RAH Deep Groove Ball Bearings Directly Factory Offer

How many information do you learn of the deep groove ball bearings? This artical will make you very clear to know this ball bearing with deep groove?

Deep groove ball bearings are suitable for high speed or even very high speed operation, and they are very durable and do not require frequent maintenance. This kind of bearing has small friction coefficient, high limiting speed, various size range and form, applied in precision instrucment, low noise motor, automobile, motorbike and generatal machinery industry, is the most widely used class of bearings in mechanical industry, Mainly bear radial load, can also bear a certain amount of axial load.

Baisc information:

Deep groove ball bearings are one of the most common types of rolling bearings, Basic deep groove ball bearing, this type of deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls and a set of cage. Deep groove ball bearing type has single row and double row two kinds. Deep groove ball structure is also divided into seal and open two kinds of structure, open type is the bearing without seal structure, seal type deep groove ball is divided into dust seal and oil seal, Dust seal cover material for the steel palte stamping, only play a simple to prevent dust into the bearing raceway. The oil-proof type is a contact oil sea, which can effectively prevent the grease in the bearing from overflowing.

Signle rowl deep groove ball bearing type codes for 6, double row deep groove ball bearing code for 4. Its sturcture is simple, easy to use, is the production of the most common, the most widely used class of bearings.

Working Principle

Deep groove ball bearings are mainly subject to radial loads, and can also be subject to radial loads and axial loads at the same time. When it only bear radial load, the contact angle is zero. When the deep groove ball bearing has a large radial clearance, has the performance of angular contact bearings, can withstand a large axial load, deep groove ball bearing friction coefficient is very small, the limit speed is also very high.

Bearing characteristics
Deep groove ball bearings are the most representative rolling bearings and are widely used. They are suitable for operation at high or even very high speeds and are very durable, requiring no frequent maintenance. These bearings have a low coefficient of friction, high limiting speeds, simple structure, low manufacturing costs and high manufacturing accuracy. Size range and form varies, used in precision instruments, low noise motors, automobiles, motorbikes and general machinery and other industries, is the most widely used in the mechanical industry of a class of bearings. Mainly bear radial load, can also bear a certain amount of axial load.

Select a larger radial clearance when the axial load carrying capacity increases, bear pure radial force when the contact angle is zero. When there is an axial force, the contact angle is greater than zero. The general use of stamping wave-shaped cage, car entity cage, sometimes also use nylon frame.

Deep groove ball bearings mounted on the shaft, in the bearing axial clearance range, can limit the axial displacement in both directions of the shaft or shell, so can be in both directions for axial positioning. In addition, this kind of bearing also has certain centring ability, when relative to the shell hole tilt 2′~10′, still can work normally, but on the bearing life has certain influence. Deep groove ball bearing cage is mostly steel plate stamping wave-shaped cage, large bearings are mostly used in car-made metal entity cage.

Deep groove ball bearing is the most commonly used rolling bearing. Its structure is simple and easy to use. Mainly used to bear radial load, but when increase bearing radial clearance, has certain angular contact ball bearing performance, can bear radial, axial joint load. In the high speed and should not use thrust ball bearings, also can be used to bear pure axial load. With the deep groove ball bearing specification size of the same other types of bearings, such bearings friction coefficient is small, limit speed is high. However, they are not shock-resistant and are not suitable for bearing heavy loads.

Bearing construction
Deep groove ball bearing structure is simple, compared with other types is easy to achieve high manufacturing accuracy, so it is convenient to become a series of mass production, manufacturing cost is also lower, the use of extremely common. Deep groove ball bearings in addition to the basic type, there are a variety of variants of the structure, such as: deep groove ball bearings with dust cover, deep groove ball bearings with rubber seals, deep groove ball bearings with stopping grooves, deep groove ball bearings, there are loading notch large load capacity deep groove ball bearings, double row deep groove ball bearings.

Bearing type
1、Single row deep groove ball bearings

2、Single row deep groove ball bearing with dust cover

3、Single row deep groove ball bearings with dust cover and sealing ring

4、Single row deep groove ball bearings with stop groove and stop ring on outer ring

5、Deep groove ball bearings with ball loading notch

6、Double row deep groove ball bearing

According to the size of deep groove ball bearings can be divided into.

(1) miniature bearings ---- nominal outside diameter size range of 26mm or less bearings.

(2) Small-sized bearings---- bearings with nominal outside diameter ranging from 28-55mm; (3) Small and medium-sized bearings---- bearings with nominal outside diameter
ranging from 28-55mm.

