23976MB.C4 Spherical Roller Bearings With Central Rib Cylindrical Bore
The 23976MB.C4 Double-row spherical roller bearings are suitable for heavy-load, impact, and eccentric conditions. Classic applications include vibrating screen exciters, crushers, fans, paper machine press rolls, mining conveyor equipment, and marine propulsion shafts.
The 23976MB.C4 bearing is a Spherical roller bearings With central rib Cylindrical bore with an inner diameter of 380 mm , an outer diameter of 520 mm, a width of 106 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 1759916 N, its static radial rated load is approximately 3999912 N. It uses C4 standard radial clearance, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
23976MB.C4 bearings have the advantages of Self-aligning, extremely high load-bearing capacity, thinnest cross-section, low friction, suitable for confined spaces, and are therefore widely used in the Large crushers, mills, and rotary kilns.
| Part Number | 23976MB.C4 |
| Design drawing | 2 |
| Bore Type | Z = Cylindrical bore |
| RIC | C4 |
| Row | 2 |
| Bearing Type | Spherical roller bearings With central rib Cylindrical bore |
| Manufacturer Part Code | 23976MBC4 |
| Cage | MB = Solid brass cage, guided on inner ring |
| Measurement | Metric |
| d φ Inside [inch] | 14.961 |
| D Φ Outside [inch] | 20.472 |
| B Width [inch] | 4.173 |
| nB Reference speed (grease) [min–1] | 743 |
| nG Limiting speed (oil) [min–1] | 945 |
| Weight [kg] | 69.1 |
| r(min.) Chamfer [inch] | 0.157 |
| D1 [inch] | 18.803 |
| ds [inch] | 0.374 |
| ns [inch] | 0.697 |
| Cr Radial Dynamic [lbf] | 395629 |
| C0r Radial static [lbf] | 899180 |
| Cur Radial Fatigue [lbf] | 59557 |
| Temperature - T(min)[°C] | -30 |
| Temperature - T(max)[°C] | +200 |
| Mounting dimensions | |
| da(min.) [inch] | 15.535 |
| Da(max.) [inch] | 19.898 |
| ra(max.) [mm] | 69.1 |
| Calculation coefficient | |
| e | 0.19 |
| Y0 | 3.5 |
| Y1 | 3.58 |
| Y2 | 5.33 |
The 23976MB.C4 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.
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