Sunspeed High Quality Deep groove ball bearings

Deep groove ball bearings (GB/T 276-2003), formerly known as single-row centripetal ball bearings, are the most widely used rolling bearings. It is characterized by small friction resistance, high speed, can be used to bear radial load or radial and axial combined load at the same time on the machinery, can also be used to bear axial load on the machinery, such as small power motors, automobile and tractor gearboxes, machine tool gearboxes, general machinery, tools and so on.

The basic type of deep groove ball bearing consists of an outer ring, an inner ring, a group of steel balls and a group of cages. There are two types of deep groove ball bearings: single row and double row. Deep groove ball structure is also divided into sealed and open structure. Open type means that the bearing does not have a sealed structure. The dustproof seal cover is made of steel sheet stamping, which only plays a simple role in preventing dust from entering the bearing raceway. Oil-proof type is contact oil seal, which can effectively prevent grease spillover in the bearing.

Single row deep groove ball bearing type code is 6, double row deep groove ball bearing code is 4. Its structure is simple, easy to use, is the production of the most common, the most widely used kind of bearings. 

Deep groove ball bearing mainly bears radial load, also can bear radial load and axial load at the same time. When it bears only radial load, the contact Angle is zero. When deep groove ball bearing has large radial clearance, it has the performance of angular contact bearing and can withstand large axial load. The friction coefficient of deep groove ball bearing is very small and the limit speed is also very high. 

Deep groove ball bearings are the most commonly used rolling bearings. Its structure is simple and easy to use. Mainly used to bear radial load, but when the radial clearance of the bearing is increased, it has the performance of a certain angular contact ball bearing, and can bear radial and axial combined load. When the speed is high and the thrust ball bearing is not suitable, it can also be used to bear pure axial load. Compared with other types of bearings with the same specification and size as deep groove ball bearings, this kind of bearings has small friction coefficient and high limit speed. But not impact resistance, not suitable for heavy load.

After the deep groove ball bearing is mounted on the shaft, the axial displacement in both directions of the shaft or the housing can be limited within the axial clearance range of the bearing, so it can be axially positioned in both directions. In addition, this kind of bearing also has a certain self-aligning ability. When the bearing is tilted 2 '~ 10' relative to the shell hole, it can still work normally, but it has a certain influence on the bearing life.

Deep groove ball bearing has simple structure and is easy to achieve higher manufacturing accuracy compared with other types, so it is convenient for mass production into series, and the manufacturing cost is lower, so it is very popular in use. In addition to the basic type, there are various variation structures, such as: deep groove ball bearing with dust cover, deep groove ball bearing with rubber sealing ring, deep groove ball bearing with stop groove, deep groove ball bearing with large load capacity with ball notch, double row deep groove ball bearing.

Deep groove ball bearings are mainly used to bear radial loads, but are also commonly used to bear radial and axial composite loads. Especially when the speed of mechanical equipment is very high and it is not suitable to use thrust bearing, the bearing can be used to bear two-way pure axial load, and there is no need for maintenance during the work. It is a kind of bearing with low price and wide use. Deep groove ball bearing models: deep groove ball bearing (60000 type); Deep groove ball bearings with stop grooves on the outer ring (Type 60000N); Deep groove ball bearings with dustproof cover on one side and stop groove on the other side (60000-Zn type); Deep groove ball bearings with dust cover on both sides and stop grooves on the outer ring (60000-2Zn type); Deep groove ball bearings with dustproof cover on one side (Model 60000Z); Deep groove ball bearings with dustproof cover on both sides (Type 60000-2Z); Deep groove ball bearings with sealing ring on one side (60000-LS, 60000-RZ); Deep groove ball bearings with sealing rings on both sides (60000-2LS, 60000-2RZ); Flanged outer ring deep groove ball bearing (F60000 model); Deep groove ball bearings with flanged outer ring with dustproof cover on one side (type F60000-Z); Deep groove ball bearings with flanged outer ring with dust cover on both sides (type F60000-2Z) are 11 kinds in total.

According to the size of deep groove ball bearings, they can be divided into:

(1) miniature bearings ---- nominal outside diameter size range of 26mm below the bearing; 

(2) small bearings ---- nominal outside diameter size range of 28-55mm bearings; 

(3) small and medium-sized bearings ---- nominal outside diameter size range of 60-115mm bearings; 

(4) medium and large bearings ---- bearing nominal outside diameter size range of 120-190mm 

(5) large bearings ---- nominal outside diameter size range of 200-430mm bearings

(6) extra-large bearings ---- bearing with nominal outside diameter size range of more than 440mm.

The processing forms of deep groove ball bearing parts are as follows:

1, multi-process processing: general bearing production needs 20 ~ 40 processes, as many as 70.

2, molding processing: the working surface of bearing parts are rotary forming surface, suitable for processing by forming method.

3, precision machining: most of the surface of the bearing parts should be ground, and the grinding size and geometric accuracy are in μm.

Deep groove ball bearings can be used in gearboxes, instruments and meters, motors, household appliances, internal combustion engines, traffic vehicles, agricultural machinery, construction machinery, engineering machinery, roller type roller skates, yo-yo, etc

Standard deep groove ball bearings have common grades, all in line with GB/T 307.3 -- 1996.

The radial clearance of bearings is divided into original clearance, installation clearance and working clearance. Usually, the original radial clearance of the bearing is greater than the clearance of the bearing when it is working. Clearance is an important technical parameter of bearings, which directly affects the performance of the bearing such as load distribution, vibration, noise, friction, service life and motion precision of machinery. Strictly speaking, the rated dynamic load of the bearing varies with the size of the clearance. The rated loads (C and C0) listed in the product sample are those at zero working clearance. If clearance is too large, it will cause the bearing internal bearing area to decrease, the rolling contact surface stress to increase, the motion accuracy of the bearing to decrease, the vibration and noise to increase, the service life of the bearing to shorten: if clearance is too small, it will cause heating and temperature rise, and even lead to the phenomenon of "bite dead" in the operation of the bearing. Therefore, it is very important to choose different grades of bearing clearance according to the type and working conditions of bearings.

 Standard deep groove ball bearings have internal clearances of grade C2, standard (CN), grade C3, grade C4 and grade C5, all in accordance with GB4604.

Deep groove ball bearings generally use steel plate stamping cages or brass solid cages. When the outside diameter is less than 400 mm, the steel plate stamping cage is used without the rear designation. When the outside diameter is greater than 400 mm, the brass solid cage is used without the rear designation.

Deep groove ball bearings, bearing load is too small in operation, will cause sliding between the ball and the raceway, become the cause of abrasion. In particular, large deep groove ball bearings with large ball and cage weight have this tendency. In many cases, bearing corrosion will occur, there are many reasons leading to bearing corrosion, the most common in our daily life are the following main factors:

1) Intruded by water and dirt due to poor sealing device;

2) The bearing has not been used for a long time, exceeds the rust prevention period, and lacks maintenance.

3) The roughness of metal surface is large;

4) Contact with corrosive chemical media, bearing cleaning is not clean, the surface is stained with dirt, or contact bearing with sweat hand, bearing cleaning, not timely packaging or installation, long-term exposure to the air, by air moisture invasion and contamination;

5) ambient temperature and humidity and contact with various environmental media; Failure of anti-rust agent or quality nonconformity.