Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
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One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Dimensions differ
“31321” across 2 loaded brands
The base designation is shared, but the loaded boundary dimensions do not agree. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| 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 | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.