Double Row Bearing Deep Groove Ball Bearing

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Product Description:

4312 ZZ double row bearing deep groove ball bearing

Deep groove ball bearings are particularly versatile. They are simple in design, non-separable, suitable for high and very high speeds and are robust in operation, requiring little maintenance. Because deep groove ball bearings are the most widely used bearing type, they are available from TIANHE in many designs, variants and sizes.

In addition to the bearings presented in this section, deep groove ball bearings for special applications are shown under Engineered products.



1.PTFE with fibre 0.01~0.03mm 

2.Porous bronze 0.2~0.3mm 

3.Steel backing 0.7~2.3mm 

4.Tin-plating 0.005mm or copper plating 0.008mm 



Load capacity               140N/mm2 

Temperature                 -195°C ~ +280°C 

Speed limit                    5m/s 

Friction coef(u)              0.04~0.20 

PV Limit(Dry)                 3.6N/mm2 .m/s 



1.PTFE and fibre can protect the shaft while in operation. 

2.It is suitable for the machine required harmless to people because 

of Lead-free. 

3.Goodload capacity and anti-wear. 

4.Bronze and steel have good thermal conductivity. 

5.Anti-corrosion because of surface plating. 

6.It is widely used in general machines,and suitable for food machine,pharmaceutical 

machine,tobacco machine etc.It will subsitute SF-1 series bushings in future because of environment protection. 



