Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | R31311 | |
| Bore diameter | d | 55 mm |
| Basic dynamic load rating | C | 123 kN |
| Basic static load rating | C0 | 139 kN |
| Fatigue load limit | Pu | 16.4 kN |
| Reference speed | nref | 3950 r/min |
| Limiting speed | nG | 5900 r/min |
| Mass | ≈m | 1 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 | 120 °C |
Product characteristics6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Tolerance class | PN | Normal (ISO 492:2023) |
| Heat treatment | Standard | |
| Cage | Standard | Sheet steel cage, window cage, roller-guided |
| Internal design | Standard | |
| Quality level | Standard | |
| Number of rows | 1 | Single-row design |
Main Dimensions & Performance Data8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 55 mm2.165 in |
| Width, inner ring | B | 29 mm1.142 in |
| Basic dynamic load rating, radial | Cr | 123,000 N27,652.878 lbf |
| Basic static load rating, radial | C0r | 139,000 N31,250 lbf |
| Fatigue load limit, radial | Cur | 16,400 N3,687.05 lbf |
| Limiting speed | nG | 5,900 1/min |
| Thermal speed rating | nϑr | 3,950 1/min |
| Mass | ≈m | 1 kg2.205 lbs |
Mounting dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 68 mm2.677 in |
| Minimum diameter of shaft shoulder | db min | 65 mm2.559 in |
| Minimum axial space | CRa min | 6.5 mm0.256 in |
| Maximum axial space | CRb max | 0 mm0 in |
| Maximum fillet radius of shaft | ra max | 2.5 mm0.098 in |
Dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 2.5 mm0.098 in |
| Distance between the apexes of the pressure cones | a | 37 mm1.457 in |
| Guidance rib diameter of inner ring | d1 | 88 mm3.465 in |
| Outer envelope circle | Ew | 124.213 mm4.89 in |
| Contact angle | α | 28.811 ° |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 120 °C248 °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 Identity6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 2492619 | |
| Brand | FAG | |
| Base Type | R31311 | |
| SAP material number | 0970843950000 | |
| Base product | 2305091003 | |
| Mounting Manager ID | R31311-A |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Tapered roller bearings without outer ring (Cone) 313, main dimensions acc. to DIN 720 | |
| Short Description | Tapered roller bearing |
Additional information1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Comparative designation to ISO 10317 and ISO 355 | T7FB055 |
Technical Data21 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 55 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 123,000 N | |
| Basic Static Load Rating, Radial (C0R) | 139,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 5,900 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Reference Speed (Nϑr) | 3,950 1/min | |
| Contact Angle (Α) | 28.811 ° | |
| Fatigue Load Limit, Radial (Cur) | 16,400 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) | 68 mm | |
| Minimum Diameter Of Shaft Shoulder (Db Min) | 65 mm | |
| Dynamic Axial Load Factor (Y) | 0.73 | |
| Maximum Fillet Radius (Ra Max) | 2.5 mm | |
| Maximum Axial Space (Crb Max) | 0 mm | |
| Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M) | 2.5 mm | |
| Guidance Rib Diameter Of Inner Ring (D1) | 88 mm | |
| Minimum Axial Space (Cra Min) | 6.5 mm | |
| Width, Inner Ring (B) | 29 mm | |
| Static Axial Load Factor (Y0) | 0.4 | |
| Distance Between The Apexes Of The Pressure Cones (A) | 37 mm |
