Double Row Bearing Deep Groove Ball Bearing

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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:sliding bearing
There is a fundamental difference between plain bearings and rolling bearings.The rolling bearings bear the weight by the ball bearings, and the contact between the friction pairs is unavoidable, and the wear is unavoidable. Just imagine how many tens of tons of rotating shaft, 3000 rpm per minute, if rolling bearings can hold for how long?The static and dynamic parts of the sliding bearing are not in direct contact. When rotating at high speed, the rotating shaft is raised by a high pressure oil film to form a suspension state. So, as long as properly used, sliding bearings can carry dozens of tons of rotating shaft, continuous operation thousands of tens of thousands of hours.
Q:What's the difference between rolling and plain bearings? What is Bush? What do you mean by scraping the Bush? How to operate?
If due to bad lubrication, there is direct friction between bearing and shaft friction will produce high temperature, while the bearing is due to the special high temperature resistant alloy material, but high temperature direct friction on the burn is still. The Bush may also be burnt due to excessive load, high temperature, impurities or abnormal viscosity of lubricating oil. The plain bearing is damaged after burning the tile.The so-called scraping bearing, is fine after the car assembled by hand and shaft tile Research (shaft should be coated with toner), with a triangular blade attached on the tiles in pink, with research with scratch, until the tiles add color area of more than 85% complete full tile surface, scraping.There is a micro knife tile tile storing lubricating oil tank.
Q:What are the most afraid of sliding bearings?
Sliding bearings are surface contact, so between the contact surface to maintain a certain oil film, so the design should pay attention to the following problems:1, it is necessary to smooth the oil film into the friction surface.2, oil should be from the non load area into the bearing.3, do not make the whole ring oil tank in the middle of the bearing.4, such as oil tile, joint opening oil groove.5. Make the oil ring fully and reliably supplied to the oil.6, the filling hole not blocked.7, do not form an oil free flow zone.8, to prevent cutting off the sharp edges and edges of the film.
Q:How many kinds of bearings are there in sliding bearings? What's the function of each?
There are two kinds of clearance, one is the clearance between bearing and bearing bush, the other two is radial clearance of bearing. The first kind of clearance will cause the bearing or bush to be damaged, the lubricant pressure will be reduced, the gap will be too small, the bearing or bearing load will increase sharply, or even burn (tile).The second kind of clearance is too big, the bearing will move back and forth in the radial direction, the whole machine is not stable, the gap is too small, so that the load of the machine increases.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. The oil film also has a certain vibration absorption capacity. But the starting friction resistance is larger.
Q:Hello, about the bearing problem. Sliding bearings are made of powder metallurgy. What kind of grease does it use?
Powder metallurgy bearing is lubricated bearings in the factory will be through the vacuum method of negative pressure adsorption added lubricating oil, in the late stage of the process slowly release and consumption, good quality of powder metallurgy bearing life can reach more than ten years.This type of bearing is recommended to not add lubricating oil or grease, add after will have to change the bearings of the environment, such as dust adhesion, friction coefficient change, oil smoothly, when oil was crushed, and the lubrication performance of powder metallurgy bearing itself and do not come out to play, will become very astringent a card, caused by poor lubrication, which often needs to be added, resulting in unnecessary consumption and fee of manpower. Of course, there is a powder metallurgy sliding bearing is not oily, there is grease, add glib, this is often need to add fat.
Q:Are magnetic drive pumps static and sliding bearings a thing?
4. thrust bearing (understand) (1) thrust bearing fixed and tilting. (2) the thrust surface of thrust bearing can use the end surface of the shaft, or can make a convex shoulder or thrust the disc in the middle of the shaft. (two) the types and characteristics of rolling bearings; 1. classification of rolling bearings according to the shape of the rolling body is divided into: ball bearings, roller bearings. 2. characteristics of rolling bearings (1) advantages: compared with plain bearings, rolling bearings have the advantages of small friction resistance, quick starting, high efficiency, simple lubrication and easy replacement. (2) disadvantages: poor shock resistance, noise at high speed and long service life, as opposed to liquid lubricated sliding bearings.This answer is recommended by the questioner
Q:How to distinguish sliding bearings and rolling bearings?
Rolling bearings are relatively moving parts with rolling bodies for rolling bearings.
Q:What are the conditions for forming sliding bearings and dynamic oil film lubrication?
Well sealed, oil pressure normal, extreme pressure of oil meets demand.
Q:What is the working principle of turbine bearings in power plants?
The working principle of steam turbine sliding bearings:With the turbine turn the rotor speed up, because the lubricating oil viscosity in shaft driven by more and more oil into the shaft and bearing the formation of oil contracts, oil pressure rises gradually, the rotor will slowly lift to the speed of the shaft neck on the formation of oil film stability.Attached:The role of steam turbine support bearings:Bear the weight of the rotor and the centrifugal force of the unbalanced mass of the rotor, and determine the radial position of the rotor to ensure that the rotor center is identical to the center of the cylinder to maintain the correct radial clearance between the rotor and the rest.The role of thrust bearings in steam turbines:The axial thrust of the rotor is not balanced, and the axial position of the rotor is determined to ensure the correct axial clearance between the moving and static parts.
Q:What is the performance of plain bearings?
Heavy load and low speed are suitable for occasions where the impact load is increased, the installation is difficult, and the lubrication conditions are not ideal

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