hardchnballbearings

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ZXZC 63 Series Deep Groove ball bearings

Basic bearing No 6300

Bore d 10mm

Outer diameter D 35mm

Width B 11mm

Radius rsmin 0.6mm

Dynamic 7.65cr

Staric Cor 3.48

Grease 22000 r/min

Oil   26000 r/min

Low vibration, low noise. Suitable for bad and complicated environment. Precision level all over P5

Mechanical Bearing 6300  deep groove ball bearings

Mechanical Bearing 6300 are packed in plastic tubes or polythene bags,and then in carton boxes industrial packing is also available. Special requirements should be mentioned in order.

The rings and ball of ZXZC deep groove ball bearings aremade of refined high chrome bearings steel (AISI52100) of staingless stee(AlSI440C).The cages are made of lowcarbon steel Spcc or Nylon A3HC5 Other materials is available for specific use in order.

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What inspections need to be done after  ZXZC bearing installation | High speed bearing Manufacturers

Usually the space in which the bearing can be installed is limited. In most cases, the shaft diameter (or bearing inner diameter) is based on mechanical design or other design constraints. Therefore, the choice of bearing type and size from  High speed bearing Manufacturers Ningbo Hardchn bearing Co., Ltd. is determined according to the inner diameter of the bearing. Therefore, the main dimension tables of standard bearings are compiled according to the international standard inner diameter dimensions.

There are many sizes of standard bearings. Standard bearings are used in the design of mechanical devices. The nature, size, and direction of the load on the bearing and the load on the bearing are changeable. Normally, the rated basic load is displayed on the dimension table. But axial load and radial load, etc. are also important factors in choosing a suitable bearing. When the size of the ball and needle roller bearings are the same, the needle roller bearings usually have a higher load capacity and can withstand greater vibration and shock loads.

After the ZXZC bearing is installed, in order to check whether the installation is correct, it is necessary to perform a running check. Small machines can be rotated by hand to confirm whether they rotate smoothly. The inspection items include improper operation due to foreign objects, scars, and indentations, unstable torque due to poor installation and poor processing of the mounting seat, excessive torque due to too small clearance, installation error, and seal friction, etc. Wait. If there is no abnormality, power operation can be started.

Large-scale machinery cannot be rotated manually, so immediately cut off the power after starting without load, and the machinery is idling. Check for vibration, noise, and contact with rotating parts. After confirming that there is no abnormality, enter the power operation.

The power operation starts at a low speed with no load and slowly increases to the rated operation under the specified conditions. The items to be checked during the test run are whether there is abnormal sound, bearing temperature change, lubricant leakage or discoloration, etc. If an abnormality is found, the operation should be stopped immediately, the machine should be checked, and the bearing should be removed for inspection if necessary.

Bearing temperature can generally be estimated by High speed bearing Manufacturers based on the external temperature of the bearing seat. However, it is more accurate to use the oil hole to directly measure the temperature of the outer ring of the bearing. The bearing temperature gradually rises from the start of operation, and usually stabilizes after 1 to 2 hours. If the bearing is installed improperly, the temperature will rise sharply, resulting in abnormally high temperature. The reasons include too much lubricant, too small bearing clearance, poor installation, and too much friction in the sealing device. In the case of high-speed rotation, the wrong choice of bearing structure and lubrication method is also the reason.

The rotation sound of the bearing is checked with a stethoscope, etc. Strong metal noise, abnormal sound, irregular sound, etc. indicate abnormalities. The reasons include poor lubrication, poor shaft or bearing seat accuracy, bearing damage, and foreign matter intrusion.

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What are main Characteristics of  62 Series Ball Bearings

The radial internal clearcnces of ZXZC 62 Series Ball Bearings( Mechanical Bearing 624 )are according with National standard GB/T4604（which is adopted ISO5753 equivalently) Dividing into five groups as shown in the following table.

Mechanical Bearing 624 are packed in plastic tubes or polythene bags,and then in carton boxes industrial packing is also available. Special requirements should be mentioned in order.

