Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications14 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 31321 | |
| Bore diameter | d | 105 mm |
| Outside diameter | D | 225 mm |
| Width | B | 58 mm |
| Basic dynamic load rating | C | 510 kN |
| Basic static load rating | C0 | 510 kN |
| Fatigue load limit | Pu | 71 kN |
| Reference speed | nref | 2440 r/min |
| Limiting speed | nG | 3700 r/min |
| Mass | ≈m | 9.805 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Cage | Standard — Sheet steel cage, window cage, roller-guided | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 200 °C |
Product characteristics5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Tolerance class | PN | Normal (ISO 492:2023) |
| Heat treatment | Standard | |
| Cage | Standard | Sheet steel cage, window cage, roller-guided |
| Quality level | XL | X-life |
| Number of rows | 1 | Single-row design |
Main Dimensions & Performance Data11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 105 mm4.134 in |
| Outside diameter | D | 225 mm8.858 in |
| Width, inner ring | B | 53 mm2.087 in |
| Width, outer ring | C | 36 mm1.417 in |
| Width, total | T | 58 mm2.283 in |
| Basic dynamic load rating, radial | Cr | 510,000 N114,658.273 lbf |
| Basic static load rating, radial | C0r | 510,000 N114,658.273 lbf |
| Fatigue load limit, radial | Cur | 71,000 N15,962.23 lbf |
| Limiting speed | nG | 3,700 1/min |
| Thermal speed rating | nϑr | 2,440 1/min |
| Mass | ≈m | 9.805 kg21.616 lbs |
Mounting dimensions9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 127 mm5 in |
| Minimum diameter of shaft shoulder | db min | 119 mm4.685 in |
| Minimum diameter of housing shoulder | Da min | 176 mm6.929 in |
| Maximum diameter of housing shoulder | Da max | 211 mm8.307 in |
| Minimum diameter of housing shoulder | Db min | 211 mm8.307 in |
| Minimum axial space | Ca min | 7 mm0.276 in |
| Minimum axial space | Cb min | 22 mm0.866 in |
| Maximum fillet radius of shaft | ra max | 4 mm0.157 in |
| Maximum fillet radius of housing | rb max | 3 mm0.118 in |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 4 mm0.157 in |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 3 mm0.118 in |
| Distance between the apexes of the pressure cones | a | 70 mm2.756 in |
| Guidance rib diameter of inner ring | d1 | 161.9 mm6.374 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 200 °C392 °F |
Calculation factors3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y | e | 0.83 |
| Dynamic axial load factor | Y | 0.73 |
| Static axial load factor | Y0 | 0.4 |
Capabilities & suitability5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes |
Manufacturer Identity10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 383516 | |
| Brand | FAG | |
| Base Type | 31321 | |
| Old Designation | ["31321-X"] | |
| X Life Marking | XL | |
| SAP material number | 0789849200000 | |
| Base product | 2305091001 | |
| Bearing X designation | 31321-X-XL | |
| Mounting Manager ID | 31321-X-XL | |
| Grease application ID | 31321-X-XL |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Tapered roller bearings 313, main dimensions acc. to DIN 720, separable | |
| Short Description | Tapered roller bearing |
Additional information1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Comparative designation to ISO 10317 and ISO 355 | T7GB105 |
Technical Data28 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 105 mm | |
| Outside Diameter (D) | 225 mm | |
| Width (B) | 58 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 510,000 N | |
| Basic Static Load Rating, Radial (C0R) | 510,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 3,700 1/min | |
| Operating Temperature Max. (Tmax) | 200 °C | |
| Reference Speed (Nϑr) | 2,440 1/min | |
| Maximum Fillet Radius Of Housing (Rb Max) | 3 mm | |
| Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M) | 3 mm | |
| Minimum Diameter Of Housing Shoulder (Da Min) | 176 mm | |
| Minimum Diameter Of Housing Shoulder (Db Min) | 211 mm | |
| Width, Outer Ring (C) | 36 mm | |
| Fatigue Load Limit, Radial (Cur) | 71,000 N | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.83 | |
| Maximum Diameter Of Shaft Shoulder (Da Max) | 127 mm | |
| Minimum Diameter Of Shaft Shoulder (Db Min) | 119 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 211 mm | |
| Dynamic Axial Load Factor (Y) | 0.73 | |
| Maximum Fillet Radius (Ra Max) | 4 mm | |
| Minimum Axial Space (Cb Min) | 22 mm | |
| Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M) | 4 mm | |
| Guidance Rib Diameter Of Inner Ring (D1) | 161.9 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 |