Deep groove ball bearing type
There are many types of bearings, among which deep groove ball bearing belongs to one of centripetal ball bearings. In the process of use, deep groove ball bearing has three characteristics: high speed, high precision and low noise and vibration. It mainly bears radial load. According to the use of different deep groove ball bearings, it also has different types of deep groove ball bearings.
1. Deep groove ball bearing with dust cover
The standard deep groove ball bearing with dust cover has two types: Z type and 2Z type (NSK is called ZZ type). It is generally used under the conditions that it is difficult to lubricate alone and it is inconvenient to place the lubricating oil circuit and check the lubrication. The antirust and lubricating lithium grease injected into the bearing is usually 1 / 4 ~ 1 / 3 of the internal space of the bearing;
2. Deep groove ball bearing with sealing ring
Standard deep groove ball bearings with sealing rings include contact sealing ring bearings RS type (NSK called DDU type, one side sealing) and 2RS type (two sides sealing) and non-contact sealing bearings RZ type (NSK called VV type, one side sealing) and 2RZ type. Its performance, grease filling and purpose are basically the same as those of the bearing with dust cover, except that there is a large gap between the dust cover and the inner ring, while the gap between the sealing lip and the inner ring of the non-contact sealing ring is small, and there is no gap between the sealing lip and the inner ring of the contact sealing ring bearing. The sealing effect is good, but the friction coefficient increases.
3. Deep groove ball bearing with stop groove and stop ring
The rear code of standard deep groove ball bearing with stop groove is n, and the rear code of deep groove ball bearing with stop groove and stop ring is HR. In addition, there are structural variants such as Zn and ZNR. Deep groove ball bearing with stop ring can not only bear radial load, but also limit the axial displacement of the bearing, simplify the structure of the bearing seat and reduce the bearing size. It is generally used for working parts with small axial load such as automobiles and tractors.
4. Deep groove ball bearing with ball loading notch
The standard deep groove ball bearing with ball notch has two diameter series of 200 and 300. There are notches on the inner and outer rings on one side, so more balls can be loaded to increase its radial load capacity. However, due to the small axial load capacity, it can not run at high speed. If there is a large axial load, it needs to be used with general deep groove ball bearings.
5. Double row deep groove ball bearing
Standard double row deep groove ball bearings are 4200a and 4300a. There is no ball gap in type a bearing.
Deep groove ball bearing type 6. Single row deep groove ball bearing
Single row deep groove ball bearing with small friction torque is suitable for high-speed rotation, low noise and low vibration. In addition to the open type, there are bearings with steel plate dust cover, rubber seal ring bearings and steel plate stamping cages.
The above three characteristics and some types of deep groove ball bearings make us common types in the use of deep groove ball bearings.
You can check more details of ball bearings as follow,
