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 | 25.4 mm |
| Outside diameter | D | 56.896 mm |
| Width | B | 19.368 mm |
| Basic dynamic load rating | C | 43 kN |
| Basic static load rating | C0 | 46.5 kN |
| Fatigue load limit | Pu | 5.4 kN |
| Reference speed | nref | 9500 r/min |
| Limiting speed | nG | 14200 r/min |
| Mass | ≈m | 0.243 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 | 25.4 mm1 in |
| Outside diameter | D | 56.896 mm2.24 in |
| Width, inner ring | B | 19.837 mm0.781 in |
| Width, outer ring | C | 15.875 mm0.625 in |
| Width, total | T | 19.368 mm0.763 in |
| Basic dynamic load rating, radial | Cr | 43,000 N9,667.266 lbf |
| Basic static load rating, radial | C0r | 46,500 N10,454.137 lbf |
| Fatigue load limit, radial | Cur | 5,400 N1,214.029 lbf |
| Limiting speed | nG | 14,200 1/min |
| Thermal speed rating | nϑr | 9,500 1/min |
| Mass | ≈m | 0.243 kg0.536 lbs |
Mounting dimensions8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 30 mm1.181 in |
| Minimum diameter of shaft shoulder | db min | 30.5 mm1.201 in |
| Minimum diameter of housing shoulder | Da min | 49 mm1.929 in |
| Minimum diameter of housing shoulder | Db min | 51 mm2.008 in |
| Minimum axial space | Ca min | 2 mm0.079 in |
| Minimum axial space | Cb min | 3 mm0.118 in |
| Maximum fillet radius of shaft | ra max | 0.8 mm0.031 in |
| Maximum fillet radius of housing | rb max | 1.3 mm0.051 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 | 1.3 mm0.051 in |
| Distance between the apexes of the pressure cones | a | 13 mm0.512 in |
| Guidance rib diameter of inner ring | d1 | 39.9 mm1.571 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 | 0.31 |
| Dynamic axial load factor | Y | 1.95 |
| Static axial load factor | Y0 | 1.07 |
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 | 383868 | |
| Brand | FAG | |
| Base Type | K1780-1729 | |
| Old Designation | ["K1780.1729"] | |
| X Life Marking | n.r. | |
| SAP material number | 0572187810000 | |
| Base product | 2305091001 | |
| Bearing X designation | K1780-1729 | |
| Mounting Manager ID | K1780-1729 | |
| Grease application ID | K1780-1729 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Tapered roller bearings K-Series, in inch sizes, separable | |
| Short Description | Tapered roller bearing |
Technical Data27 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 25.4 mm | |
| Outside Diameter (D) | 56.896 mm | |
| Width (B) | 19.368 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 43,000 N | |
| Basic Static Load Rating, Radial (C0R) | 46,500 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 14,200 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Reference Speed (Nϑr) | 9,500 1/min | |
| Maximum Fillet Radius Of Housing (Rb Max) | 1.3 mm | |
| Minimum Chamfer Dimension Of Outer Ring Back Face (R3, 4 M) | 1.3 mm | |
| Minimum Diameter Of Housing Shoulder (Da Min) | 49 mm | |
| Minimum Diameter Of Housing Shoulder (Db Min) | 51 mm | |
| Width, Outer Ring (C) | 15.875 mm | |
| Fatigue Load Limit, Radial (Cur) | 5,400 N | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.31 | |
| Maximum Diameter Of Shaft Shoulder (Da Max) | 30 mm | |
| Minimum Diameter Of Shaft Shoulder (Db Min) | 30.5 mm | |
| Dynamic Axial Load Factor (Y) | 1.95 | |
| Maximum Fillet Radius (Ra Max) | 0.8 mm | |
| Minimum Axial Space (Cb Min) | 3 mm | |
| Minimum Chamfer Dimension Of Inner Ring Back Face (R1, 2 M) | 0.8 mm | |
| Guidance Rib Diameter Of Inner Ring (D1) | 39.9 mm | |
| Minimum Axial Space (Ca Min) | 2 mm | |
| Width, Inner Ring (B) | 19.837 mm | |
| Static Axial Load Factor (Y0) | 1.07 | |
| Distance Between The Apexes Of The Pressure Cones (A) | 13 mm |