Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications13 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 38.1 mm |
| Outside diameter | D | 82.931 mm |
| Width | B | 23.812 mm |
| Basic dynamic load rating | C | 81 kN |
| Basic static load rating | C0 | 105 kN |
| Fatigue load limit | Pu | 13.2 kN |
| Reference speed | nref | 5400 r/min |
| Limiting speed | nG | 8900 r/min |
| Mass | ≈m | 0.66 kg |
| Precision class | ABMA4 — Class 4 (ANSI/ABMA 19.2:2013) | |
| Cage | Standard — Sheet steel cage, window cage, roller-guided | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 120 °C |
Product characteristics5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Tolerance class | ABMA4 | Class 4 (ANSI/ABMA 19.2:2013) |
| Heat treatment | Standard | |
| Cage | Standard | Sheet steel cage, window cage, roller-guided |
| Quality level | Standard | |
| Number of rows | 1 | Single-row design |
Main Dimensions & Performance Data11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 38.1 mm1.5 in |
| Outside diameter | D | 82.931 mm3.265 in |
| Width, inner ring | B | 25.4 mm1 in |
| Width, outer ring | C | 19.05 mm0.75 in |
| Width, total | T | 23.812 mm0.937 in |
| Basic dynamic load rating, radial | Cr | 81,000 N18,210.432 lbf |
| Basic static load rating, radial | C0r | 105,000 N23,606.115 lbf |
| Fatigue load limit, radial | Cur | 13,200 N2,967.626 lbf |
| Limiting speed | nG | 8,900 1/min |
| Thermal speed rating | nϑr | 5,400 1/min |
| Mass | ≈m | 0.66 kg1.455 lbs |
Mounting dimensions9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 52 mm2.047 in |
| Minimum diameter of shaft shoulder | db min | 55 mm2.165 in |
| Minimum diameter of housing shoulder | Da min | 71 mm2.795 in |
| Maximum diameter of housing shoulder | Da max | 77 mm3.031 in |
| Minimum diameter of housing shoulder | Db min | 76 mm2.992 in |
| Minimum axial space | Ca min | 4.5 mm0.177 in |
| Minimum axial space | Cb min | 4.5 mm0.177 in |
| Maximum fillet radius of shaft | ra max | 0.8 mm0.031 in |
| Maximum fillet radius of housing | rb max | 0.8 mm0.031 in |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 0.8 mm0.031 in |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 0.8 mm0.031 in |
| Distance between the apexes of the pressure cones | a | 17.5 mm0.689 in |
| Guidance rib diameter of inner ring | d1 | 63.7 mm2.508 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 | 0.33 |
| Dynamic axial load factor | Y | 1.79 |
| Static axial load factor | Y0 | 0.99 |
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 | 383876 | |
| Brand | FAG | |
| Base Type | K25572-25520 | |
| Old Designation | ["K25572.25520"] | |
| X Life Marking | n.r. | |
| SAP material number | 0655817090000 | |
| Base product | 2305091001 | |
| Bearing X designation | K25572-25520 | |
| Mounting Manager ID | K25572-25520 | |
| Grease application ID | K25572-25520 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Tapered roller bearings K-Series, in inch sizes, separable | |
| Short Description | Tapered roller bearing |
Technical Data28 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 38.1 mm | |
| Outside Diameter (D) | 82.931 mm | |
| Width (B) | 23.812 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 81,000 N | |
| Basic Static Load Rating, Radial (C0R) | 105,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 8,900 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Reference Speed (Nϑr) | 5,400 1/min | |
| Maximum Fillet Radius Of Housing (Rb Max) | 0.8 mm | |
| Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M) | 0.8 mm | |
| Minimum Diameter Of Housing Shoulder (Da Min) | 71 mm | |
| Minimum Diameter Of Housing Shoulder (Db Min) | 76 mm | |
| Width, Outer Ring (C) | 19.05 mm | |
| Fatigue Load Limit, Radial (Cur) | 13,200 N | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.33 | |
| Maximum Diameter Of Shaft Shoulder (Da Max) | 52 mm | |
| Minimum Diameter Of Shaft Shoulder (Db Min) | 55 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 77 mm | |
| Dynamic Axial Load Factor (Y) | 1.79 | |
| Maximum Fillet Radius (Ra Max) | 0.8 mm | |
| Minimum Axial Space (Cb Min) | 4.5 mm | |
| Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M) | 0.8 mm | |
| Guidance Rib Diameter Of Inner Ring (D1) | 63.7 mm | |
| Minimum Axial Space (Ca Min) | 4.5 mm | |
| Width, Inner Ring (B) | 25.4 mm | |
| Static Axial Load Factor (Y0) | 0.99 | |
| Distance Between The Apexes Of The Pressure Cones (A) | 17.5 mm |