(3) Small and medium-sized bearings ---- bearings with nominal outside diameter ranging from 60-115mm; and

(4) Medium and large-sized bearings ---- bearings with nominal outside diameter ranging from 120-190mm

(5) Large-sized bearings ---- bearings with nominal outside diameter ranging from 200-430mm.

(6) Extra large bearings ---- bearings with nominal outside diameter ranging from 440mm and above.

Uses and Applications
Deep groove ball bearings can be used in gearboxes, instruments, motors, household appliances, internal combustion engines, transport vehicles, agricultural machinery, construction machinery, engineering machinery, roller skates, yo-yo and so on.

Installation method
Deep groove ball bearing installation method a: press fit: bearing inner ring and shaft to make tight fit, outer ring and bearing hole is loose fit, can be used to press the bearing first pressure mounted on the shaft, and then the shaft together with the bearing into the bearing hole, pressure mounting in the bearing inner ring on the end face, pad a soft metal material to do the assembly of casing (copper or soft steel), bearing outer ring and bearing hole with the bearing hole tight fit, the inner circle and the shaft for the looser fit, can be pressed into the bearing hole first, can be used to press the bearing into the bearing hole first. The bearing can be pressed into the bearing hole first, then the outer diameter of the assembly sleeve should be slightly smaller than the diameter of the hole. If the bearing collar and shaft and seat hole are tight fit, the installation of the inner ring and outer ring should be pressed into the shaft and seat hole at the same time, the structure of the assembly casing should be able to simultaneously bet on the bearing inner ring and outer ring of the end face.
Deep groove ball bearing mounting method two: heating fit: by heating the bearing or bearing housing, using thermal expansion will be tight fit into loose fit mounting method. It is a commonly used and labour-saving installation method. This method is suitable for the installation of large amount of interference bearings, hot installation of bearings or separable bearings before the collar into the oil tank uniformly heated 80-100 ℃, and then removed from the oil as soon as possible mounted on the shaft, in order to prevent the cooling of the inner ring end face and the shoulder of the shaft fit is not tight, the bearing can be cooled and then axial fastening. When the outer ring of the bearing is tightly fitted with the bearing housing made of light metal, the hot-fitting method of heating the bearing housing is adopted to avoid scuffing of the fitted surface. When heating the bearing with oil tank, there should be a mesh fence at a certain distance from the bottom of the box, or use a hook to hang the bearing, the bearing can not be put on the bottom of the box to prevent the sinking impurities into the bearing or uneven heating, there must be a thermometer in the oil tank, strict control of the oil temperature should not be more than 100 ° C, in order to prevent the occurrence of the tempering effect, so that the hardness of the collar is reduced.

Common difference (of an arithmetic series)
Standard deep groove ball bearings have common grade, all of which conform to GB307.1.

Clearance
Standard deep groove ball bearings have C2, standard (CN), C3, C4 and C5 levels of internal clearance, all in line with GB4604.

Cage
Deep groove ball bearings generally use steel plate stamping cage or brass entity cage. When the outer diameter is less than 400 mm, the use of steel plate stamping cage without rear code, when the outer diameter is greater than 400 mm when more brass entity cage without rear code.
Bearing three kinds of processing form
Deep groove ball bearing parts processing form as follows.

1、Multi-process processing: general bearing production needs 20~40 process, more than 70.

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

3, precision machining: the vast majority of the surface of the bearing parts to go through the grinding process, grinding dimensions and geometric accuracy are μm as a unit.
Attention
Deep groove ball bearings, running bearing load is too small, will make the ball and raceway sliding, become the cause of abrasion. In particular, large deep groove ball bearings with large ball and cage weights have this tendency. It is expected that there will be too small a load in use, and you should contact the relevant personnel in time when selecting bearings!

Causes of corrosion
In many cases, bearings will occur rust phenomenon, leading to bearing corrosion for many reasons, the most common in our daily life are mainly the following factors.
1)Due to poor sealing device, it is invaded by moisture, dirt and so on;.

2)Bearings are not used for a long time, more than the anti-rust period, lack of maintenance.

3)Roughness of the metal surface is large; and

4)Contact with corrosive chemical media, bearing cleaning is not clean, the surface of the dirt stained, or with sweaty hands in contact with the bearings, bearings after cleaning, not timely packaging or installation, long-term exposure to the air, by the air moisture invasion and staining;.

5) Environmental temperature and humidity and contact with various environmental media; rust inhibitor failure or quality does not meet the requirements.

