240/1000-B-MB bearings ( 1000 mm x 1420 mm x 412 mm) have the advantages of High load-bearing capacity, impact resistant, self-aligning, and easy to install, and are therefore widely used in the Wind turbine main shaft, large ship main shaft, giant construction machinery.

| Part Number | 240/1000-B-MB |
| Design Type | B = with fixed central rib |
| Bore Type | Z = Cylindrical bore |
| RIC | CN |
| Row | 2 |
| Bearing Type | Double row spherical roller bearings, symmetric 3 ribs |
| Manufacturer Part Code | 240/1000B.MB |
| Equivalent | 240/1000B.MB |
| Cage | MB = Solid brass cage, guided on inner ring |
| Measurement | Metric |
| Seal type | OPEN |
| Relubrication | Standard |
| d φ Inside [inch] | 39.370 |
| D Φ Outside [inch] | 55.905 |
| B Width [inch] | 16.220 |
| nB Reference speed (grease) [min–1] | 141 |
| nG Limiting speed (oil) [min–1] | 305 |
| Weight [kg] | 2133.8 |
| r(min.) Chamfer [inch] | 0.295 |
| D1 [inch] | 50.327 |
| ds [inch] | 0.492 |
| ns [inch] | 0.925 |
| Cr Radial Dynamic [lbf] | 3686683 |
| C0r Radial static [lbf] | 9441555 |
| Cur Radial Fatigue [lbf] | 595700 |
| Temperature - T(min)[°C] | -30 |
| Temperature - T(max)[°C] | +200 |
| Mounting dimensions | |
| da(min.) [inch] | 40.472 |
| Da(max.) [inch] | 54.803 |
| ra(max.) [mm] | 2133.8 |
| Calculation coefficient | |
| e | 0.27 |
| Y0 | 2.43 |
| Y1 | 2.49 |
| Y2 | 3.71 |
The 240/1000-B-MB Double-row spherical roller bearings mainly consist of an inner ring, an outer ring, two rows of spherical rollers, a cage, and seals. The outer ring raceway has a spherical structure, while the inner ring has a double-row raceway. The rollers and raceways are logarithmically curved. The cage is typically made of stamped steel or machined brass.
Double-row spherical roller bearings possess excellent self-aligning properties, compensating for shaft deflection, installation errors, and misalignment. They can simultaneously withstand radial loads and bidirectional axial loads, exhibiting extremely high load-bearing capacity and strong impact resistance. Furthermore, the internal clearance can be optimized for vibration conditions, effectively reducing frictional temperature rise.















