Double Row Bearing Deep Groove Ball Bearing
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- 500 pc
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- 200000 pc/month
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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.
Material
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
Technical
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
Application
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.
- Q: What copper is used to produce plain bearings for machine tools?
- according to the use conditions according to a certain proportion in the work surface processing hole and fill in the solid lubricant, copper alloy high strength provides high capacity and can form a solid lubricant friction low side.
- 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: What are the structural types of radial and thrust dynamic journal bearings?
- The vertical axis of the radial sliding bearing is the symmetrical surface of the bearing, that is, the middle of the ball or cylindrical rollerThe thrust roller bearings are asymmetric on both sides of the vertical axis, that is, the roller in the middle of the cone is the force of the axial thrust
- 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 are the factors associated with the oil film pressure of dynamic sliding bearings?
- 1) a convergent wedge gap must be formed between the two surfaces that are relatively sliding
- Q: Sliding bearing, bearing bushing, what is the relationship? There must be a sliding bearing bushing and bearing in?
- The bushing is mounted on the shaft, with the shaft to rotate together. The Bush is mounted on the seat and does not rotate.
- Q: Are plain bearings grease lubricated?
- Whether it is oil grease, need to first select the appropriate viscosity or consistency, viscosity is too large internal friction resistance increases, dynamic wear is also increased, so the friction heat is also increased, and accelerating the oil deterioration, above a certain temperature, will accelerate the fatigue wear. Once the viscosity is too small, the lubricant film is thin and the strength is not enough, only friction and wear, and even produce non fluid lubrication or dry friction, thereby damaging the machine.
- Q: Is it good for rolling bearings of single cylinder diesel engines or for sliding bearings?
- But if uses the rolling bearing, usually is bears the load quite low place, moreover the lubrication way can only use the splash lubrication or the grease lubrication, this is not suitable in the diesel engine.
- 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.
- ELGES brings together more than 60 years of brand production experience, and embodies the technical expertise of Schaeffler Group Company's global production.ELGES has two kinds of high performance sliding coating options,
- Q: Tilting pad radial sliding bearing which features
- Composition of tilting pad usually consists of 3 ~ 5 arc Babbitt pad or more blocks can freely tilt on the fulcrum of the pad. When working with speed, load and bearing temperature of free swing, forming a plurality of wedge in diameter around. Each piece of tile is supported on the bearing sleeve through the back the ball pin and pad, pad can be around the spherical support pin swing; surface upper pad, the back bearing are respectively arranged in the spring, from the end of the pad pad compression, artificial establishment of oil wedge.
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Double Row Bearing Deep Groove Ball Bearing
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 500 pc
- Supply Capability:
- 200000 pc/month
OKorder Service Pledge
OKorder Financial Service
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