The high standard achieved ensures that every compoment from our fully automated factories will meet the critical standards set by our customers and quality assurance. Authorities of ISO-9001, TS16949 respectively.

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How are ZXZC deep groove ball bearings produced

How are ZXZC deep groove ball bearings manufactured? How is the steel ball placed on the outside of the rolling bearing, with the inner hole in the middle?

In the field of rolling bearing manufacturing, the process of placing the steel ball in the middle of the inner and outer rings is called "installation" or "fitting". Its specific process is as follows:

1. Prepare the inner and outer rings, and place the inner hole on one side;

2. Put in the bearing steel ball;

3. To divide the ball, the steel ball of the bearing is evenly separated by a ball divider with a small front paw;

4. Place the supporting frame and riveting the two supporting frames together.

There are also full packs in specific manufacturing, but usually there are vacancies for ball loading. Full packs are still used less; it can be seen that there are vacancies for loading balls on one side, and the bearing steel balls are filled in from this vacancy. However, the working capacity of this type of bearing under radial load is relatively small, so it is not used much.

First, the groove half-warp of the inner and outer rings is slightly larger than the ball half-warp, and the main rolling bearing has a radial load.

Secondly, in addition to open bearings, bearings with thick steel plate dust jackets and capacity grid rubber seals, and bearings containing non-contact rubber seal bearings, or rings with ring bearings in the diameter.

Then, use appropriate high-quality lubricating grease for rolling bearings with dust boots or seal rings. Deep groove ball bearings generally use thick steel stamping die retainers, which have low friction torque and an accuracy level of 0.

Let's take ZXZC deep groove ball bearings as an example. Deep groove ball bearings are divided into three categories.

The first is the dust cover type, which has a small frictional torque, good high-speed performance, and poor water solubility.

The second is the type of non-contact rubber sealing ring, which has low friction torque, excellent speed, stronger dust resistance, and unsuitable water resistance.

Then there is the capacity grid rubber sealing ring, which has a small frictional torque, great speed, good dust resistance, and is particularly outstanding in terms of waterproofing.

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What are the differences between deep groove ball bearings and cylindrical roller bearings

Ningbo Hardchn bearing Co., Ltd. Deep groove ball bearings (single-row radial ball bearings) are the most widely used rolling bearings. It is characterized by low frictional resistance and high speed. It can be used on parts that bear radial load or a combined load that acts on both radial and axial directions. It can also be used on parts that bear axial load, such as low-power motors, Automobile and tractor gearboxes, machine tool gearboxes, general machines, tools, etc.

Cylindrical roller bearing: The rolling element is a radial rolling bearing with cylindrical rollers. The internal structure of the cylindrical roller bearing adopts the parallel arrangement of the rollers, and the spacers or spacers are installed between the rollers, which can prevent the inclination of the rollers or the friction between the rollers, and effectively prevent the increase of the rotation torque.

Similarities between the two

Both deep groove ball bearings and cylindrical roller bearings mainly bear radial loads and can bear a small part of axial loads.

The difference between the two

1. The deep groove ball bearing has a high limit speed, a relatively large axial load bearing capacity, and a relatively small radial load bearing capacity.

2. The operating limit speed of cylindrical roller bearings is not as high as that of deep groove ball bearings, and can basically not bear the axial load, but the radial load bearing capacity is relatively large.

How to choose between the two?

Cylindrical roller bearings are preferred under low-speed and heavy-load conditions, and Hardchn (ZXZC) deep groove ball bearings are preferred under high-speed and light-load conditions.`

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Low noise long life 607ZZ stainless steel thin-walled ball bearings | Mechanical Bearing 607

Brand ZXZC

Model 607ZZ

Inner diameter 7 (mm)

Outer diameter 19 (mm)

Thickness 6 (mm)

Weight 0.007 (kg)

Cage and its material Bearing steel

Use characteristics

Use Household appliances

Number of rolling element rows Single row

Raceway type Deep groove raceway

Sample or spot spot

Bearing material high temperature bearing steel

Rolling element type ball

Low vibration, low noise. Suitable for bad and complicated environment. Precision level all over P5

ZXZC Mechanical Bearing 607 are packed in plastic tubes or polythene bags,and then in carton boxes industrial packing is also available. Special requirements should be mentioned in order.