Deep groove ball suffix meaning
CN: Common group radial clearance; usually used only in combination with the following letters to indicate a narrower or offset clearance range
H: Narrowed clearance range, equivalent to the upper half of the original clearance range.
L: narrowed clearance range, corresponding to the lower half of the original clearance range
P: offset clearance range, equivalent to the composition of the upper half of the original clearance range and the lower half of the next set of clearance ranges The above letters are also applicable in the sense of combining them with the following clearance groups: C2, C3, C4, and C5, e.g., C2.
C2: radial clearance less than normal group
C3: radial clearance greater than normal group
C4: radial clearance greater than C3
C5: radial clearance greater than C4
DB：Two single-row deep groove ball bearings paired in a back-to-back manner
DF：Two single row deep groove ball bearings paired in face-to-face manner
DT：Two single deep groove ball bearings paired in tandem
E：Enhanced design
GJN: Polyurea-based grease, NLGI consistency 2, temperature range -30 to +150 degrees Celsius (standard filling level).
GXN: Polyurea-based grease, NLGI consistency 2, temperature range -40 to +150 °C (standard filling level)
J: Stamped steel cage
LHT23: Lithium grease, NLGI consistency 2, temperature range -50 to +140°C (standard filling level)
LT: Lithium grease, NLGI consistency 2, temperature range -55 to +110 °C (standard filling quantity)
LT10: Lithium grease, NLGI consistency 2, temperature range -50 to +90 °C (standard filling level)
M: Machine-cut brass cage with steel ball guide. Different designs and materials are identified by a number after M, e.g. M2.
MA: Machined brass cage, outer ring guided
MB: Machined brass cage, inner ring guide.
MT33: Lithium grease, NLGI consistency 3, temperature range -30 to +120°C (standard filling level)
MT47: Lithium grease, NLGI consistency 2, temperature range -30 to +110 °C (standard filling)
N: Outer ring with stop groove
NR: Outer ring with stop groove and stop ring
N1: outer ring with grooves on the side (for fitting stops to prevent rotation of the outer ring)
P5: Dimensional and rotational accuracy in accordance with ISO tolerance class 5.
P6: Dimensional and rotational accuracy according to ISO tolerance class 6
P52: P5+C2
P62: P6+C2
P63: P6+C3
RS1: Nitrile butadiene rubber (NBR) contact seal with steel backbone on one side
RSH: Nitrile butadiene rubber (NBR) contact seal with steel backbone on one side
RSL: Nitrile Buna-N (NBR) low friction seal with steel backbone on one side
RZ: Nitrile Buna-N (NBR) low friction seal with steel backbone on one side
TH: Fibre-reinforced phenolic resin cage (snap type)
TN: Injection moulded nylon cage
TN9: Injection moulded glass fibre reinforced nylon 6, 6 cage
VL0241: outer ring outer surface with aluminium oxide coating, insulation capacity up to 1000VDC
VL2071: inner ring outer surface with aluminium oxide coating, insulation capacity up to 1000VDC
WT: Polyurea-based grease, NLGI consistency 2, temperature range -40 to +160°C (standard filler level).
Y: Stamped copper cage
Z: One side with stamped steel dust cap
ZNR: outer ring with stop groove and stop ring, other side of stop groove with stamped steel dust cap
2RS1: Nitrile rubber (NBR) contact seal retainer with steel backbone on both sides
2RSH: Nitrile rubber (NBR) contact seals with steel backbones on both sides
2RSL: Nitrile (NBR) low friction seals with steel backbones on both sides
2RZ: Nitrile (NBR) low friction seal with steel backbone on both sides
2Z: Stamped steel dust cap on both sides
2ZNR: outer ring with stop groove and stop ring, with stamped steel dust cap on both sides
Commonly used suffixes with ball mounting notches:

C3: Radial clearance greater than normal group
N: outer ring with stop groove
NR: outer ring with stop groove and stop collar
Z: with stamped steel dust cap on one side
ZNR: outer ring with stop groove and stop ring, the other side of the stop groove with stamped steel dust cap
2Z: with stamped steel dust cap on both sides
2ZNR: outer ring with stop groove and stop ring, both sides with stamped steel dust caps
Meaning of the stainless steel suffix:
R: outer ring with flange
VT378: non-toxic grease (incidental contact with food ingredients)
2RS1: Nitrile butadiene rubber (NBR) contact seal with steel backbone on both sides
2Z: Stamped steel dust cap on both sides
2ZR: Stamped steel dust cap on both sides and flanged outer ring

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