The characteristics, differences and corresponding uses of a variety of common bearings(2)


6. Deep groove ball bearings Structurally, each ring of […]

6. Deep groove ball bearings
Structurally, each ring of a deep groove ball bearing has a continuous groove raceway with a cross-section of about one-third of the circumference of the ball's equatorial circumference. Deep groove ball bearings are mainly used to bear radial load, but also can bear certain axial load.
When the radial clearance of the bearing increases, it has the properties of an angular contact ball bearing and can withstand alternating axial loads in two directions. Compared with other types of bearings of the same size, this type of bearing has a small friction coefficient, high limit speed, and high precision. It is the preferred bearing type for users when selecting models.
Main uses: automobiles, tractors, machine tools, motors, water pumps, agricultural machinery, textile machinery, etc.
7. Thrust ball bearings
It consists of a washer-shaped raceway ring with a raceway and a ball and cage assembly. The raceway ring that matches the shaft is called the shaft ring, and the raceway ring that matches the housing is called the seat ring. The two-way bearing is matched with the secret shaft of the middle ring. The one-way bearing can bear one-way axial load, and the two-way bearing can bear the two-way axial load (both can not bear radial load).
Main uses: automobile steering pins, machine tool spindles.
8. Thrust roller bearing
Thrust roller bearings are used to bear the main axial load of the shaft, combined longitudinal load, but the longitudinal load shall not exceed 55% of the axial load. Compared with other thrust roller bearings, this type of bearing has a lower friction factor, higher speed, and has the ability to adjust the center. The rollers of type 29000 bearings are asymmetric spherical rollers, which can reduce the relative sliding of the stick and the raceway in the work, and the rollers are long and large in diameter, the number of rollers is large, and the load capacity is large. They are usually lubricated by oil. Grease lubrication can be used at low speeds.
Main uses: hydroelectric generators, crane hooks.
9. Cylindrical roller bearings
The rollers of cylindrical roller bearings are usually guided by the two ribs of a bearing ring. The cage roller and the guide ring form an assembly, which can be separated from the other bearing ring and is a separable bearing.
This kind of bearing is more convenient to install and disassemble, especially when the inner and outer rings, the shaft, and the shell are required to be interference fit. This type of bearing is generally only used to bear radial load. Only single row bearings with ribs on the inner and outer rings can bear small steady axial loads or large intermittent axial loads.
Main applications: large motors, machine tool spindles, axle boxes, diesel engine crankshafts, automobiles, gearboxes to keep in mind, etc.
10. Four-point contact ball bearing
It can bear radial load and two-way axial load. A single bearing can replace the angular contact ball bearing with front combination or back combination. It is suitable for bearing pure axial load or synthetic load with large axial load component. This type of bearing can bear any direction One of the contact angles can be formed under the axial load, so the ferrule and the ball are always in contact with three points on both sides of any contact line.
Main uses: aircraft jet engines, gas turbines.

Views: 71