The use of NSK deep groove ball bearings

NSK deep groove ball bearings are mainly used to bear pure radial load, but also can bear radial load and axial load at the same time. When it is only subjected to pure radial load, the contact angle is zero. When deep groove ball bearings have a large radial clearance, they have the performance of angular contact bearings and can withstand large axial loads. Deep groove ball bearing friction coefficient is very small, limit speed is also very high, especially in high axial load conditions of high-speed operation, deep groove ball bearings are more superior than thrust ball bearings. Deep groove ball bearings have a simple structure and are easy to achieve high manufacturing accuracy compared to other types. Deep groove ball bearings in addition to the basic types, there are various variant structures, such as: deep groove ball bearings with dust caps; deep groove ball bearings with rubber seals; deep groove ball bearings with stop grooves; Ball bearing notched deep load ball bearings; double row deep groove ball bearings.

1) Deep groove ball bearings with dust cover, standard deep groove ball bearings with dust cover are available in Z type and 2Z type. Z type is provided on one side with dust cover, and 2Z is ​​provided with dust cover on both sides. type. Bearings with a dust cover are used in the conditions where it is difficult to separately lubricate, place lubricants, and check lubrication conditions. Bearings have been filled with rust-proof and lubricated dual-purpose lithium greases at the manufacturer's factory. Bearings with a dust cover can be greased for long periods of time without the need to add grease during use. The bearings with dust cover are mostly used for the ends of rotors of small and medium-sized generators and motors, automobiles, tractors, air conditioners, fans, etc. (Bearings with dust caps are mainly used in the inner ring rotating conditions. If it is the outer ring rotation , Bearings leak at high speeds, which can cause leakage of grease), and places where there is a special requirement for the noise and vibration of bearings.

2) deep groove ball bearings with seal ring, standard deep groove ball bearings with seal ring are contact seal bearings RS type (one side seal), 2RS type (both sides seal) and non-contact seal bearing type RZ (one side seal ), 2RZ type (both sides sealed). Bearings with sealing rings are basically the same in performance, grease filling and use as bearings with dust caps. The difference is that there is a large gap between the dust cover of the bearing with the dust cover and the inner ring, and the gap between the sealing lip of the non-contact seal bearing and the inner ring is small, and the sealing lip of the contact sealing ring bearing There is no gap between the inner ring and the sealing effect is good, but the friction increases. In general, there are occasions where low noise is required. The smaller size deep groove ball bearings of series 60 and 62 are used. Regardless of open bearings, bearings with a dust cover or bearings with a ring seal, low noise and low vibration requirements can be requested at the time of order.

3) Deep groove ball bearings with stop grooves and snap ring, standard type deep groove ball bearings with stop grooves, rear code name N, bearing with stop groove and snap ring Code name NR, in addition to ZN, ZNR and other structural variants. In addition to the function of deep groove ball bearings that can withstand radial loads, a stop groove and a bearing with a snap ring can limit the axial displacement of the bearing, simplify the axial structure of the bearing housing and reduce the axial dimension. Generally, this type is mostly used in working parts such as automobiles and tractors where the axial load is not large.

4) Deep groove ball bearings with ball gaps. These bearings have notches on the inner and outer rings on one side of the bearing. More balls can be loaded through this port, so that the radial bearing capacity of the bearing is better than that of the standard type. Deep groove ball bearings are large. However, the axial load carrying capacity is small and it cannot operate at high speed. If there is a large axial load, it usually needs to be used with a set of ordinary deep groove ball bearings. Deep groove ball bearings with ball holes have a variety of structural variants. The structural variant with a dust cover has the same advantages as a basic type of dust cover bearing, and the bearing can be used for a long time after a single injection of lithium grease. Structural variants with stop grooves and stop rings, often used in automotive gearboxes, can limit the axial displacement of the bearings within a limited bore, and can also be used with smaller bearings under conditions of low axial loads. Subject to greater radial loads. (Article from http://)