advanced search self-aligning ball bearing 2208

advanced search self-aligning ball bearing 2208

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 10 set

Supply Capability:: 100000 set/month

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Specifications

advanced search self-aligning ball bearing 2208
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Advanced search self-aligning ball bearing 2208

Double row self-aligning ball bearings have a sphere raceway in the outer ring and a double raceway in the inner ring. This feature give the bearings their self-aligning property, permitting angular misalignment of the shaft relative to the housing. They are therefore particularly suitable for applications where misalignment can arise from errors in mounting or from shaft deflection.

Double row self-aligning ball bearings are mainly used to carry radial loads and light axial loads, but cann't carry pure axial loads

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.

advanced search self-aligning ball bearing 2208

Q:What is the cause of oil leakage in high pressure motor bearings (plain bearings)?: The inlet pipe and the oil return pipe joint, oil cup, thermometer socket and valve sealed badThe ventilation system to form a vacuum in the bearing end, lubricating oil from the bearing inside out

Q:What will cause the friction coefficient to be inaccurate in a hydrodynamic sliding bearing?: The gap between the shaft and the hole, the shaft speed of these two factors is more critical, gap control is not good, there is no way to form a good oil film, that is, can not form a complete liquid friction

Q:What are the commonly used sliding bearing bushing materials: (3) oilless bearings. It is a kind of porous material which is made of bronze and cast iron powder, pressed by heavy graphite, and sintered by high temperature. It is often used in low or medium speed, light load and inconvenient lubrication.(4) nylon. Nylon, nylon 6 and nylon 1010 are commonly used. The nylon bearing has the advantages of good running and good quality, soft fragments after wear, no damage to the shaft neck, good corrosion resistance, etc. the heat conductivity is poor, and the water can swell when the water is absorbed.

Q:Why are lubricated bearings lubricated by sliding bearings? Why grease lubrication?: Sliding bearings directly contact the contact surface, high speed, oil lubrication can improve the good lubrication. If grease lubrication, slightly bad lubrication, immediate high temperature damage, the consequences are not envisaged.Rolling bearings generally due to the conditions of economic problems, the use of grease lubrication, but also enterprises choose oil lubrication.

Q:250 kilowatts of motors, replacement of new bearings, after driving bearing fever, the bearings inside the grease all thrown out What's the matter? Expert answer!: I think there may be three reasons1 may make you grease too much2 may be higher bearing temperature, more than the upper limit of the grease, the use of temperature caused oxidation deterioration of the oil, it is recommended to replace high temperature grease...3, you may use the brand of grease is not correct, change cone penetration of grease is betterIn addition, the consistency of grease and temperature are also related, in general, the higher the temperature, the thicker the grease

Q:One hundred and twentyAttention is the reason and purpose, the postgraduate entrance examination urgent need, thank you answer, after the exam will be re points, thank you!: If the average temperature of the oil exceeds the value set when calculating the carrying capacity, then the bearing capacity will decline or even fail, so the thermal balance calculation of the sliding bearing must be carried out.

Q:Explanation of sliding bearing code: 6309-2z/p5: (2) prefix codeThe bearing prefix is used to represent the bearing parts and is represented by letters. For example, separable rings for separable bearings are represented by L; the K represents the rolling element of the bearing and the cage assembly.(3) post codeThe rear code of the bearing is used to indicate the structure, tolerances and special requirements of materials, such as letters and numbers. There are many contents of the post code name. Here are some commonly used code names.1) the internal structural code is the different internal structure of the same type of bearing, followed by the basic code. Such as: contact angle of 15 degrees, 25 degrees and 40 degrees of angular contact ball bearings, respectively, with C, AC and B that {HotTag} internal structure of the difference.2) bearing tolerance grade is divided into 2 levels, 4, 5, 6, 6X and 0, a total of 6 levels, followed by advanced to low-level, its code names are /PZ, /P4, /PS, /P6, /P6X and /PO. Tolerance class, 6X class applies only to tapered roller bearings; 0 is an ordinary class, in the wheel bearing code is not marked..3) bearing radial clearance series commonly divided into 1 groups, 2 group, 0 group, 3 group, 4 group and 5 group, a total of 6 groups, sequentially larger radial clearance. O group clearance is a common clearance group, in the bearing code is not marked, and the rest of the clearance group in the bearing code respectively with /CI, /CZ, /C3, /C4, /CS said.

Q:What are the automotive engine journal bearings?: Also called white alloy Babbitt, tin based white metal used to reduce friction, but low fatigue strength, heat resistance, temperature exceeding 100 DEG C hardness and strength decreased significantly, the gasoline engine used to load. The outstanding advantages of copper lead alloy are its large carrying capacity, high fatigue resistance and good heat resistance. But the running in performance and corrosion resistance are poor. In order to improve its running in and corrosion resistance, a layer of soft metal is usually electroplated on the surface of copper lead alloy into three layers of structural bearings, which are mostly used in high strength diesel engines. Al based alloys include aluminum, antimony magnesium alloy, low tin aluminum alloy and high tin aluminum alloy. High tin aluminum alloy bearings containing more than 20% of tin are widely used in gasoline engines and diesel engines because of their better bearing capacity, fatigue resistance and antifriction performance. The soft coating refers to electroplated a tin or tin lead alloy on the antifriction alloy layer. Its main function is to improve the running in performance of the Bush and to be used as the protective layer of the antifriction alloy layer. When the Bush is in the free state, the distance between the outer ends of the two joint surfaces is larger than the diameter of the bearing bore, and the difference is called the opening of the bearing bush.

Q:Who says that the sliding bearing motor is better than the ball bearing motor?: The rolling ball bearing is the ball, roller bearings should be cylindrical roller bearing, rolling body inside the cylinder, a bearing point contact, less friction, high working speed limit, but the bearing capacity is small, suitable for high speed and light load. The latter is in line contact form, which has large friction force, but also has great carrying capacity, and is suitable for occasions with low speed and heavy load,

Q:What are the main applications of plain bearings?: 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. The shaft supported by the bearing is called the journal, and the part that matches the journal is called the bush.

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