B7228-E-T-P4S-UL
Spindle bearing
Spindle bearings B72..-E, adjusted, in pairs or sets, contact angle α = 25°, restricted tolerances
Replaces
B7228E.T.P4S.UL, B7228E.TPA.P4.UL
Description
Metric
Imperial
Main Dimensions & Performance Data
| d | 140 mm | Bore diameter |
| D | 250 mm | Outside diameter |
| B | 42 mm | Width |
| Cr | 213,000 N | Basic dynamic load rating, radial |
| C0r | 157,000 N | Basic static load rating, radial |
| Cur | 11,900 N | Fatigue load limit, radial |
| nG Grease | 4,500 1/min | Limiting speed for grease lubrication |
| nG Oil | 6,700 1/min | Limiting speed for oil lubrication |
| ≈m | 7.736 kg | Weight |
Mounting dimensions
| da | 163 mm | Diameter shaft shoulder |
| da | h12 | Diameter shaft shoulder clearance |
| Da | 226.5 mm | Shoulder diameter outer ring |
| Da | H12 | Shoulder diameter outer ring clearance |
| ra max | 2.5 mm | Maximum recess radius |
| ra1 max | 2.5 mm | Maximum recess radius |
| Etk min | 175.9 mm | Minimum diameter injection pitch |
| Etk max | 187 mm | Maximum diameter injection pitch |
| Etk1 min | 175.9 mm | Minimum diameter injection pitch |
| Etk1 max | 187 mm | Maximum diameter injection pitch |
| a | 66.5 mm | Distance between the apexes of the pressure cones |
Dimensions
| rmin | 3 mm | Minimum chamfer dimension |
| r1 min | 3 mm | Minimum chamfer dimension |
| α | 25 ° | Contact angle |
Temperature range
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 100 °C | Operating temperature max. |
Additional information
| FV L | 2,141 N | Preload force light |
| FV M | 6,870 N | Preload force medium |
| FV H | 14,029 N | Preload force heavy |
| KaE L | 6,233 N | Lift-off force light |
| KaE M | 20,615 N | Lift-off force medium |
| KaE H | 43,390 N | Lift-off force heavy |
| ca L | 373 N/µm | Axial rigidity light |
| ca M | 579 N/µm | Axial rigidity medium |
| ca H | 775 N/µm | Axial rigidity heavy |
Your current product variant
| Contact angle | E | Contact angle 25° |
| Lubricant | Without | |
| Sealing | Without | |
| Outer shape | Standard | |
| Cage | T | Laminated fabric cage |
| Tolerance class | P4S | tolerance class P4S, FAG standard better than P4 to DIN 620 |
| Arrangement bearing set | U | Single bearing |
| Preload | L | preload light |
Characteristics
