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| Parameter | FAGNNU4988-S-K-M-SP440 × 600 × 160 mm | KOYONNU4988440 × 600 × 160 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | FAG | KOYO |
| Designation | NNU4988-S-K-M-SP | NNU4988 |
| Product family | — | Single-row / NNU / Cylindrical bore |
| Detailed type | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | NNU4988 | — |
| Bore diameterd | 440 mm | 440 mm |
| Outside diameterD | 600 mm | 600 mm |
| WidthB | 160 mm | 160 mm |
| Basic dynamic load ratingC | 2040 kN | 2060 kN |
| Basic static load ratingC0 | 5200 kN | 5000 kN |
| Fatigue load limitPu | 530 kN | 477 kN |
| Limiting speednG | — | 660 r/min |
| Mass≈m | 128.54 kg | 133 kg |
| Precision class | SP — Tolerance class SP | — |
| Internal clearance | C1 (Group 1) — Internal clearance smaller than C2 | — |
| Cage | M — Brass Cage | — |
| 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 | — |
| 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 | 4 mm | — |
| Minimum chamfer dimensionr1 min | 0.157 in | — |
| Raceway diameter inner ringF | 490 mm | — |
| Raceway diameter inner ringF | 19.291 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 | 6.8 mm | — |
| Axial displacements | 0.268 in | — |
| Main Dimensions & Performance Data | ||
| Basic dynamic load rating, radialCr | 2,040,000 N | — |
| Basic dynamic load rating, radialCr | 458,633.094 lbf | — |
| Basic static load rating, radialC0r | 5,200,000 N | — |
| Basic static load rating, radialC0r | 1,169,064.748 lbf | — |
| Fatigue load limit, radialCur | 530,000 N | — |
| Fatigue load limit, radialCur | 119,154.676 lbf | — |
| Limiting speed for grease lubricationnG Grease | 1,150 1/min | — |
| Limiting speed for oil lubricationnG Oil | 1,360 1/min | — |
| Manufacturer Identity | ||
| Schaeffler Product Code | 374713 | — |
| Official Class Key | — | 040-020-020 |
| Base Type | NNU4988 | — |
| Gpsd Group | F07 | — |
| Product Line Id | 39 | — |
| SAP material number | 0192342360000 | — |
| Base product | 230509014C | — |
| Bearing X designation | NNU4988-S-K-M-SP | — |
| Mounting Manager ID | NNU4988-S-K-M-SP | — |
| Mounting dimensions | ||
| Diameter shaft shoulderda | 486.8 mm | — |
| Diameter shaft shoulderda | 19.165 in | — |
| Diameter shaft shoulder tolerance | h12 | — |
| Diameter of housing shoulderDa | 558 mm | — |
| Diameter of housing shoulderDa | 21.969 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 | ||
| 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 | — |
| Technical Data | ||
| d | — | 600 mm |
| B | — | 160 mm |
| Bore Diameter (D) | 440 mm | — |
| R(Min.) | — | 4 mm |
| Outside Diamater (D) | 600 mm | — |
| Fw | — | 487 mm |
| Total Width (B) | 160 mm | — |
| Ew | — | - mm |
| Basic Dynamic Load Rating, Radial (Cr) | 2,040,000 N | — |
| Basic Load Ratings : Cr | — | 2060 kN |
| Basic Static Load Rating, Radial (C0R) | 5,200,000 N | — |
| Basic Load Ratings : C0R | — | 5000 kN |
| Diameter Lubrication Hole (Ds) | 9.5 mm | — |
| Fatigue Load Limit : Cu | — | 477 kN |
| Raceway Diameter Inner Ring (F) | 490 mm | — |
| Limiting Speeds(Grease Lub.) | — | 660 min-1 |
| Operating Temperature Min. (Tmin) | -30 °C | — |
| Limiting Speeds(Oil Lub.) | — | 800 min-1 |
| Limiting Speed For Grease Lubrication (Ng Grea) | 1,150 1/min | — |
| Da(Min.) | — | - mm |
| Minimum Diameter Shaft Shoulder (Da) | 486.8 mm | — |
| Da(Max.) | — | 584 mm |
| Limiting Speed (Ng Oil) | 1,360 1/min | — |
| Db(Min.) | — | 492 mm |
| Operating Temperature Max. (Tmax) | 150 °C | — |
| Maximum Diameter Of Housing Shoulder (Da) | 558 mm | — |
| Ra(Max.) | — | 3 mm |
| Minimum Chamfer Dimension (R1 Min) | 4 mm | — |
| Mass(Refer.) | — | 133 kg |
| Width Of Lubricating Groove (Ns) | 17.7 mm | — |
| Axial Displacement (S) | 6.8 mm | — |
| Maximum Recess Radius (Ra1 Max) | 3 mm | — |
| Fatigue Load Limit, Radial (Cur) | 530,000 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.