21311-E1-K30 Spherical Roller Bearings Higher Cost-effectiveness And Operational Security With X-life
The 21311-E1-K30 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 21311-E1-K30 bearing is a Spherical roller bearings Higher cost-effectiveness and operational security with X-life with an inner diameter of 55 mm , an outer diameter of 120 mm, a width of 29 mm. GCr15, GCr15SiMn, SUJ2 rings, GCr15, SUJ2 rolling mlement. Its dynamic radial rated load is approximately 159901 N, its static radial rated load is approximately 154927 N. It uses CN standard radial clearance, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
21311-E1-K30 bearings have the advantages of Self-aligning, high load-bearing capacity, impact resistant, and adaptable to heavy loads, and are therefore widely used in the Gearboxes, drive shafts, conveying equipment, general machinery.
| Part Number | 21311-E1-K30 |
| Design Type | E1 = without central rip |
| Bore Type | K30 = Tapered bore (K30 = taper 1:30) |
| RIC | CN |
| X-Life | XL long life design |
| Row | 2 |
| Bearing Type | Spherical roller bearings Higher cost-effectiveness and operational security with X-life |
| Manufacturer Part Code | 21311-E1-K30 |
| Original Code | 21311-E1-K30 |
| Cage | JPA = Stamping steel cage |
| Measurement | Metric |
| d φ Inside [inch] | 2.165 |
| D Φ Outside [inch] | 4.724 |
| B Width [inch] | 1.142 |
| nB Reference speed (grease) [min–1] | 5092 |
| nG Limiting speed (oil) [min–1] | 6293 |
| Weight [kg] | 1.19 |
| r(min.) Chamfer [inch] | 0.079 |
| D1 [inch] | 3.870 |
| d2 [inch] | 2.811 |
| ds [inch] | 0.126 |
| ns [inch] | 0.256 |
| Cr Radial Dynamic [lbf] | 35945 |
| C0r Radial static [lbf] | 34827 |
| Cur Radial Fatigue [lbf] | 4528 |
| Temperature - T(min)[°C] | -30 |
| Temperature - T(max)[°C] | up +200 |
| Mounting dimensions | |
| da(min.) [inch] | 2.598 |
| Da(max.) [inch] | 4.291 |
| ra(max.) [mm] | 1.19 |
| Calculation coefficient | |
| e | 0.24 |
| Y0 | 2.78 |
| Y1 | 2.84 |
| Y2 | 4.23 |
The 21311-E1-K30 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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