1228-M
Self-aligning ball bearing
Self-aligning ball bearing 12..-M, solid brass cage
Replaces
1228M
Description
Metric
Imperial
Main Dimensions & Performance Data
| d | 140 mm | Bore diameter |
| D | 250 mm | Outside diameter |
| B | 50 mm | Width |
| Cr | 163,000 N | Basic dynamic load rating, radial |
| C0r | 74,000 N | Basic static load rating, radial |
| Cur | 3,350 N | Fatigue load limit, radial |
| nG | 3,900 1/min | Limiting speed |
| nϑr | 3,650 1/min | Reference speed |
| ≈m | 11.3 kg | Weight |
Mounting dimensions
| da min | 154 mm | Minimum diameter shaft shoulder |
| Da max | 236 mm | Maximum diameter of housing shoulder |
| ra max | 2.5 mm | Maximum fillet radius |
Dimensions
| rmin | 3 mm | Minimum chamfer dimension |
| D1 | 220.5 mm | Shoulder diameter outer ring |
| d1 | 175 mm | Shoulder diameter inner ring |
| C1 | 2.7 mm | Overhang rolling element |
Temperature range
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 200 °C | Operating temperature max. |
Calculation factors
| e | 0.21 | Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y |
| Y1 | 3.03 | Dynamic axial load factor |
| Y2 | 4.68 | Dynamic axial load factor |
| Y0 | 3.17 | Static axial load factor |
Your current product variant
| Lubricant | without | Bearing not greased |
| Sealing | without | not sealed |
| Cage | M | solid brass cage, ball guided |
| Tolerance class | PN | Normal (PN) |
| Radial internal clearance | CN | Group N (CN) |
| Bore type | Z | Cylindrical |
Characteristics