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Q:What are the parameters of maximum bearing capacity factor Cp of plain bearings?
Specific pressure, speed, viscosity of lubricating oilCp is a dimensionless parameter that describes the bearing capacity of a bearing. For a specific bearing, under certain load F, the journal will be balanced in a certain position of the bearing (a certain offset e, a certain deflection angle), that is, in a stable working state. When the load F changes, the journal will move to the new equilibrium position.
Q:What are their respective priorities? Thank youThe sliding bearing is different from the rolling bearing, many categories, so many companies are doing the rolling bearing while passing sliding bearings, such as FAG; some do metal materials to sliding bearings, such as Japan datong. I hope the predecessors to enlighten.
In fact, FAG does not produce plain bearings.FAG, INA, LUK is the three largest brand owned by schaeffler;ELGES plain bearings are an integral part of INA's products. (understood as IBM and association)ELGES is a professional manufacturer of joint bearing, cylindrical sliding sleeve, rod end bearings and sliding bearings manufacturers, located in Germany by Shi Hagen,
Q:Which foreign brands are good for self lubricating sliding bearings?
Brand NSK, SKF, IGUS, OILERs, Canada, THORDON, USA, DRIE, etc.;Should say each has advantages, brand big words, the product is relatively expensive, product series of all words, not all kinds of products are fine;Like NSK and SKF, they now have self lubrication, but this is not their flagship product;
Q:Generally speaking, the stiffness of the rolling bearings is more than the stiffness of the sliding bearings - the stiffness of the ball bearings is more than the stiffness of the roller bearings - -
Generally speaking, the stiffness of rolling bearings is lower than that of plain bearings, and the stiffness of ball bearings is lower than that of roller bearings! ~
Q:Maintenance method of plain bearing
Bearing repair, installation quality is not high, 1, improve installation quality, reduce bearing vibration2, to prevent partial load and overload3 、 adopt suitable Babbitt and new bearing structure4, strictly control the bearing temperature riseBecause the grease dirt nap of large particles into the bearing gap, and embedded in the bearing bushings, bearing and shaft neck (or thrust plate) contact, hard callus formation on the surface, it will seriously scratch the shaft, bearing oil picking attention clean, especially in maintenance, should pay attention to the metal chips or clean dirtWear and tear due to impurities in the lubricating oil, foreign matter and dirt.
Q:What is the clearance of plain bearings?
To leave a certain axial clearance, which refers to the axis of the movement of the gap, but also divided into thrust gap and expansion gap. The thrust clearance is the clearance left for the thrust bearing to allow for axial movement. The expansion clearance is the clearance left to the bearing in accordance with the radial load in order to ensure the free expansion of the shaft. The size of the gap is related to the accuracy of the machine in operation, the smaller the radial clearance, the higher the accuracy, but the gap narrowed to a certain extent, it can not guarantee liquid lubrication. When the clearance is too large, it will generate pulsation in the rotation, and can not form a stable oil film lubrication. Therefore, the radial gap value can not be arbitrarily specified, should comply with the requirements of the machine technical documents. The radial clearance of plain bearings is very important, too large and too small to be extremely harmful. The gap is too large, the lubricating oil film bearing is formed, can not guarantee the liquid lubrication, and can reduce the operation of the machine precision, even violent vibration and noise, would cause serious accidents; the gap is too small, it is also difficult to form a lubricating oil film, will have a high fever, serious accident will occur. The sliding bearing should be provided with an axial clearance to allow the axle to flex freely when the temperature changes. Generally speaking, in order to improve the running accuracy of the shaft, the axial clearance is smaller. But not too small, axial clearance is too small, high heat occurs in the operation may produce bite phenomenon, or even damage bearings, accidents.
Q:What is the transmission efficiency of plain bearings and rolling bearings?
The efficiency of the sliding bearing is 0.92~0.96; the efficiency of the rolling bearing is 0.98~0.99.Sliding bearings (sliding, bearing) bearings that work under sliding friction. Plain bearings work smoothly, reliably and without noise. Under the condition of liquid lubrication, the sliding surface is separated by the lubricant without direct contact, and the friction loss and surface wear can be greatly reduced.
Q:What's the difference between plain bearings and oilless bearings?
The sliding bearing has the following characteristics: 1, long service life, suitable for high speed; 2, can withstand the shock and vibration load; 3, high running precision, work balance, no noise; 4, simple structure, convenient assembly and disassembly; 5, large carrying capacity, can be used for heavy-duty; 6, non friction sliding friction bearing liquid. Loss of fluid friction; sliding bearing, rolling bearing friction loss and not much difference, but the design and manufacture of lubrication and maintenance requirements of high.
Q:What kind of lubrication is used for spindle bearings of important or precision machine tools?
2. universal grinder, internal grinder, grinding high speed grease for these two kinds of grinding roller bearing, the rolling bearing of high speed spindle, the spindle speed is 1000 ~ 20000r / min, according to the speed range, such as when the value is less than 1 * 106, choice of precision machine tool spindle grease (No. 3 high speed grinding grease) white grease or special grease. This kind of machine tool and bearing internal grinder similar rolling 3. universal thread grinder spindle, spindle rolling bearing structure for ball type, spindle speed range is different, such as spindle speed Y7520WDN universal thread grinder is 5745 ~ 18000r / rain, can choose 2 high speed spindle bearing grease, can also be No. 2 multipurpose grease. 4. rolling bearing gear grinding machine spindle gear grinder spindle speed, generally in the 1000 ~ 3000r / min, in the speed range, the rolling bearing can be lubricated by lubricating oil, also can be lubricated by grease, such as high speed spindle bearing grease No. 3 or No. 2 multi effect lithium base grease. Rolling bearings use N15 mechanical oil or 2 spindle oil lubrication, bearing noise, grinding head noise, grinding head temperature of 70~80 degrees, and the oil leakage is serious, bearing wear rate is high, affecting production. If the switch to general lithium grease, can eliminate the temperature rise, to avoid oil leakage, stable work, surface roughness from level 6 to level 7, and add the grease has been used to bearing scrap, can prolong the service life of 2~3 times of bearing. Improve the industry technology, can find some more and more school platform, such as Xin opportunity, or in the application market to try to search some metal processing related applications ~ hope to adopt.
Q:Material and allowable line speed of plain bearings?
Bushings in oil lubrication and oil-free lubrication, large load, and load hours allowed line speed is not the same.

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