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 |
|---|---|---|
| Series | B7228 | |
| Bore diameter | d | 140 mm |
| Outside diameter | D | 250 mm |
| Width | B | 42 mm |
| Basic dynamic load rating | C | 213 kN |
| Basic static load rating | C0 | 157 kN |
| Fatigue load limit | Pu | 11.9 kN |
| Mass | ≈m | 7.736 kg |
| Precision class | P4S — Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 | |
| Sealing | Without — Not sealed | |
| Cage | T — Laminated fabric cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 100 °C |
Product characteristics6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload class | L | Preload light |
| Contact angle | E | Contact angle 25° |
| Tolerance class | P4S | Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 |
| Type of Seal | Without | Not sealed |
| Cage | T | Laminated fabric cage |
| Arrangement bearing set | U | Single bearing |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 140 mm5.512 in |
| Outside diameter | D | 250 mm9.843 in |
| Width | B | 42 mm1.654 in |
| Basic dynamic load rating, radial | Cr | 213,000 N47,886.691 lbf |
| Basic static load rating, radial | C0r | 157,000 N35,296.763 lbf |
| Fatigue load limit, radial | Cur | 11,900 N2,675.36 lbf |
| Limiting speed for grease lubrication | nG Grease | 4,500 1/min |
| Limiting speed for oil lubrication | nG Oil | 6,700 1/min |
| Mass | ≈m | 7.736 kg17.055 lbs |
Mounting dimensions11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 163 mm6.417 in |
| Diameter shaft shoulder clearance | da | h12 |
| Shoulder diameter outer ring | Da | 226.5 mm8.917 in |
| Shoulder diameter outer ring clearance | Da | H12 |
| Maximum recess radius | ra max | 2.5 mm0.098 in |
| Maximum recess radius | ra1 max | 2.5 mm0.098 in |
| Minimum diameter injection pitch | Etk min | 175.9 mm6.925 in |
| Maximum diameter injection pitch | Etk max | 187 mm7.362 in |
| Minimum diameter injection pitch | Etk1 min | 175.9 mm6.925 in |
| Maximum diameter injection pitch | Etk1 max | 187 mm7.362 in |
| Distance between the apexes of the pressure cones | a | 66.5 mm2.618 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 3 mm0.118 in |
| Minimum chamfer dimension | r1 min | 3 mm0.118 in |
| Contact angle | α | 25 ° |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 100 °C212 °F |
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 Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 362221 | |
| Brand | FAG | |
| Base Type | B7228 | |
| Old Designation | ["B7228E.TPA.P4.UL","B7228E.T.P4S.UL"] | |
| X Life Marking | n.r. | |
| SAP material number | 0191574360000 | |
| Base product | 2305080311 | |
| Bearing X designation | B7228-E-T-P4S | |
| Mounting Manager ID | B7228-E-T-P4S |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spindle bearing B72..-E, adjusted, in pairs or sets, contact angle α = 25°, restricted tolerances | |
| Short Description | Spindle bearing |
Additional information9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force light | FV L | 2,141 N481.34 lbf |
| Preload force medium | FV M | 6,870 N1,544.514 lbf |
| Preload force heavy | FV H | 14,029 N3,154.002 lbf |
| Lift-off force light | KaE L | 6,233 N1,401.304 lbf |
| Lift-off force medium | KaE M | 20,615 N4,634.667 lbf |
| Lift-off force heavy | KaE H | 43,390 N9,754.946 lbf |
| Axial rigidity light | ca L | 373 N/µm |
| Axial rigidity medium | ca M | 579 N/µm |
| Axial rigidity heavy | ca H | 775 N/µm |
Technical Data31 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 140 mm | |
| Outside Diameter (D) | 250 mm | |
| Width (B) | 42 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 213,000 N | |
| Basic Static Load Rating, Radial (C0R) | 157,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 100 °C | |
| Axial Rigidity Heavy (Ca H) | 775 N/µm | |
| Axial Rigidity Light (Ca L) | 373 N/µm | |
| Axial Rigidity Medium (Ca M) | 579 N/µm | |
| Diameter Shaft Shoulder (Da) | 163 mm | |
| Lift Off Force Heavy (Kae H) | 43,390 N | |
| Lift Off Force Light (Kae L) | 6,233 N | |
| Lift Off Force Medium (Kae M) | 20,615 N | |
| Limiting Speed For Oil Lubrication (Ng Oil) | 6,700 1/min | |
| Maximum Diameter Injection Pitch (Etk1 Ma) | 187 mm | |
| Maximum Diameter Injection Pitch (Etk Max) | 187 mm | |
| Minimum Diameter Injection Pitch (Etk1 Mi) | 175.9 mm | |
| Preload Force Heavy (Fv H) | 14,029 N | |
| Preload Force Light (Fv L) | 2,141 N | |
| Preload Force Medium (Fv M) | 6,870 N | |
| Shoulder Diameter Outer Ring (Da) | 226.5 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 4,500 1/min | |
| Minimum Diameter Injection Pitch (Etk Min) | 175.9 mm | |
| Fatigue Load Limit, Radial (Cur) | 11,900 N | |
| Minimum Chamfer Dimension (Rmin) | 3 mm | |
| Maximum Fillet Radius (Ra Max) | 2.5 mm | |
| Maximum Recess Radius (Ra1 Max) | 2.5 mm | |
| Minimum Chamfer Dimension (R1 Min) | 3 mm | |
| Contact Angle (Α) | 25 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 66.5 mm |