The high standard achieved ensures that every compoment from our fully automated factories will meet the critical standards set by our customers and quality assurance. Authorities of ISO-9001, TS16949 respectively.

Products of Ningbo Hardchn bearing Co., Ltd. cover almost all applicable fields of equipment manufacturing and machinery manufacturing industry, mainly railway railways, trucks, construction machinery, mining machinery, forklifts, agricultural machinery, ships, petroleum machinery, construction, power accessories, electromechanical, Hardware tools and other industries.

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What should be paid attention to in bearing inspection | ZXZC Bearing

1. Bearing quality

First of all, check whether the lubricating grease has bad conditions such as deterioration, agglomeration, impurities, etc. This is an important basis for judging the cause of bearing damage.

Secondly, check the bearing for bite damage and wear; check the surface finish of the inner and outer rings, rolling elements, and cage of the bearing as well as whether there are defects such as cracks, rust, peeling, pits, overheating and discoloration, and measure whether the bearing clearance exceeds the standard; check Whether the shaft sleeve is worn, pits, peeling, if any of the above conditions should be replaced with new bearings.

2. Matching of bearings

When the bearing is installed, the matching between the inner diameter of the bearing and the shaft, the outer diameter and the housing is very important. When the fit is too loose, the mating surface will have relative sliding, which is called creep. Once creep occurs, the mating surface will be worn and the shaft or shell will be damaged, and the wear powder will penetrate into the bearing, causing heat, vibration and damage. When the interference is too large, the outer diameter of the outer ring will decrease or the inner diameter of the inner ring will increase, reducing the internal clearance of the bearing. In order to select a suitable bearing, various factors such as the nature of the bearing load, the size, temperature conditions, and the rotation of the inner and outer rings must be considered.

3. Adjustment of bearing clearance

If the bearing clearance is too small, due to the excessive shear friction loss of the grease in the clearance, it will also cause the bearing to heat up. At the same time, the clearance is too small, the oil volume will be reduced, too late to take away the heat generated by friction, which will further increase the temperature rise of the bearing .

However, excessive clearance will change the dynamic characteristics of the bearing and cause unstable operation of the rotor. Therefore, it is necessary to select the verified bearing clearance for different equipment and use conditions.

Ningbo Hardchn bearing Co., Ltd now has the production capacity of bearing from the rough matching, heat treatment, ultrafine grinding to complete the whole process of product assembly, and outputs 100 million sets of bearing products, 120 million sets of bearing rings annually Production of own brand "ZXZC" series miniature bearings won excellent quality and praise, hardchn has become to many well-known domestic and foreign manufactories designated supplier.

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How to solve the problem of excessive bearing temperature

Ningbo Hardchn bearing Co., Ltd.When the bearing temperature is high, the problem should be solved from the following aspects.

1. When the amount of oil is improper, too much or too little grease

The bearing box should be oiled regularly in accordance with the requirements of the work. High temperature sometimes occurs after the bearing is refueled, mainly due to excessive refueling. At this time, the phenomenon is that the temperature continues to rise, and after reaching a certain point (usually about 10°C~15°C higher than the normal operating temperature), it will remain unchanged, and then gradually drop.

2. When the added grease does not meet the requirements or is contaminated

The selection of lubricating grease is improper, it is not easy to form a uniform lubricating film, and it cannot reduce the friction and wear inside the bearing. The lubrication is insufficient and the bearing temperature rises.

When different types of grease are mixed, a chemical reaction may occur, causing the grease to deteriorate, agglomerate, and reduce the lubricating effect.

Contaminated grease will also increase the temperature of the bearing. Dust will fall into the grease during the process of adding grease, causing grease pollution, resulting in the deterioration of grease in the bearing box, destroying the lubrication of the bearing, and increasing the temperature.

