Views: 4 Author: Site Editor Publish Time: 2022-09-28 Origin: Site
The design of double row angular contact ball bearings is basically the same as that of single row angular contact ball bearings, but it takes up less axial space.
The characteristic of double row angular contact ball bearings is that they can bear the combined load of radial and axial loads at the same time, limiting the axial displacement on both sides of the shaft.
Compared with the two-way thrust ball bearing, this bearing has a higher limit speed, a contact angle of 30 degrees, good rigidity, and can withstand a large overturning moment. Widely used in front wheel hubs of automobiles (some models also use double row tapered roller bearings of the same size)
Type A: Standard design for bearings with an outer diameter less than or equal to 90 mm.
There is no ball clearance, so it can withstand equal axial loads in both directions. Features a lightweight fiberglass reinforced nylon 66 cage. The bearing temperature rise is small.
Type B: Standard design for bearings with an outer diameter greater than 90 mm. Ball notches on one side, equipped with Z-shaped steel stamped cages or solid brass cages.
Type C: It is a reinforced structure with a ball gap on one side, which can accommodate more steel balls, so the bearing capacity is higher.
Double row angular contact ball bearings have guards and seals on both sides,
A and C designs can have guards (non-contact) or seals (contact) on both sides.
The inside of the sealed bearing is filled with anti-rust lithium-based grease, and the working temperature is generally between -30 degrees and 110 degrees.
No relubrication is required during use, and no heating is required before installation.
When installing double row angular contact ball bearings, it should be noted that although the bearing can withstand axial loads in both directions, if there is a gap between the balls on one side, care should be taken not to let the main axial load pass through the bearing seat. The side with the gap has grooves.
The tiltability between the inner and outer rings of a double row angular contact ball bearing is limited.
The allowable inclination angle depends on the bearing's internal clearance, bearing size, internal design and the forces and moments acting on the bearing.
It should be ensured that the maximum allowable inclination angle does not cause excessive additional stress in the bearing.
If there is an inclination angle between the inner and outer rings of the bearing, it will affect the service life of the bearing, reduce the running accuracy of the bearing, and make the running noise larger. Double row angular contact ball bearings generally use nylon or brass solid cages.
When installing a double row angular contact ball bearing, it should be noted that although the bearing can withstand bidirectional axial loads, if there is a gap between the balls on one side of the bearing, be careful not to allow the main axial load to pass through the side of the bearing seat with a gap. Groove.
When using bearings, care should be taken that the side raceways without the ball notches bear the main load.
Compared with single row angular contact ball bearings, double row angular contact ball bearings have better rigidity and can withstand overturning moments.
Bearings are inseparable. Especially suitable for applications with high rigidity requirements.
Widely used in front wheel hubs of automobiles (some models also use double row tapered roller bearings of the same size).
Single row angular contact ball bearings:
Machine tool spindle, high frequency motor, centrifugal separator, small car front wheel, differential pinion shaft, food machinery, indexing head, repair welding machine, electromechanical equipment, painting equipment, machine tool slot plate, arc welding machine, fuel Steam Turbine, Booster Pump, Low Noise Cooling Tower
Double row angular contact ball bearings:
Oil pump, Rosa drum machine, air compressor, Rosa drum machine, various transmissions, fuel pump, printing machinery, planetary reducer, extraction equipment, cycloidal pinwheel reducer, electric welding machine, electric soldering iron, gravity spray gun,
Stripping machines, half shafts, inspection and analysis equipment, fine chemical machinery, square boxes, food packaging machinery
