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| Parameter | FAG30338190 × 400 × 86 mm | KOYO30338190 × 400 × 78 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | FAG | KOYO |
| Designation | 30338 | 30338 |
| Product family | — | Single-row / Metric series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Bore diameterd | 190 mm | 190 mm |
| Outside diameterD | 400 mm | 400 mm |
| WidthB | 86 mm | 78 mm |
| Basic dynamic load ratingC | 1210 kN | 1260 kN |
| Basic static load ratingC0 | 1600 kN | 1250 kN |
| Fatigue load limitPu | 143 kN | 139 kN |
| Reference speednref | 1180 r/min | — |
| Limiting speednG | 1800 r/min | 880 r/min |
| Mass≈m | 46.7 kg | 46.2 kg |
| Precision class | PN — Normal (ISO 492:2023) | — |
| Cage | Standard — Sheet steel cage, window cage, roller-guided | — |
| Minimum operating temperatureTmin | -30 °C | — |
| Maximum operating temperatureTmax | 200 °C | — |
| Calculation factors | ||
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Ye | 0.35 | — |
| Dynamic axial load factorY | 1.74 | — |
| Static axial load factorY0 | 0.96 | — |
| Capabilities & suitability | ||
| Radial load capacity | Yes | — |
| Axial load capacity in one direction | Yes | — |
| Suitable for grease lubrication | Yes | — |
| Suitable for oil lubrication | Yes | — |
| Unsealed design | Yes | — |
| Largebearing | Yes | — |
| Classification | ||
| Official Category Path | — | Tapered roller bearings - Single-row - Metric series |
| Official Classification 1 | — | Tapered roller bearings / Single-row / Metric series |
| Dimensions | ||
| Minimum chamfer dimension of inner ring back facer1, 2 min | 6 mm | — |
| Minimum chamfer dimension of inner ring back facer1, 2 min | 0.236 in | — |
| Minimum chamfer dimension of outer ring back facer3, 4 min | 5 mm | — |
| Minimum chamfer dimension of outer ring back facer3, 4 min | 0.197 in | — |
| Distance between the apexes of the pressure conesa | 72 mm | — |
| Distance between the apexes of the pressure conesa | 2.835 in | — |
| Guidance rib diameter of inner ringd1 | 279 mm | — |
| Guidance rib diameter of inner ringd1 | 10.984 in | — |
| Main Dimensions & Performance Data | ||
| Width, inner ringB | 78 mm | — |
| Width, inner ringB | 3.071 in | — |
| Width, outer ringC | 65 mm | — |
| Width, outer ringC | 2.559 in | — |
| Width, totalT | 86 mm | — |
| Width, totalT | 3.386 in | — |
| Basic dynamic load rating, radialCr | 1,210,000 N | — |
| Basic dynamic load rating, radialCr | 272,032.374 lbf | — |
| Basic static load rating, radialC0r | 1,600,000 N | — |
| Basic static load rating, radialC0r | 359,712.23 lbf | — |
| Fatigue load limit, radialCur | 143,000 N | — |
| Fatigue load limit, radialCur | 32,149.281 lbf | — |
| Thermal speed ratingnϑr | 1,180 1/min | — |
| Manufacturer Identity | ||
| Schaeffler Product Code | 1756940 | — |
| Official Class Key | — | 050-010-010 |
| Base Type | 30338 | — |
| Product Line Id | 70 | — |
| Base product | 2305091001 | — |
| Mounting dimensions | ||
| Maximum diameter of shaft shoulderda max | 240 mm | — |
| Maximum diameter of shaft shoulderda max | 9.449 in | — |
| Minimum diameter of shaft shoulderdb min | 210 mm | — |
| Minimum diameter of shaft shoulderdb min | 8.268 in | — |
| Minimum diameter of housing shoulderDa min | 341 mm | — |
| Minimum diameter of housing shoulderDa min | 13.425 in | — |
| Maximum diameter of housing shoulderDa max | 378 mm | — |
