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 | 23956 | |
| Bore diameter | d | 280 mm |
| Outside diameter | D | 380 mm |
| Width | B | 75 mm |
| Basic dynamic load rating | C | 970 kN |
| Basic static load rating | C0 | 2040 kN |
| Fatigue load limit | Pu | 133 kN |
| Reference speed | nref | 1100 r/min |
| Limiting speed | nG | 2000 r/min |
| Mass | ≈m | 23.93 kg |
| Internal clearance | C3 (Group 3) — Internal clearance larger than CN | |
| Cage | MB — Solid brass cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 200 °C |
Product characteristics4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore type | K | Tapered, taper 1:12 |
| Cage | MB | Solid brass cage |
| Radial internal clearance | C3 (Group 3) | Internal clearance larger than CN |
| Relubrication feature | Standard |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 280 mm11.024 in |
| Outside diameter | D | 380 mm14.961 in |
| Width | B | 75 mm2.953 in |
| Basic dynamic load rating, radial | Cr | 970,000 N218,075.54 lbf |
| Basic static load rating, radial | C0r | 2,040,000 N458,633.094 lbf |
| Fatigue load limit, radial | Cur | 133,000 N29,901.079 lbf |
| Limiting speed | nG | 2,000 1/min |
| Reference speed | nϑr | 1,100 1/min |
| Mass | ≈m | 23.93 kg52.757 lbs |
Mounting dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 290.2 mm11.425 in |
| Maximum diameter of housing shoulder | Da max | 369.8 mm14.559 in |
| Maximum recess radius | ra max | 2.1 mm0.083 in |
| Maximum diameter of shaft shoulder | da max | 303 mm11.929 in |
| Minimum cavity diameter of the sleeve | db min | 290 mm11.417 in |
| Minimum cavity width of the sleeve | Ba min | 12 mm0.472 in |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 2.1 mm0.083 in |
| Bore diameter outer ring | D1 | 350 mm13.78 in |
| Diameter lubrication hole | ds | 8 mm0.315 in |
| Width of lubricating groove | ns | 15 mm0.591 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 200 °C392 °F |
Calculation factors4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y | e | 0.18 |
| Dynamic axial load factor | Y1 | 3.76 |
| Dynamic axial load factor | Y2 | 5.59 |
| Static axial load factor | Y0 | 3.67 |
Capabilities & suitability9 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 | |
| Largebearing | Yes | |
| Staticangularerrorandmisalignment | Yes | |
| Dynamicangularerrorandmisalignment | Yes |
Manufacturer Identity7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 389997 | |
| Brand | FAG | |
| Base Type | 23956 | |
| Old Designation | ["23956K.MB.C3"] | |
| X Life Marking | n.r. | |
| SAP material number | 0190421240030 | |
| Base product | 2305091131 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spherical roller bearing 239..-K-MB, symmetric 3 ribs | |
| Short Description | Spherical Roller Bearing |
Additional information2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Adapter sleeve | H3956 | |
| Withdrawal sleeve | AH3956G |
Technical Data24 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 280 mm | |
| Outside Diamater (D) | 380 mm | |
| Total Width (B) | 75 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 970,000 N | |
| Basic Static Load Rating, Radial (C0R) | 2,040,000 N | |
| Diameter Lubrication Hole (Ds) | 8 mm | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Minimum Diameter Shaft Shoulder (Da) | 290.2 mm | |
| Operating Temperature Max. (Tmax) | 200 °C | |
| Limiting Speed (Limiting Spe) | 2,000 1/min | |
| Reference Speed (Nϑr) | 1,100 1/min | |
| Maximum Recess Radius (Ra Max) | 2.1 mm | |
| Maximum Diameter Of Housing Shoulder (Da) | 369.8 mm | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.18 | |
| Width Of Lubricating Groove (Ns) | 15 mm | |
| Dynamic Axial Load Factor (Y1) | 3.76 | |
| Bore Diameter Outer Ring (D1) | 350 mm | |
| Maximum Diameter Of Shaft Shoulder (Da Max) | 303 mm | |
| Minimum Chamfer Dimension (Rmin) | 2.1 mm | |
| Static Axial Load Factor (Y0) | 3.67 | |
| Dynamic Axial Load Factor (Y2) | 5.59 | |
| Minimum Cavity Width Of The Sleeve (Ba Min) | 12 mm | |
| Minimum Cavity Diameter Of The Sleeve (Db Min) | 290 mm | |
| Fatigue Load Limit, Radial (Cur) | 133,000 N |
