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 | 31314 | |
| Bore diameter | d | 70 mm |
| Outside diameter | D | 150 mm |
| Width | B | 76 mm |
| Basic dynamic load rating | C | 400 kN |
| Basic static load rating | C0 | 435 kN |
| Fatigue load limit | Pu | 67 kN |
| Reference speed | nref | 3400 r/min |
| Limiting speed | nG | 5700 r/min |
| Mass | ≈m | 6.11 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 characteristics7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Tolerance class | PN | Normal (ISO 492:2023) |
| Heat treatment | Standard | |
| Cage | Standard | Sheet steel cage, window cage, roller-guided |
| Axial internal clearance | A0-45 | Axial internal clearance between 0 and 45 µm |
| Quality level | XL | X-life |
| Matched arrangement | F | X arrangement |
| Number of rows | 2 | Double-row design |
Main Dimensions & Performance Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 70 mm2.756 in |
| Outside diameter | D | 150 mm5.906 in |
| Inner ring total width | 2B | 70 mm2.756 in |
| Outer ring total width | 2T | 76 mm2.992 in |
| Basic dynamic load rating, radial | Cr | 400,000 N89,928.058 lbf |
| Basic static load rating, radial | C0r | 435,000 N97,796.763 lbf |
| Fatigue load limit, radial | Cur | 67,000 N15,062.95 lbf |
| Limiting speed | nG | 5,700 1/min |
| Thermal speed rating | nϑr | 3,400 1/min |
| Mass | ≈m | 6.11 kg13.47 lbs |
Mounting dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 84 mm3.307 in |
| Minimum diameter of housing shoulder | Da min | 118 mm4.646 in |
| Maximum diameter of housing shoulder | Da max | 138 mm5.433 in |
| Minimum axial space | Ca min | 5 mm0.197 in |
| Maximum fillet radius of housing | rb max | 2.5 mm0.098 in |
Dimensions2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 2.5 mm0.098 in |
| Width of spacer | A | 26 mm1.024 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 120 °C248 °F |
Calculation factors4 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 | Y1 | 0.82 |
| Dynamic axial load factor | Y2 | 1.22 |
| Static axial load factor | Y0 | 0.8 |
Capabilities & suitability6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Axial load capacity in both directions | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes |
Manufacturer Identity5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 2271670 | |
| Brand | FAG | |
| Base Type | 31314 | |
| X Life Marking | XL | |
| Base product | 2305091051 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Tapered roller bearing set 313..-DF, X-arrangement | |
| Short Description | Tapered roller bearing set |
Technical Data22 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 70 mm | |
| Outside Diameter (D) | 150 mm | |
| Width Of Bearing Outside (2T) | 76 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 400,000 N | |
| Basic Static Load Rating, Radial (C0R) | 435,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 5,700 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Reference Speed (Nϑr) | 3,400 1/min | |
| Maximum Fillet Radius Of Housing (Rb Max) | 2.5 mm | |
| Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M) | 2.5 mm | |
| Minimum Diameter Of Housing Shoulder (Da Min) | 118 mm | |
| Fatigue Load Limit, Radial (Cur) | 67,000 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) | 84 mm | |
| Dynamic Axial Load Factor (Y1) | 0.82 | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 138 mm | |
| Width Of Spacer (A) | 26 mm | |
| Dynamic Axial Load Factor (Y2) | 1.22 | |
| Width Of Bearing Inside (B4) | 70 mm | |
| Minimum Axial Space (Ca Min) | 5 mm | |
| Static Axial Load Factor (Y0) | 0.8 |