Therefore, suitable grease should be selected, the bearing box and bearings should be cleaned during maintenance, and the fueling pipeline should be inspected and dredged. Different types of greases are not allowed to be mixed; if you replace other types of grease, you should clean up the original grease; operation and maintenance regular Add grease, and grease should be properly kept for moisture and dust prevention measures.

3. When the cooling is insufficient

Check whether the pipeline is blocked, whether the inlet oil temperature and return water temperature exceed the standard. If the cooler is not properly selected and the cooling effect is poor, and cannot meet the requirements of use, it should be replaced in time or a new cooler should be installed in parallel. The axial flow induced draft fan should also check the insulation and sealing of the core tube.

4. When there is no problem in the above aspects, check the coupling

The alignment of the coupling must conform to the process standard. The thermal expansion of the equipment during operation should also be considered when aligning axial-flow induced draft fans and fluid couplings. Due to thermal expansion on the impeller side of the induced draft fan, the bearing box rises; the temperature rises during the operation of the fluid coupling, the bearing box expands, and the bearing rises. Therefore, the motor should be higher when aligning. The size of the reserve depends on the characteristics and Depending on the temperature parameters during operation.

If you have any questions about  motor bearings ,please contact Ningbo Hardchn bearing Co., Ltd.

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Cleaning method of vibration motor bearing | China motor bearing manufacturers ZXZC

When cleaning the centripetal spherical bearing of an old motor or an imported motor, the balls, the ball frame, and the inner ring should be rotated laterally from the outer ring and then immersed in hot oil. The rollers should also be cleaned when cleaning short cylindrical roller bearings. , Bead frame, inner ring and outer ring are separated.

During hot oil cleaning, the temperature of the oil should not exceed 20°C.

1. Hot oil cleaning method. Because of the long-term use, the bearing hardened by soft dry oil or anti-rust paste should be immersed in hot engine oil at 100-200℃, clamp the bearing with pliers, and clean the grease on the bearing with a brush. The soft dry oil or anti-rust paste will melt when heated to 100-200℃, and it will be easily washed out from the gap of the bearing. Sometimes just shake the bearing several times in the oil. The oil will also flow away from the crevices.

2. General cleaning method Put the bearing in kerosene for 5-10 minutes, pinch the inner ring with one hand and rotate the outer ring with the other hand, the dry oil or anti-rust paste on the bearing will fall off. Then put the bearing in clean kerosene, scrub with a soft brush, wash the balls and the oil in the gap, put it in gasoline and clean it once, take it out and place it on a clean paper. When cleaning radial spherical ball bearings and short cylindrical roller bearings, the balls, ball cage, inner ring and outer ring should be separated for cleaning.

The bearing mounted on the shaft is cleaned mainly by spraying oil or spraying with an oil gun. The oil that is easy to be cleaned should be kerosene and then gasoline; the oil that is difficult to clean should be rinsed with hot engine oil at 100-200℃. Or spray with oil gun and clean with gasoline. Be careful not to scrape the bearings with sharp tools: hard grease or rust, so as not to damage the smoothness of the bearing rolling elements and groove ring parts, clean the vibrating motor bearings with a clean cloth.

Ningbo Hardchn bearing Co., Ltd is a professional China motor bearing manufacturers. ZXZC produces manufacture bearings and ferrules set and provides development production, sales and international business services.

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What are the characteristics of deep groove ball bearings

Hardchn Deep groove ball bearings are symbolic rolling bearings, and their main uses are widespread. It is suitable for high-speed rotation and even extremely high-speed rotation operation, and is very durable, without frequent maintenance. This kind of bearing has low friction resistance, high limit speed ratio, simple structure, low production cost, and high production precision.

There are various types of specifications and methods, which are used in the fields of fine instrument panels, low-noise motors, cars, motorcycles and general mechanical equipment. They are a more common type of bearing used in mechanical engineering.

