Deep groove ball bearings and double row deep groove ball bearings

Core Tip: Deep groove ball bearings are the most common type of rolling bearings. The basic deep groove ball bearing has an outer ring, an inner ring, a set of steel balls and a set of cages. Deep groove ball bearing
Deep groove ball bearings are the most common type of rolling bearings. The basic deep groove ball bearing has an outer ring, an inner ring, a set of steel balls and a set of cages. Deep groove ball bearing type code is 6. Deep groove ball bearings are mainly used to withstand pure radial loads and can also withstand radial and axial loads. When it is only subjected to a pure radial load, the contact angle is zero. When the deep groove ball bearing has a large radial clearance, it has the performance of an angular contact bearing and can withstand a large axial load. The deep groove ball bearing has a small friction coefficient and a high limit speed. Especially in high-speed running conditions with large axial loads, deep groove ball bearings are superior to thrust ball bearings. The deep groove ball bearing has a simple structure and is easy to achieve high manufacturing precision compared with other types, so it is easy to be mass-produced in series, and the manufacturing cost is also low, and the use is extremely common. In addition to the basic type, deep groove ball bearings also have various modified structures, such as: deep groove ball bearings with dust cover; deep groove ball bearings with rubber seals; deep groove ball bearings with snap grooves; Deep groove ball bearings with large load capacity of ball notches; double row deep groove ball bearings. 1. Deep groove ball bearing with dust cover Standard type Z-type and 2Z type with deep groove ball bearing with dust cover, Z type with dust cover on one side and 2Z type with dust cover on both sides. The bearing with dust cover is used in the condition that it is difficult to separate the lubrication, the lubricating oil road is installed and the inspection condition is inconvenient. The bearing has been filled with the quantitative and fixed grade of anti-rust and lubricating lithium-based grease in the manufacturer. The amount of grease injected into each bearing is usually 1/4~1/3 of the effective space in the bearing. It can also increase or decrease the amount of grease according to user requirements. The injected grease usually ensures that the bearing operates at -40 to +120 °C. If the user has higher requirements for the bearing, other properties and grades of grease can be filled according to the situation. Bearings with dust caps can be effectively worked for a long time after being greased, without the need to add grease during use. The bearing with dust cover is mostly used for small and medium-sized generators, both ends of the rotor of the motor, automobiles, tractors, air conditioners, fans, etc., as well as occasions where the noise vibration of the bearing is particularly required. 2. Deep groove ball bearing with sealing ring Standard type deep groove ball bearing with sealing ring has contact type sealed bearing RS type (one side seal), 2RS type (two side seal) and non-contact type sealed bearing RZ type (one side seal) 2RZ type (two-sided seal). The performance, grease and use of bearings with seals are essentially the same as for bearings with dust caps. The difference is that there is a large gap between the dust cover with the dust cover bearing and the inner ring, and the gap between the sealing lip and the inner ring of the non-contact seal bearing is small, and the sealing lip of the contact seal bearing is There is no gap between the inner rings, the sealing effect is good, but the friction is increased. In the case of low noise requirements, the smaller size deep groove ball bearings of the 60 and 62 series are used. Regardless of open bearings, bearings with dust caps or seals, low noise and low vibration requirements can be specified when ordering. In China's JB (Mechanical Industry Standard), the vibration allowable values ​​of the three frequency bands of V1, V2, and V3 are specified. Ultra-low noise bearings are also available from SKF, which are marked with the rear code QE5. 3. Deep groove ball bearing with snap groove and retaining ring. Standard type deep groove ball bearing with snap groove, rear coded N, bearing rear stop code with stop groove and stop ring It is NR, in addition to ZN, ZNR and other structural variants.

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