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 | 31305 | |
| Bore diameter | d | 25 mm |
| Outside diameter | D | 62 mm |
| Width | B | 18.25 mm |
| Basic dynamic load rating | C | 37 kN |
| Basic static load rating | C0 | 38.5 kN |
| Fatigue load limit | Pu | 4.5 kN |
| Reference speed | nref | 7100 r/min |
| Limiting speed | nG | 12000 r/min |
| Mass | ≈m | 0.267 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Cage | TVP — Cage made of glass-fiber reinforced plastic, window cage | |
| 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 | TVP | Cage made of glass-fiber reinforced plastic, window cage |
| Internal design | Standard | |
| Quality level | Standard | |
| Number of rows | 1 | Single-row design |
Main Dimensions & Performance Data11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 25 mm0.984 in |
| Outside diameter | D | 62 mm2.441 in |
| Width, inner ring | B | 17 mm0.669 in |
| Width, outer ring | C | 13 mm0.512 in |
| Width, total | T | 18.25 mm0.719 in |
| Basic dynamic load rating, radial | Cr | 37,000 N8,318.345 lbf |
| Basic static load rating, radial | C0r | 38,500 N8,655.576 lbf |
| Fatigue load limit, radial | Cur | 4,500 N1,011.691 lbf |
| Limiting speed | nG | 12,000 1/min |
| Thermal speed rating | nϑr | 7,100 1/min |
| Mass | ≈m | 0.267 kg0.589 lbs |
Mounting dimensions9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 34 mm1.339 in |
| Minimum diameter of shaft shoulder | db min | 32 mm1.26 in |
| Minimum diameter of housing shoulder | Da min | 47 mm1.85 in |
| Maximum diameter of housing shoulder | Da max | 55 mm2.165 in |
| Minimum diameter of housing shoulder | Db min | 59 mm2.323 in |
| Minimum axial space | Ca min | 3 mm0.118 in |
| Minimum axial space | Cb min | 5 mm0.197 in |
| Maximum fillet radius of shaft | ra max | 1.5 mm0.059 in |
| Maximum fillet radius of housing | rb max | 1.5 mm0.059 in |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 1.5 mm0.059 in |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 1.5 mm0.059 in |
| Distance between the apexes of the pressure cones | a | 20 mm0.787 in |
| Guidance rib diameter of inner ring | d1 | 46.3 mm1.823 in |
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 | 2268918 | |
| Brand | FAG | |
| Base Type | 31305 | |
| Base product | 2305091001 | |
| Mounting Manager ID | 31305-A-TVP | |
| Grease application ID | 31305-A-TVP |
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 | T7FB025 |
Technical Data28 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 25 mm | |
| Outside Diameter (D) | 62 mm | |
| Width (B) | 18.25 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 37,000 N | |
| Basic Static Load Rating, Radial (C0R) | 38,500 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 12,000 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Reference Speed (Nϑr) | 7,100 1/min | |
| Maximum Fillet Radius Of Housing (Rb Max) | 1.5 mm | |
| Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M) | 1.5 mm | |
| Minimum Diameter Of Housing Shoulder (Da Min) | 47 mm | |
| Minimum Diameter Of Housing Shoulder (Db Min) | 59 mm | |
| Width, Outer Ring (C) | 13 mm | |
| Fatigue Load Limit, Radial (Cur) | 4,500 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) | 34 mm | |
| Minimum Diameter Of Shaft Shoulder (Db Min) | 32 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 55 mm | |
| Dynamic Axial Load Factor (Y) | 0.73 | |
| Maximum Fillet Radius (Ra Max) | 1.5 mm | |
| Minimum Axial Space (Cb Min) | 5 mm | |
| Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M) | 1.5 mm | |
| Guidance Rib Diameter Of Inner Ring (D1) | 46.3 mm | |
| Minimum Axial Space (Ca Min) | 3 mm | |
| Width, Inner Ring (B) | 17 mm | |
| Static Axial Load Factor (Y0) | 0.4 | |
| Distance Between The Apexes Of The Pressure Cones (A) | 20 mm |