The key is to bear radial load, and it can also bear a certain amount of axial load. When a large radial backlash is selected, the axial bearing capacity is increased, and the interfacial tension is zero when bearing pure radial force. When there is axial force function, the interfacial tension exceeds zero. Generally, the wave cage is used. 

The deep groove ball bearing from cnzxzc.com is installed behind the shaft. Within the axial backlash of the bearing, the axial deviation of the shaft or the housing can be limited in two directions, so it can be accurately positioned in the double axis. . In addition, this type of bearing also has a certain degree of self-aligning ability. When the relativity is skewed by 2'～10' with the housing hole, it can still work normally, but it will harm the service life of the bearing. Deep groove ball bearing cages often see wave-shaped cages, and large and medium-sized bearings mostly use car-made metal material solid wire cages.

Hardchn deep groove ball bearings are the most common rolling bearings. Its structure is simple and convenient to use. The key is to bear radial load, but when the radial backlash of the bearing is enlarged, it has certain characteristics of angular contact ball bearing and can bear the coordinated radial and axial load. When the speed is relatively high and the thrust ball bearing is not suitable for selection, it can also be used to bear pure axial load. Compared with other types of bearings with the same specifications and specifications as deep groove ball bearings, this type of bearing has low friction resistance and high limit speed ratio. But it is not impact resistant and not suitable for heavy loads.

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How to judge whether deep groove ball bearings can continue to be used | ZXZC Ball Bearing

Many customers do not judge the availability of deep groove ball bearings, and overuse deep groove ball bearings, causing losses to manufacturers. So in this article, Ningbo Hardchn bearing Co., Ltd. will teach you how to distinguish whether deep groove ball bearings can continue to be used.

We have to judge whether deep groove ball bearings can continue to be used, mainly from the bearing mechanical properties, damage degree, importance, operating conditions and the period to the next maintenance. Generally speaking, if the bearing has several conditions, it should be replaced with a new bearing and can no longer be used.

1. There is rust and scratches on the raceway surface and rolling elements.

2. There is a break on any one of the ring and rolling element.

3. There are cracks or gaps on any of the inner ring, outer ring, rolling element, and cage.

4. The cage is obviously worn or the rivet is obviously loose.

5. Discoloration caused by heat is obvious.

6. The inner diameter surface of the inner ring or the outer diameter surface of the deep groove ball bearing has obvious creep.

7. Bearings filled with grease, seal rings or dust caps are obviously damaged.

8. There are obvious scratches on the rolling surface, ribs and rolling elements.

9. There are serious indentations and marks on the raceway surface and rolling elements.

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Features of ZXZC Mechanical Bearing PCN26

The rings and ball of ZXZC deep groove ball bearings aremade of refined high chrome bearings steel (AISI52100) of staingless stee(AlSI440C).The cages are made of lowcarbon steel Spcc or Nylon A3HC5 Other materials is available for specific use in order.

Standard & Tolerrance class

GB/T307.1 PO P6 P5 P4

IS0492 C LASSO CLASS6 CLASS5 CLASS4

AFBMA STD.20 ABEC1 ABEC3 ABEC5 ABEC7

Mechanical Bearing PCN26 are packed in plastic tubes or polythene bags,and then in carton boxes industrial packing is also available. Special requirements should be mentioned in order.

The accuracy of ZXZC deep groove ball bearings (Mechanical Bearing PCN26) are divided into four grades of tolerances with national standard GB/T307. 1 which compared with the ISO and AFBMA standard.etc is in the following table.

ZXZC deep groove ball bearings feature low vibration and noise.Bearings conforming to standard EMQ are supplied for customers.

Hardchn is leading Mechanical Bearing PCN26 factory and Mechanical Bearing PCN26 company in China, we offer kinds of solution for high quality Mechanical Bearing PCN26. Check our bearing manufacturing workshop and detailed bearing structure.

The high standard achieved ensures that every compoment from our fully automated factories will meet the critical standards set by our customers and quality assurance. Authorities of ISO-9001, TS16949 respectively.

