Deep groove ball bearings are the most common type of rolling bearings. The basic deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls and a set of cages. The deep groove ball bearing types are single row and double row. The deep groove ball structure is also divided into two types: sealed and open. The open type refers to the bearing without sealing structure. The sealed deep groove ball is divided into dustproof seal and oil proof. seal. The dust seal cover material is stamped from steel plate, which is simple to prevent dust from entering the bearing raceway. The oil-proof type is a contact type oil seal, which can effectively prevent the grease inside the bearing from overflowing.
The single row deep groove ball bearing type code is 6, and the double row deep groove ball bearing code is 4. The utility model has the advantages of simple structure and convenient use, and is the most common and widely used type of bearing.
working principle
Deep groove ball bearings are mainly subjected to radial loads and can also withstand radial loads and axial loads. When it is only subjected to radial loads, the contact angle is zero. When the deep groove ball bearing has a large radial clearance, it has the performance of angular contact ball and can withstand large axial load. The deep groove ball bearing has a small friction coefficient and a high limit speed.
Bearing characteristics
Deep groove ball bearings are the most commonly used rolling bearings. Its structure is simple and easy to use. It is mainly used to bear radial load, but when it increases the radial clearance of the bearing, it has certain angular contact ball bearing performance and can withstand combined radial and axial loads. It can also be used to withstand pure axial loads when the rotational speed is high and thrust ball bearings are not suitable. Compared with other types of bearings of the same size as deep groove ball bearings, these bearings have a small coefficient of friction and a high limit speed. However, it is not resistant to impact and is not suitable for heavy loads.
Structure and classification
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, and Deep groove ball bearings with large load capacity of ball notches, double row deep groove ball bearings.
Bearing type
Deep groove ball bearings are primarily used to withstand radial loads, but are also commonly used to withstand combined radial and axial loads. In particular, the mechanical equipment has a high rotational speed. When a thrust bearing is not suitable, the bearing can be used to withstand two-way pure axial load and requires no maintenance during operation. It is a kind of bearing with low price and wide application. Deep groove ball bearing models include: deep groove ball bearings (60000 type); deep groove ball bearings with outer groove on the outer ring (60000N type); deep groove ball with dust cover on one side and stop groove on the other side Bearing (60000-ZN type); deep groove ball bearing (60000-2ZN type) with dust cover on both sides, retaining groove on outer ring; deep groove ball bearing (60000Z type) with dust cover on one side; two sides Deep groove ball bearings with dust cover (60000-2Z type); deep groove ball bearings with sealing ring on one side (60000-LS type, 60000-RZ type); deep groove ball bearings with sealing ring on both sides (60000- 2LS type, 60000-2RZ type); deep groove ball bearing (F60000 type) with flange outer ring; deep groove ball bearing (F60000-Z type) with flange outer ring with dust cover; dust cover on both sides There are 11 kinds of deep groove ball bearings (F60000-2Z type) with flange outer ring
According to the size and size of deep groove ball bearings can be divided into:
(1) Miniature bearings----bearings with a nominal outside diameter range of 26mm or less;
(2) Small bearings----bearings with a nominal outer diameter range of 28-55mm;
(3) Small and medium-sized bearings----bearings with a nominal outer diameter range of 60-115mm;
(4) Medium and large bearings----bearings with a nominal outer diameter range of 120-190mm
(5) Large bearings----bearings with a nominal outer diameter range of 200-430mm;
(6) Extra large bearings----bearings with a nominal outer diameter range of 440mm or more.
Use application
Deep groove ball bearings can be used in gearboxes, instrumentation, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yo-yo, etc.
Precautions
Deep groove ball bearings, the bearing load is too small during operation, which will cause sliding between the ball and the raceway, which is the cause of the scratch. In particular, large deep groove ball bearings with large ball and cage weights have this tendency. In many cases, the bearing will rust, resulting in many reasons for bearing corrosion. The most common factors in our daily life are the following:
1) Intrusion by moisture, dirt, etc. due to poor sealing device;
2) The bearing is not used for a long time, exceeds the anti-rust period, and lacks maintenance.
3) The surface roughness of the metal is large;
4) Contact with corrosive chemical medium, the bearing is not cleaned, the surface is stained with dirt, or the bearing is contacted with sweat. After the bearing is cleaned, it is not packed or installed in time. The long-term exposure and air are affected by air moisture. Contaminated
5) Ambient temperature and humidity and contact with various environmental media; rust inhibitor failure or quality inconsistent requirements
Deep groove ball suffix meaning
C2: radial clearance is smaller than normal group
C3: Radial clearance is larger than normal group
C4: Radial clearance is greater than C3
C5: radial clearance is greater than C4
E: Strengthen the design
M: Machined brass cage, steel ball guide. Different designs and materials are followed by a digital identifier such as M2
MA: machined brass cage, outer ring guide
MB: machined brass cage, inner ring guide
MT33: Lithium grease, NLGI consistency 3, temperature range -30 to +120 degrees (standard fill)
MT47: Lithium grease, NLGI consistency 2, temperature range -30 to +110 degrees (standard fill)
N: outer ring with snap groove
NR: outer ring with snap groove and snap ring
N1: There is a groove on the side of the outer ring (used to match the stopper to prevent the outer ring from rotating)
P5: dimensional accuracy and rotation accuracy in accordance with ISO tolerance class 5
P6: dimensional accuracy and rotational accuracy in accordance with ISO tolerance class 6
P52: P5+C2
P62: P6+C2
P63: P6+C3
RS1: Nitrile diene rubber (NBR) contact seal with steel frame on one side
RSH: Nitrile diene rubber (NBR) contact seal with steel frame on one side
RSL: Nitrile diene rubber (NBR) low friction seal with steel frame on one side
RZ: Nitrile diene rubber (NBR) low friction seal with steel frame on one side
TH: Fiber reinforced phenolic resin cage (card type)
TN: injection molded nylon cage
TN9: Injection molded glass fiber reinforced nylon 6,6 cage
VL0241: The outer surface of the outer ring is coated with alumina, and the insulation capacity is up to 1000VDC.
VL2071: The outer surface of the inner ring is coated with alumina, and the insulation capacity is up to 1000VDC.
WT: Polyurea based grease, NLGI consistency 2, temperature range -40 to +160 degrees (standard fill)
Y: stamped copper cage
Z: Stamped steel dust cover on one side
ZNR: outer ring with stop groove and snap ring, the other side of the stop groove with stamped steel dust cover
2RS1: Nitrile rubber (NBR) contact seal ring with steel frame on both sides
2RSH: Nitrile rubber (NBR) contact seal ring with steel frame on both sides
2RSL: Nitrile rubber (NBR) low friction seal ring with steel frame on both sides
2RZ: Nitrile rubber (NBR) low friction seal ring with steel frame on both sides
2Z: stamped steel dust cover on both sides
2ZNR: outer ring with snap groove and snap ring, stamped steel dust cover on both sides