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 | 238/670 | |
| Bore diameter | d | 670 mm |
| Outside diameter | D | 820 mm |
| Width | B | 112 mm |
| Basic dynamic load rating | C | 2380 kN |
| Basic static load rating | C0 | 6900 kN |
| Fatigue load limit | Pu | 460 kN |
| Reference speed | nref | 380 r/min |
| Limiting speed | nG | 810 r/min |
| Mass | ≈m | 129 kg |
| Internal clearance | CN (Group N) — Normal internal clearance | |
| Cage | MB — Solid brass cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 200 °C |
Product characteristics5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Design | B | With fixed central rib |
| Bore type | Z | Cylindrical |
| Cage | MB | Solid brass cage |
| Radial internal clearance | CN (Group N) | Normal internal clearance |
| Relubrication feature | Standard |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 670 mm26.378 in |
| Outside diameter | D | 820 mm32.283 in |
| Width | B | 112 mm4.409 in |
| Basic dynamic load rating, radial | Cr | 2,380,000 N535,071.942 lbf |
| Basic static load rating, radial | C0r | 6,900,000 N1,551,258.993 lbf |
| Fatigue load limit, radial | Cur | 460,000 N103,417.266 lbf |
| Limiting speed | nG | 810 1/min |
| Reference speed | nϑr | 380 1/min |
| Mass | ≈m | 129 kg284.396 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 684.6 mm26.953 in |
| Maximum diameter of housing shoulder | Da max | 805.4 mm31.709 in |
| Maximum recess radius | ra max | 3 mm0.118 in |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 4 mm0.157 in |
| Bore diameter outer ring | D1 | 777.2 mm30.598 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 | 0.12 |
| Dynamic axial load factor | Y1 | 5.72 |
| Dynamic axial load factor | Y2 | 8.51 |
| Static axial load factor | Y0 | 5.59 |
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 Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 389817 | |
| Brand | FAG | |
| Base Type | 238/670 | |
| Old Designation | ["238/670B.MB"] | |
| X Life Marking | n.r. | |
| SAP material number | 0190394330000 | |
| Base product | 2305091131 | |
| Bearing X designation | 238/670-B-MB | |
| Mounting Manager ID | 238/670-B-MB |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spherical roller bearing 238..-B-MB, symmetric 3 ribs | |
| Short Description | Spherical Roller Bearing |
Technical Data21 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 670 mm | |
| Outside Diamater (D) | 820 mm | |
| Total Width (B) | 112 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 2,380,000 N | |
| Basic Static Load Rating, Radial (C0R) | 6,900,000 N | |
| Diameter Lubrication Hole (Ds) | 8 mm | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Minimum Diameter Shaft Shoulder (Da) | 684.6 mm | |
| Operating Temperature Max. (Tmax) | 200 °C | |
| Limiting Speed (Limiting Spe) | 810 1/min | |
| Reference Speed (Nϑr) | 380 1/min | |
| Maximum Recess Radius (Ra Max) | 3 mm | |
| Maximum Diameter Of Housing Shoulder (Da) | 805.4 mm | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.12 | |
| Width Of Lubricating Groove (Ns) | 15 mm | |
| Dynamic Axial Load Factor (Y1) | 5.72 | |
| Bore Diameter Outer Ring (D1) | 777.2 mm | |
| Minimum Chamfer Dimension (Rmin) | 4 mm | |
| Static Axial Load Factor (Y0) | 5.59 | |
| Dynamic Axial Load Factor (Y2) | 8.51 | |
| Fatigue Load Limit, Radial (Cur) | 460,000 N |
