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| Parameter | SKFNNU 49/500 BK/SPW33X500 × 670 × 170 mm | FAGNNU49/500-S-K-M-SP500 × 670 × 170 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | FAG |
| Designation | NNU 49/500 BK/SPW33X | NNU49/500-S-K-M-SP |
| Product family | Super-precision cylindrical roller bearings | — |
| Detailed type | Super-precision double row cylindrical roller bearing with tapered bore and lubrication feature | Cylindrical roller bearings |
| Series | — | NNU49/500 |
| Bore diameterd | 500 mm | 500 mm |
| Outside diameterD | 670 mm | 670 mm |
| WidthB | 170 mm | 170 mm |
| Basic dynamic load ratingC | 2330 kN | 2330 kN |
| Basic static load ratingC0 | 6100 kN | 6100 kN |
| Fatigue load limitPu | 490 kN | 600 kN |
| Mass≈m | 165 kg | 161.23 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 |
| Largebearing | — | Yes |
| Dimensions | ||
| Minimum chamfer dimensionr1 min | — | 5 mm |
| Minimum chamfer dimensionr1 min | — | 0.197 in |
| Raceway diameter inner ringF | — | 554 mm |
| Raceway diameter inner ringF | — | 21.811 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. 548 mm | — |
| Abutment diameter shaft (NNU design)d a | max. 548 mm | — |
| Abutment diameter housingD a | max. 652 mm | — |
| Fillet radiusr a | max. 4 mm | — |
| Engineering — Calculation data | ||
| Attainable speed for grease lubrication | 950.0 r/min | — |
| Attainable speed for oil-air lubrication | 1100.0 r/min | — |
| Engineering — Dimensions | ||
| Shoulder diameter outer ring (NNU design)D 1 | 611.6 mm | — |
| Raceway diameter inner ring (NNU design)F | 554 mm | — |
| Width annular lubrication groove at outer ringb | 22.3 mm | — |
| Diameter lubrication hole (outer ring)K | 12 mm | — |
| Chamfer dimension outer ringr 1,2 | min. 5 mm | — |
| Chamfer dimension inner ring (bearing with tapered bore)r 3,4 | min. 9.8 mm | — |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (all)s | max. 3.5 mm | — |
| Engineering — Engineering specifications | ||
| Bore type | Tapered 1:12 | — |
| Logistics | ||
| Product net weight | 165.0 kg | — |
| eClass code | 23-05-09-01 | — |
| UNSPSC code | 31171505 | — |
| Main Dimensions & Performance Data | ||
| Basic dynamic load rating, radialCr | — | 2,330,000 N |
| Basic dynamic load rating, radialCr | — | 523,830.935 lbf |
| Basic static load rating, radialC0r | — | 6,100,000 N |
| Basic static load rating, radialC0r | — | 1,371,402.878 lbf |
| Fatigue load limit, radialCur | — | 600,000 N |
| Fatigue load limit, radialCur | — | 134,892.086 lbf |
| Limiting speed for grease lubricationnG Grease | — | 1,030 1/min |
| Limiting speed for oil lubricationnG Oil | — | 1,220 1/min |
| Manufacturer Identity | ||
| Schaeffler Product Code | — | 374600 |
| Base Type | — | NNU49/500 |
| Gpsd Group | — | F07 |
| Product Line Id | — | 39 |
| SAP material number | — | 0192325000000 |
| Base product | — | 230509014C |
| Bearing X designation | — | NNU49/500-S-K-M-SP |
| Mounting Manager ID | — | NNU49/500-S-K-M-SP |
| Mounting dimensions | ||
| Diameter shaft shoulderda | — | 550.6 mm |
| Diameter shaft shoulderda | — | 21.677 in |
| Diameter shaft shoulder tolerance | — | h12 |
| Diameter of housing shoulderDa | — | 626 mm |
| Diameter of housing shoulderDa | — | 24.646 in |
| Diameter of housing shoulder tolerance | — | H12 |
| Maximum recess radiusra1 max | — | 4 mm |
| Maximum recess radiusra1 max | — | 0.157 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 | 611.0 kg CO 2 e | — |
| Technical Data | ||
| Bore Diameter (D) | — | 500 mm |
| Outside Diamater (D) | — | 670 mm |
| Total Width (B) | — | 170 mm |
| Basic Dynamic Load Rating, Radial (Cr) | — | 2,330,000 N |
| Basic Static Load Rating, Radial (C0R) | — | 6,100,000 N |
| Diameter Lubrication Hole (Ds) | — | 9.5 mm |
| Raceway Diameter Inner Ring (F) | — | 554 mm |
| Operating Temperature Min. (Tmin) | — | -30 °C |
| Limiting Speed For Grease Lubrication (Ng Grea) | — | 1,030 1/min |
| Minimum Diameter Shaft Shoulder (Da) | — | 550.6 mm |
| Limiting Speed (Ng Oil) | — | 1,220 1/min |
| Operating Temperature Max. (Tmax) | — | 150 °C |
| Maximum Diameter Of Housing Shoulder (Da) | — | 626 mm |
| Minimum Chamfer Dimension (R1 Min) | — | 5 mm |
| Width Of Lubricating Groove (Ns) | — | 17.7 mm |
| Axial Displacement (S) | — | 7.2 mm |
| Maximum Recess Radius (Ra1 Max) | — | 4 mm |
| Fatigue Load Limit, Radial (Cur) | — | 600,000 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 |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.