| Maximum diameter of housing shoulderDa max | 14.882 in | — |
| Minimum diameter of housing shoulderDb min | 364 mm | — |
| Minimum diameter of housing shoulderDb min | 14.331 in | — |
| Minimum axial spaceCa min | 10 mm | — |
| Minimum axial spaceCa min | 0.394 in | — |
| Minimum axial spaceCb min | 21 mm | — |
| Minimum axial spaceCb min | 0.827 in | — |
| Maximum fillet radius of shaftra max | 6 mm | — |
| Maximum fillet radius of shaftra max | 0.236 in | — |
| Maximum fillet radius of housingrb max | 5 mm | — |
| Maximum fillet radius of housingrb max | 0.197 in | — |
| Product characteristics | ||
| Tolerance classPN | Normal (ISO 492:2023) | — |
| Heat treatment | Standard | — |
| Internal design | Standard | — |
| Quality level | Standard | — |
| Number of rows1 | Single-row design | — |
| Product Identity | ||
| Construction | Tapered roller bearings 303, main dimensions acc. to DIN 720, separable | — |
| Short Description | Tapered roller bearing | — |
| Technical Data | ||
| d | — | 400 mm |
| Bore Diameter (D) | 190 mm | — |
| T | — | 86 mm |
| Outside Diameter (D) | 400 mm | — |
| B | — | 78 mm |
| Width (B) | 86 mm | — |
| C | — | 65 mm |
| Basic Dynamic Load Rating, Radial (Cr) | 1,210,000 N | — |
| R(Min.) | — | 6 mm |
| Basic Static Load Rating, Radial (C0R) | 1,600,000 N | — |
| R1(Min.) | — | 5 mm |
| Operating Temperature Min. (Tmin) | -30 °C | — |
| Basic Load Ratings : Cr | — | 1260 kN |
| Limiting Speed (Ng) | 1,800 1/min | — |
| Basic Load Ratings : C0R | — | 1250 kN |
| Operating Temperature Max. (Tmax) | 200 °C | — |
| Fatigue Load Limit : Cu | — | 139 kN |
| Reference Speed (Nϑr) | 1,180 1/min | — |
| Limiting Speeds(Grease Lub.) | — | 880 min-1 |
| Maximum Fillet Radius Of Housing (Rb Max) | 5 mm | — |
| Limiting Speeds(Oil Lub.) | — | 1200 min-1 |
| Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M) | 5 mm | — |
| Load Center Spread : A | — | 73.2 mm |
| Minimum Diameter Of Housing Shoulder (Da Min) | 341 mm | — |
| Constant E | — | 0.35 |
| Minimum Diameter Of Housing Shoulder (Db Min) | 364 mm | — |
| Axial Load Factors : Y1 | — | 1.73 |
| Width, Outer Ring (C) | 65 mm | — |
| Axial Load Factors : Y0 | — | 0.95 |
| Fatigue Load Limit, Radial (Cur) | 143,000 N | — |
| Da(Min.) | — | 342 mm |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.35 | — |
| Db(Max.) | — | 241 mm |
| Maximum Diameter Of Shaft Shoulder (Da Max) | 240 mm | — |
| Da(Max.) | — | 378 mm |
| Minimum Diameter Of Shaft Shoulder (Db Min) | 210 mm | — |
| Db(Min.) | — | 370 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | 378 mm | — |
| Sa(Min.) | — | 10 mm |
| Dynamic Axial Load Factor (Y) | 1.74 | — |
| Sb(Min.) | — | 20 mm |
| Maximum Fillet Radius (Ra Max) | 6 mm | — |
| Ra(Max.) | — | 5 mm |
| Minimum Axial Space (Cb Min) | 21 mm | — |
| Rb(Max.) | — | 4 mm |
| Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M) | 6 mm | — |
| Mass(Refer.) | — | 46.2 kg |
| Guidance Rib Diameter Of Inner Ring (D1) | 279 mm | — |
| Minimum Axial Space (Ca Min) | 10 mm | — |
| Width, Inner Ring (B) | 78 mm | — |
| Static Axial Load Factor (Y0) | 0.96 | — |
| Distance Between The Apexes Of The Pressure Cones (A) | 72 mm | — |
| Temperature range | ||
| Operating temperature min.Tmin | -30 °C | — |
| Operating temperature min.Tmin | -22 °F | — |
| Operating temperature max.Tmax | 200 °C | — |
| Operating temperature max.Tmax | 392 °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.