Sulli Xiaosu: The following is a big secret to you about the characteristics of double row angular contact ball bearings.
NTN bearings
"Double row angular contact ball bearings are characterized by the ability to accommodate a combined load of both radial and axial loads, limiting the axial displacement of both sides of the shaft."
Compared with the bi-directional thrust ball bearing, this bearing has a higher limit speed, a contact angle of 32 °, good rigidity, and can withstand a large overturning torque, and is widely used in the front wheel hub of small cars (some models also use double row tapered roller bearings of the same size).
There are four structural variants of double row angular contact ball bearings
1. Standard design of A-type outer diameter less than or equal to 90mm bearing. There is no ball notch, so it can withstand equal two-way axial loads. Lightweight glass fiber reinforced nylon 66 cage with small bearing temperature rise.
2. Standard design of A-type bearings with an outer diameter greater than 90mm. There is a ball notch on one side and it is equipped with a steel plate stamped cage or a brass solid cage.
3, E type is a reinforced structure, with a ball notch on one side, can be loaded with more steel balls, so the bearing capacity is higher.
4. Double row angular contact ball bearing with shield type on both sides and A type with sealing ring on both sides and E type design can be equipped with dust cover (non-contact type) or sealing ring (contact type) on both sides.
The interior of the sealed bearing is filled with anti-rust lithium-based grease, and the operating temperature is generally -30 ~ +110 °C. No relubrication is required during use, and should not be heated or cleaned before installation.
Care should be taken when mounting double row angular contact ball bearings, although bearings can accommodate two-way axial loads, but if there is a ball notch on one side, care should be taken not to let the main axial load pass through the grooved side with the gap.
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