| Bearing number | 661/653 |
| Size (mm) | 79.375x146.05x41.275 |
| Bore Diameter (mm) | 79,375 |
| Outer Diameter (mm) | 146,05 |
| Width (mm) | 41,275 |
| d | 79,375 mm |
| D | 146,05 mm |
| T | 41,275 mm |
| B | 41,275 mm |
| C | 31,75 mm |
| a | 33,4 mm |
| r min. | 3,6 mm |
| r2 min. | 3,2 mm |
| da min. | 96 mm |
| Da | 131 mm |
| db min | 90 mm |
| ra max. | 3,6 mm |
| rb max. | 3,2 mm |
| Db | 139 mm |
| Weight | 2,92 Kg |
| Basic dynamic load rating (C) | 208 kN |
| Basic static load rating (C0) | 301 kN |
| (Grease) Lubrication Speed | 2600 r/min |
| (Oil) Lubrication Speed | 3400 r/min |
| Calculation factor (e) | 0,41 |
| Calculation factor (Y0) | 0,81 |
| Bearing No. | 661/653 |
| r(min) | 3.6 |
| r1(min) | 3.2 |
| Cr | 261 |
| C0r | 301 |
| Cu | 45.3 |
| Grease lub. | 2600 |
| Oil lub. | 3400 |
| a(mm) | 33.4 |
| da | 96.0 |
| db | 90.0 |
| ra(max) | 3.6 |
| rb(max) | 3.2 |
| e | 0.41 |
| Y1 | 1.47 |
| Y0 | 0.81 |
| (Refer.)Mass(kg) | 2.91 |