Bearings are filled with oil or grease when they are delivered.These bearings are suitable use at working temperature of -50℃ to 200℃ . Specific brands of oil or grease available which is stipulated in the contract.

Details: https://www.cnzxzc.com/product/non-standard-series/mechanical-bearing-pcn26.html

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How to check ZXZC/Hardchn motor bearings

1. Before inspecting the ZXZC motor bearing, first remove the old grease from the bearing dust cover, and then clean the inner and outer small covers of the bearing with gasoline. After cleaning, clean the toothbrush bristles or cotton fibers and do not need to be left in the bearing.

2. Carefully inspect the  Hardchn motor bearings after cleaning. The bearings should be cleaned intact, free from over-temperature, cracks, molting, groove marks, residues, etc., the inner and outer raceways are smooth, and the gaps in each part are qualified. If the support frame is loose, the support frame and the bearing When the sleeve is rubbed, the bearing should be removed and replaced.

3. The repaired bearing should rotate flexibly without jamming.

4. Check that the inner and outer small caps of the Hardchn bearing should not be worn out. If there is wear, it should be found out and resolved.

5. The matching between the inner pad of the ZXZC bearing and the shaft should be tightened, otherwise it should be solved.

6. When installing a new Hardchn motor bearing, use oil heating or vortex method to heat the bearing. The heating temperature should be 90～100℃. Put the motor bearing on the motor shaft at high temperature, and ensure that the bearing is installed in time. No heat is allowed. Add the bearing to prevent damage to the bearing.

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Deep Groove Ball Bearings Suppliers | Prevention of shaft current

How is the shaft current generated?

The motor has a current-carrying wire and a magnetic circuit structure, which usually causes the magnetization of the shaft or causes pulsating magnetic flux. The pulsating magnetic flux induces a voltage in the circuit formed by the shaft, bearing, and casing, so shaft current flows through the circuit, and the surface of the shaft and sliding bearing bush, or the surface of the rolling bearing and the bearing sleeve is damaged. The appearance is that friction and heat increase, and the rolling bearing is damaged. Deterioration of running performance, etc.

What performance of the motor will be affected by the shaft current?

Shaft voltage and closed circuit are necessary conditions for the formation of shaft current. Shaft voltage occurs during the operation of the motor, including the potential difference between the two ends of the shaft, part of the shaft, and the shaft to ground. The direct attack object of the shaft voltage is the bearing system. When the voltage reaches a certain value, the lubricating oil film in the bearing will be broken down, thus forming a closed loop, that is, shaft current is generated. Low voltage and large current are one of the characteristics of shaft current. Due to the effect of shaft current, it will cause heating problems. , Which makes the bearing grease degrade and fail due to high temperature. The bearing is in a state of intermittent dry grinding, which causes the bearing itself to burn and even sintering adhesion between the bearing and the shaft. The electric corrosion of the bearing caused by the shaft current is an accelerated process. The appearance is not very obvious. Later, it transitioned to bearing noise, and finally the bearing fell apart and burned due to the damage of related parts. This process is related to the operating characteristics of the motor and the severity of the shaft current. Some time is longer, some may be Only a few hours.

Prevention of shaft current

In order to reduce the harm of shaft current, it is necessary to take corresponding measures according to the quality of the variable frequency power supply, the size of the motor, the type of bearing and the size of the shaft voltage of the motor, etc., to extend the operating life of the bearing and improve the reliability of the motor operation. There are many preventive measures, which can be adopted, such as shaft insulation, bearing insulation, bearing sleeve insulation, and the necessary auxiliary measures to adjust the balanced ground voltage. Regardless of the measures, the basic principles can be attributed to these two, one It is to cut off the circuit, and the other is to eliminate the shaft voltage. The method of bearing insulation is relatively a once and for all method.

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ZXZC Stainless Mechanical Bearing 6800 zz 2rs Tpx Craft Ball Bearing For Global Industrial Market

The rings and ball of ZXZC Mechanical Bearing 6800 are made of refined high chrome bearings steel (AISI52100) of staingless stee(AlSI440C).The cages are made of lowcarbon steel Spcc or Nylon A3HC5 Other materials is available for specific use in order. 

