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| Parameter | FAG31321-X105 × 225 × 58 mm | KOYO31321JR105 × 225 × 53 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | FAG | KOYO |
| Designation | 31321-X | 31321JR |
| Product family | — | Single-row / Metric series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 31321 | — |
| Bore diameterd | 105 mm | 105 mm |
| Outside diameterD | 225 mm | 225 mm |
| WidthB | 58 mm | 53 mm |
| Basic dynamic load ratingC | 410 kN | 495 kN |
| Basic static load ratingC0 | 510 kN | 489 kN |
| Fatigue load limitPu | 54 kN | 59.4 kN |
| Reference speednref | 2440 r/min | — |
| Limiting speednG | 3050 r/min | 1500 r/min |
| Mass≈m | 10 kg | 9.72 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 | — |
| Additional information | ||
| Comparative designation to ISO 10317 and ISO 355 | T7GB105 | — |
| Calculation factors | ||
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Ye | 0.83 | — |
| Dynamic axial load factorY | 0.73 | — |
| Static axial load factorY0 | 0.4 | — |
| 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 | — |
| 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 | 4 mm | — |
| Minimum chamfer dimension of inner ring back facer1, 2 min | 0.157 in | — |
| Minimum chamfer dimension of outer ring back facer3, 4 min | 3 mm | — |
| Minimum chamfer dimension of outer ring back facer3, 4 min | 0.118 in | — |
| Distance between the apexes of the pressure conesa | 70 mm | — |
| Distance between the apexes of the pressure conesa | 2.756 in | — |
| Guidance rib diameter of inner ringd1 | 165.3 mm | — |
| Guidance rib diameter of inner ringd1 | 6.508 in | — |
| Main Dimensions & Performance Data | ||
| Width, inner ringB | 53 mm | — |
| Width, inner ringB | 2.087 in | — |
| Width, outer ringC | 36 mm | — |
| Width, outer ringC | 1.417 in | — |
| Width, totalT | 58 mm | — |
| Width, totalT | 2.283 in | — |
| Basic dynamic load rating, radialCr | 410,000 N | — |
| Basic dynamic load rating, radialCr | 92,176.259 lbf | — |
| Basic static load rating, radialC0r | 510,000 N | — |
| Basic static load rating, radialC0r | 114,658.273 lbf | — |
| Fatigue load limit, radialCur | 54,000 N | — |
| Fatigue load limit, radialCur | 12,140.288 lbf | — |
| Thermal speed ratingnϑr | 2,440 1/min | — |
| Manufacturer Identity | ||
| Schaeffler Product Code | 2267962 | — |
| Official Class Key | — | 050-010-010 |
| Base Type | 31321 | — |
| Product Line Id | 70 | — |
| Base product | 2305091001 | — |
| Bearing X designation | 31321-X | — |
| Mounting Manager ID | 31321-X | — |
| Grease application ID | 31321-X | — |
| Mounting dimensions | ||
| Maximum diameter of shaft shoulderda max | 127 mm | — |
| Maximum diameter of shaft shoulderda max | 5 in | — |
| Minimum diameter of shaft shoulderdb min | 119 mm | — |
| Minimum diameter of shaft shoulderdb min | 4.685 in | — |
| Minimum diameter of housing shoulderDa min | 176 mm | — |
| Minimum diameter of housing shoulderDa min | 6.929 in | — |
| Maximum diameter of housing shoulderDa max | 211 mm | — |
| Maximum diameter of housing shoulderDa max | 8.307 in | — |
| Minimum diameter of housing shoulderDb min | 211 mm | — |
| Minimum diameter of housing shoulderDb min | 8.307 in | — |
| Minimum axial spaceCa min | 7 mm | — |
| Minimum axial spaceCa min | 0.276 in | — |
| Minimum axial spaceCb min | 22 mm | — |
| Minimum axial spaceCb min | 0.866 in | — |
| Maximum fillet radius of shaftra max | 4 mm | — |
| Maximum fillet radius of shaftra max | 0.157 in | — |
| Maximum fillet radius of housingrb max | 3 mm | — |
| Maximum fillet radius of housingrb max | 0.118 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 313, main dimensions acc. to DIN 720, separable | — |
| Short Description | Tapered roller bearing | — |
| Technical Data | ||
| d | — | 225 mm |
| Bore Diameter (D) | 105 mm | — |
| T | — | 58 mm |
| Outside Diameter (D) | 225 mm | — |
| B | — | 53 mm |
| Width (B) | 58 mm | — |
| C | — | 36 mm |
| Basic Dynamic Load Rating, Radial (Cr) | 410,000 N | — |
| R(Min.) | — | 4 mm |
| Basic Static Load Rating, Radial (C0R) | 510,000 N | — |
| R1(Min.) | — | 3 mm |
| Operating Temperature Min. (Tmin) | -30 °C | — |
| Basic Load Ratings : Cr | — | 495 kN |
| Limiting Speed (Ng) | 3,050 1/min | — |
| Basic Load Ratings : C0R | — | 489 kN |
| Operating Temperature Max. (Tmax) | 200 °C | — |
| Fatigue Load Limit : Cu | — | 59.4 kN |
| Reference Speed (Nϑr) | 2,440 1/min | — |
| Limiting Speeds(Grease Lub.) | — | 1500 min-1 |
| Maximum Fillet Radius Of Housing (Rb Max) | 3 mm | — |
| Limiting Speeds(Oil Lub.) | — | 2100 min-1 |
| Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M) | 3 mm | — |
| Load Center Spread : A | — | 70.3 mm |
| Minimum Diameter Of Housing Shoulder (Da Min) | 176 mm | — |
| Constant E | — | 0.83 |
| Minimum Diameter Of Housing Shoulder (Db Min) | 211 mm | — |
| Axial Load Factors : Y1 | — | 0.73 |
| Width, Outer Ring (C) | 36 mm | — |
| Axial Load Factors : Y0 | — | 0.40 |
| Fatigue Load Limit, Radial (Cur) | 54,000 N | — |
| Da(Min.) | — | 193 mm |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.83 | — |
| Db(Max.) | — | 126 mm |
| Maximum Diameter Of Shaft Shoulder (Da Max) | 127 mm | — |
| Da(Max.) | — | 211 mm |
| Minimum Diameter Of Shaft Shoulder (Db Min) | 119 mm | — |
| Db(Min.) | — | 211 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | 211 mm | — |
| Sa(Min.) | — | 6 mm |
| Dynamic Axial Load Factor (Y) | 0.73 | — |
| Sb(Min.) | — | 18 mm |
| Maximum Fillet Radius (Ra Max) | 4 mm | — |
| Ra(Max.) | — | 3 mm |
| Minimum Axial Space (Cb Min) | 22 mm | — |
| Rb(Max.) | — | 2.5 mm |
| Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M) | 4 mm | — |
| Mass(Refer.) | — | 9.72 kg |
| Guidance Rib Diameter Of Inner Ring (D1) | 165.3 mm | — |
| Minimum Axial Space (Ca Min) | 7 mm | — |
| Width, Inner Ring (B) | 53 mm | — |
| Static Axial Load Factor (Y0) | 0.4 | — |
| Distance Between The Apexes Of The Pressure Cones (A) | 70 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.