14.783 kg | 15.4 kg |
| Precision class | — | SP — Tolerance class SP | — |
| Internal clearance | C1 | C1 (Group 1) — Internal clearance smaller than C2 | — |
| Sealing | Without | — | — |
| Cage | Machined metal | 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 | — |
| Classification | |||
| Official Category Path | — | — | Cylindrical roller bearings - Single-row - NNU - Cylindrical bore |
| Official Classification 1 | — | — | Cylindrical roller bearings / Single-row / NNU / Cylindrical bore |
| Dimensions | |||
| Minimum chamfer dimensionr1 min | — | 2.1 mm | — |
| Minimum chamfer dimensionr1 min | — | 0.083 in | — |
| Raceway diameter inner ringF | — | 225 mm | — |
| Raceway diameter inner ringF | — | 8.858 in | — |
| Width of lubricating groovens | — | 12.2 mm | — |
| Width of lubricating groovens | — | 0.48 in | — |
| Diameter lubrication holeds | — | 6.3 mm | — |
| Diameter lubrication holeds | — | 0.248 in | — |
| Axial displacements | — | 4.3 mm | — |
| Axial displacements | — | 0.169 in | — |
| Engineering — Abutment dimensions | |||
| Abutment diameter shaftd a | min. 211 mm | — | — |
| Abutment diameter shaft (NNU design)d a | max. 222 mm | — | — |
| Abutment diameter shaft (NNU design; not for tapered bore)d b | min. 228 mm | — | — |
| Abutment diameter housingD a | max. 269 mm | — | — |
| Fillet radiusr a | max. 2 mm | — | — |
| Oil nozzle position (not for variants with TNHA cage)d n | 227 mm | — | — |
| Engineering — Calculation data | |||
| Attainable speed for grease lubrication | 2600.0 r/min | — | — |
| Attainable speed for oil-air lubrication | 3000.0 r/min | — | — |
| Reference grease quantityG ref | 117 cm³ | — | — |
| Static radial stiffness (guideline value) | 5480 N/µm | — | — |
| Engineering — Dimensions | |||
| Shoulder diameter outer ring (NNU design)D 1 | 252.2 mm | — | — |
| Raceway diameter inner ring (NNU design)F | 225 mm | — | — |
| Width annular lubrication groove at outer ringb | 11.1 mm | — | — |
| Diameter lubrication hole (outer ring)K | 3 mm | — | — |
| Chamfer dimension outer ringr 1,2 | min. 2.1 mm | — | — |
| Chamfer dimension inner ring (bearing with tapered bore)r 3,4 | min. 2.1 mm | — | — |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (all)s | max. 3.7 mm | — | — |
| Engineering — Engineering specifications | |||
| Bore type | Cylindrical | — | — |
| Logistics | |||
| Product net weight | 15.8 kg | — | — |
| eClass code | 23-05-09-01 | — | — |
| UNSPSC code | 31171505 | — | — |
| Main Dimensions & Performance Data | |||
| Basic dynamic load rating, radialCr | — | 490,000 N | — |
| Basic dynamic load rating, radialCr | — | 110,161.871 lbf | — |
| Basic static load rating, radialC0r | — | 1,040,000 N | — |
| Basic static load rating, radialC0r | — | 233,812.95 lbf | — |
| Fatigue load limit, radialCur | — | 125,000 N | — |
| Fatigue load limit, radialCur | — | 28,102.518 lbf | — |
| Limiting speed for grease lubricationnG Grease | — | 2,700 1/min | — |
| Limiting speed for oil lubricationnG Oil | — | 3,200 1/min | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 374518 | — |
| Official Class Key | — | — | 040-020-020 |
| Base Type | — | NNU4940 | — |
| Old Designation | — | ["NNU4940SK.M.SP"] | — |
| Gpsd Group | — | F07 | — |
| Product Line Id | — | 39 | — |
| SAP material number | — | 0192333960000 | — |
| Base product | — | 230509014C | — |
| Bearing X designation | — | NNU4940-S-K-M-SP | — |
| Mounting Manager ID | — | NNU4940-S-K-M-SP | — |
| Mounting dimensions | |||
| Diameter shaft shoulderda | — | 223 mm | — |
| Diameter shaft shoulderda | — | 8.78 in | — |
| Diameter shaft shoulder tolerance | — | h12 | — |
| Diameter of housing shoulderDa | — | 259 mm | — |
| Diameter of housing shoulderDa | — | 10.197 in | — |
| Diameter of housing shoulder tolerance | — | H12 | — |
| Maximum recess radiusra1 max | — | 2.1 mm | — |
| Maximum recess radiusra1 max | — | 0.083 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 | 58.5 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 280 mm |
| B | — | — | 80 mm |
| R(Min.) | — | — | 2.1 mm |
| Bore Diameter (D) | — | 200 mm | — |
| Fw | — | — | 223 mm |
| Outside Diamater (D) | — | 280 mm | — |
| Ew | — | — | - mm |
| Total Width (B) | — | 80 mm | — |
| Basic Load Ratings : Cr | — | — | 636 kN |
| Basic Dynamic Load Rating, Radial (Cr) | — | 490,000 N | — |
| Basic Load Ratings : C0R | — | — | 1050 kN |
| Basic Static Load Rating, Radial (C0R) | — | 1,040,000 N | — |
| Fatigue Load Limit : Cu | — | — | 125 kN |
| Diameter Lubrication Hole (Ds) | — | 6.3 mm | — |
| Limiting Speeds(Grease Lub.) | — | — | 1900 min-1 |
| Raceway Diameter Inner Ring (F) | — | 225 mm | — |
| Limiting Speeds(Oil Lub.) | — | — | 2300 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Da(Min.) | — | — | - mm |
| Limiting Speed For Grease Lubrication (Ng Grea) | — | 2,700 1/min | — |
| Da(Max.) | — | — | 269 mm |
| Minimum Diameter Shaft Shoulder (Da) | — | 223 mm | — |
| Db(Min.) | — | — | 228 mm |
| Limiting Speed (Ng Oil) | — | 3,200 1/min | — |
| Operating Temperature Max. (Tmax) | — | 150 °C | — |
| Ra(Max.) | — | — | 2 mm |
| Maximum Diameter Of Housing Shoulder (Da) | — | 259 mm | — |
| Mass(Refer.) | — | — | 15.4 kg |
| Minimum Chamfer Dimension (R1 Min) | — | 2.1 mm | — |
| Width Of Lubricating Groove (Ns) | — | 12.2 mm | — |
| Axial Displacement (S) | — | 4.3 mm | — |
| Maximum Recess Radius (Ra1 Max) | — | 2.1 mm | — |
| Fatigue Load Limit, Radial (Cur) | — | 125,000 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.