Applicable Industries: Machinery Repair Shops

Bore Size: 4 - 10 mm

Model Number: 6800

Precision Rating: ABEC- 1 ABEC-3 ABEC-5 ABEC-7

Seals Type: ZZ/2RS

Number of Row: Single Row

Place of Origin: Zhejiang, China

Material: Chrome Steel GCR15

Application: Machinery

Feature: Low Noise. Long Life .High speed

Cage: Steel Cage Nylon Cage

Lubrication: Grease

MOQ: 10000 Pices

Certificate: ISO9001 SGS

Package: Plastic tube+Carton+Pallet

Vibration: V1 V2 V3 V4

Delivery Time: 10 Days

The high standard achieved ensures that every compoment from our fully automated factories will meet the critical standards set by our customers and quality assurance. Authorities of ISO-9001, TS16949 respectively.

ZXZC Mechanical Bearing 6800 feature low vibration and noise.Bearings conforming to standard EMQ are supplied for customers.

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What are the material factors that affect the friction of double row deep groove ball bearings

1. Material factors affecting the friction of double row deep groove ball bearings

The matching function of the double row deep groove ball bearing for motor bearing company (Ningbo Hardchn bearing Co., Ltd.) is to make the stationary ring and rotating ring of the bearing solidify with the stationary part (usually the bearing seat) and the rotating part (usually the shaft) of the installation part, so as to realize the rotating state The basic task of transferring loads and defining the position of a moving system relative to a stationary system.

On the shaft and in the bearing seat, the bearing is required to fix its position in the radial, axial and tangential directions. Radial and tangential positioning are achieved by the tight fit of double row deep groove ball bearing rings. Axial positioning only uses tight fit in a few cases; generally axial limiting parts such as end caps and retaining rings are used Limit the axial position within the clearance range.

2. Material factors of double row deep groove ball bearings that affect the friction compatibility of friction pairs

Double row deep groove ball bearings prevent adhesion and form boundary lubrication when the shaft diameter is in direct contact with the bearing shell.

The material factors that affect the friction compatibility of the friction pair are:

(1) The degree of difficulty of forming an alloy metallurgically in the secondary material.

(2) The affinity of materials and lubricants.

(3) The friction factor of the paired materials in the non-lubricated state.

(4) The microstructure of the material.

(5) The thermal conductivity of the material.

(6) The size of the surface energy of the material and the characteristics of the oxide film.

Use an oil pump to inject high-pressure oil into the bearing through a nozzle, and the oil injected into the bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at a high speed, the rolling elements and the cage also make the surrounding air form an air flow at a relatively high rotation speed. It is difficult to send the lubricating oil to the bearing by the general lubrication method. At this time, the lubricating oil must be sprayed by the high-pressure injection method. In double row deep groove ball bearings, the nozzle position should be placed between the inner ring and the center of the cage.

You can find more info here: https://www.cnzxzc.com/

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Single Row Bearings 635zz 2rs Bearings Used For Skateboard And Automotive

Type:Ball Bearings 635

Structure:Deep Groove

Applicable Industries:Machinery Repair Shops

Bore Size:4 - 5 mm

Model Number:635

Precision Rating:ABEC-3/ABEC-5

Seals Type:ZZ/2RS

Number of Row:Single Row

Place of Origin:CN;ZHE

Material:Chrome Steel GCR15

Application:Machinery

Feature:Low Noise. Long Life .High speed

Cage:Steel Cage Nylon Cage

Lubrication:Grease

MOQ:10000 Pices

Certificate:ISO 9001 SGS

Package:Plastic tube+Carton+Pallet

Vibration:V1 V2 V3 V4

Delivery Time:10 Days

The rings and ball of ZXZC Mechanical Bearing 635 aremade of refined high chrome bearings steel (AISI52100) of staingless stee(AlSI440C).The cages are made of lowcarbon steel Spcc or Nylon A3HC5 Other materials is available for specific use in order.