Cross-brand designation analysis
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“NNU4992” 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 4992 BK/SPW33460 × 620 × 160 mm | FAGNNU4992-S-K-M-SP460 × 620 × 160 mm | KOYONNU4992460 × 620 × 160 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | FAG | KOYO |
| Designation | NNU 4992 BK/SPW33 | NNU4992-S-K-M-SP | NNU4992 |
| Product family | Super-precision cylindrical roller bearings | — | Single-row / NNU / Cylindrical bore |
| Detailed type | Super-precision double row cylindrical roller bearing with tapered bore and lubrication feature | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | — | NNU4992 | — |
| Bore diameterd | 460 mm | 460 mm | 460 mm |
| Outside diameterD | 620 mm | 620 mm | 620 mm |
| WidthB | 160 mm | 160 mm | 160 mm |
| Basic dynamic load ratingC | 2090 kN | 2110 kN | 2250 kN |
| Basic static load ratingC0 | 5500 kN | 5500 kN | 5440 kN |
| Fatigue load limitPu | 465 kN | 560 kN | 516 kN |
| Limiting speednG | — | — | 630 r/min |
| Mass≈m | 136 kg | 132.6 kg | 136 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 | — |
| 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 | — | 510 mm | — |
| Raceway diameter inner ringF | — | 20.079 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 | — |
| Engineering — Abutment dimensions | |||
| Abutment diameter shaftd a | min. 475 mm | — | — |
| Abutment diameter shaft (NNU design)d a | max. 504 mm | — | — |
| Abutment diameter housingD a | max. 605 mm | — | — |
| Fillet radiusr a | max. 3 mm | — | — |
| Engineering — Calculation data | |||
| Attainable speed for grease lubrication | 1000.0 r/min | — | — |
| Attainable speed for oil-air lubrication | 950.0 r/min | — | — |
| Engineering — Dimensions | |||
| Shoulder diameter outer ring (NNU design)D 1 | 567 mm | — | — |
| Raceway diameter inner ring (NNU design)F | 510 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. 2 mm | — | — |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (all)s | max. 3.2 mm | — | — |
| Engineering — Engineering specifications | |||
| Bore type | Tapered 1:12 | — | — |
| Logistics | |||
| Product net weight | 136.0 kg | — | — |
| eClass code | 23-05-09-01 | — | — |
| UNSPSC code | 31171505 | — | — |
| Main Dimensions & Performance Data | |||
| Basic dynamic load rating, radialCr | — | 2,110,000 N | — |
| Basic dynamic load rating, radialCr | — | 474,370.504 lbf | — |
| Basic static load rating, radialC0r | — | 5,500,000 N | — |
| Basic static load rating, radialC0r | — | 1,236,510.791 lbf | — |
| Fatigue load limit, radialCur | — | 560,000 N | — |
| Fatigue load limit, radialCur | — | 125,899.281 lbf | — |
| Limiting speed for grease lubricationnG Grease | — | 1,120 1/min | — |
| Limiting speed for oil lubricationnG Oil | — | 1,320 1/min | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 374716 | — |
| Official Class Key | — | — | 040-020-020 |
| Base Type | — | NNU4992 | — |
| Gpsd Group | — | F07 | — |
| Product Line Id | — | 39 | — |
| SAP material number | — | 0192342520000 | — |
| Base product | — | 230509014C | — |
| Bearing X designation | — | NNU4992-S-K-M-SP | — |
| Mounting Manager ID | — | NNU4992-S-K-M-SP | — |
| Mounting dimensions | |||
| Diameter shaft shoulderda | — | 506.8 mm | — |
| Diameter shaft shoulderda | — | 19.953 in | — |
| Diameter shaft shoulder tolerance | — | h12 | — |
| Diameter of housing shoulderDa | — | 578 mm | — |
| Diameter of housing shoulderDa | — | 22.756 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 | 503.0 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 620 mm |
| B | — | — | 160 mm |
| Bore Diameter (D) | — | 460 mm | — |
| R(Min.) | — | — | 4 mm |
| Outside Diamater (D) | — | 620 mm | — |
| Fw | — | — | 502 mm |
| Total Width (B) | — | 160 mm | — |
| Ew | — | — | - mm |
| Basic Dynamic Load Rating, Radial (Cr) | — | 2,110,000 N | — |
| Basic Load Ratings : Cr | — | — | 2250 kN |
| Basic Static Load Rating, Radial (C0R) | — | 5,500,000 N | — |
| Basic Load Ratings : C0R | — | — | 5440 kN |
| Diameter Lubrication Hole (Ds) | — | 9.5 mm | — |
| Fatigue Load Limit : Cu | — | — | 516 kN |
| Raceway Diameter Inner Ring (F) | — | 510 mm | — |
| Limiting Speeds(Grease Lub.) | — | — | 630 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Limiting Speeds(Oil Lub.) | — | — | 760 min-1 |
| Limiting Speed For Grease Lubrication (Ng Grea) | — | 1,120 1/min | — |
| Da(Min.) | — | — | - mm |
| Minimum Diameter Shaft Shoulder (Da) | — | 506.8 mm | — |
| Da(Max.) | — | — | 604 mm |
| Limiting Speed (Ng Oil) | — | 1,320 1/min | — |
| Db(Min.) | — | — | 507 mm |
| Operating Temperature Max. (Tmax) | — | 150 °C | — |
| Maximum Diameter Of Housing Shoulder (Da) | — | 578 mm | — |
| Ra(Max.) | — | — | 3 mm |
| Minimum Chamfer Dimension (R1 Min) | — | 4 mm | — |
| Mass(Refer.) | — | — | 136 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) | — | 560,000 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.