3311-BD-2HRS Angular Contact Ball Bearings Double Row, Sealed, Stamping Steel Cage
The 3311-BD-2HRS They are widely used in equipment with high requirements for axial rigidity and space efficiency, including: automotive wheel hubs, industrial robots (wrist), machine tool spindles (lathes), electric fans (spindle supports), turbochargers, and medical devices (high-speed centrifuges).
The 3311-BD-2HRS bearing is a Angular contact ball bearings Double row sealed with an inner diameter of 55 mm , an outer diameter of 120 mm, a width of 49.2 mm. It typically uses P6 grade precision tolerances and bearing steel rings, bearing steel rolling mlement. Its dynamic radial rated load is approximately 115989 N, its static radial rated load is approximately 87956 N. It uses CN standard radial clearance, 2HRS = Contact seal on both sides type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
3311-BD-2HRS bearings ( 55 mm x 120 mm x 49.2 mm) have the advantages of It can withstand radial and bidirectional axial loads simultaneously, has a compact structure, good rigidity, and is easy to install, and are therefore widely used in the Automotive wheel hub units, pumps, compressors, industrial gearboxes, and machine tool spindles.
| Part Number | 3311-BD-2HRS |
| Design Type | B = Bearing without filling slot |
| Bearing Type | Angular contact ball bearings Double row sealed |
| Series | 33..-BD-XL-2HRS |
| X-Life | XL long life design |
| Contact angle - α [°] | 30 |
| Rows NO. | double |
| Manufacturer Part Code | 3311-BD-2HRS |
| Radial internal clearances | CN |
| Cage | JH = Stamping steel cage |
| Equivalent | 3311-BD-2HRS |
| Lubricant | GA13 = Ball bearing and insert bearing grease |
| Seal type | 2HRS = Contact seal on both sides |
| Heat stabilization | S0 = up to 150° |
| m Weight [kg] | 2.35 |
| Reference From | FAG 3311-BD-2HRS |
| Dimensions | |
| d φ Inside [inch] | 2.165 |
| D Φ Outside [inch] | 4.724 |
| B Width [inch] | 1.937 |
| r(min.) [inch] | 0.079 |
| D1 [inch] | 4.067 |
| D2 [inch] | 4.204 |
| d1 [inch] | 3.101 |
| d2 [inch] | 3.006 |
| a [inch] | 2.811 |
| Performance | |
| Cr Radial Dynamic [N] | 115989 |
| C0r Radial static [N] | 87956 |
| Cur Radial Fatigue [N] | 6081 |
| nG Limiting speed (oil) [r/min] | 4340 |
| Mounting dimensions | |
| da(min.) [inch] | 2.598 |
| Da(max.) [inch] | 4.291 |
| ra(max.) [inch] | 0.079 |
The 3311-BD-2HRS Double-row angular contact ball bearings primarily consist of an integral inner ring (or double-half inner ring), an integral outer ring, two rows of balls, and a cage. The contact angle is typically 25°, 30°, or 35°, with the two rows of balls arranged back-to-back, providing bidirectional axial load capacity.
A single bearing can withstand both radial and bidirectional axial loads, eliminating the need for paired installation. They offer high axial rigidity and excellent resistance to overturning moments, making them suitable for handling instantaneous overloads. The integral design simplifies installation, saves space, and is widely used in applications requiring compact designs.
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