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:Which sliding bearing materials are free of lubrication?: Office and Business Machines: copiers, fax machines, printers, mail processors, etc.;Hydraulic components and valves: gear pumps, piston pumps, vane pumps, ball valves, butterfly valves, cylinders, cylinders, and other hydraulic components;Household appliances: refrigerators, air conditioners, vacuum cleaners, sewing machines, washing machines, microwave ovens and fitness equipment, etc.;And other logistics machinery, packaging machinery, textile machinery, port machinery, mining machinery and forest machinery, and so on.

Q:What are the assembly points of plain bearings?: What are the assembly points of plain bearings?Sliding bearing assembly and bearing must be on the same plane, the same line, the same axis, the bearing must be parallel mutually in the same plane parallel to each other, and the corrected assembly gap, the parallelism and beat meets the design requirements, to ensure the smooth sliding equipment.

Q:What is a sliding bearing alloy?: 1, sufficient strength and hardness; 2, high wear resistance and small friction coefficient;

Q:What is the friction between the shaft and sleeve of the sliding bearing?: 4, dry frictionTwo friction between surfaces without any substance is called dry friction, and in practice there is no ideal dry friction. Because there is always a variety of oxide film on any metal surface, it is difficult to have pure metal contact (unless it is possible in a clean laboratory). Because of the dry friction state, a great deal of friction loss and serious wear will occur, so the dry friction state is not allowed in the sliding bearing, otherwise it will lead to a great temperature rise and burn the bush.Full liquid friction is the ideal condition for sliding bearings. For those important and high speed rotating machines, it is necessary to ensure that the bearings work under full liquid friction, which is often referred to as a liquid friction sliding bearing. The boundary friction often coexists with the half fluid friction state and the semi dry friction state, which is generally called non liquid friction state. Solid lubrication friction is the effective way to replace liquid friction at high temperature and under water, overloading and other special conditions; for those in the low speed and the impact of work under the conditions of the less important machine can press liquid friction bearing design, called non liquid friction sliding bearing.

Q:What are the automotive engine journal bearings?: In the assembly, bearing the circumferential interference into radial interference, the radial pressure generated on the bearing hole of the bearing bush tightly in the bearing hole, to ensure its good bearing and heat capacity, improve the reliability of the bearing and prolong its service life. 2. crankshaft thrust bearings, when the car is running, because of the clutch pedal, the crankshaft is applied to the axial thrust, so that the crankshaft axial movement. Excessive axial movement will affect the normal operation and destruction of the piston connecting rod set, correct timing of the gas distribution and injection timing of the diesel engine. In order to ensure the correct axial alignment of the crankshaft, a thrust bearing is required and only a thrust bearing is provided at one point to ensure that the crankshaft is free to elongate when heated. The crankshaft thrust bearing has 3 forms: flanged bush, half ring thrust plate and thrust bearing ring. The flanging bearing bush is to make the flange on both sides of the Bush as the thrust surface and cast antifriction alloy on the thrust face. There is a clearance of 0.06 ~ 0.25mm between the thrust surface of the Bush and the thrust surface of the crankshaft, thus limiting the axial thrust of the crankshaft. The semicircle ring thrust plate is usually four pieces, each of the upper and lower two pieces are respectively installed in the shallow groove of the body and the main bearing cover, and are positioned with a positioning tongue or a positioning pin to prevent the rotation. When assembling, the thrust surface of the antifriction alloy layer shall be directed toward the thrust surface of the crankshaft, and shall not be reversed. The thrust bearing ring is two pieces of thrust rings which are respectively arranged on both sides of the first main bearing cap.

Q:The service life of a sliding bearing can theoretically be infinite, but this is not necessarily the case because the conditions of use can not be ideal. I want to know how long the actual life of the sliding bearings is The longest sliding bearings that I have come into contact with are the bearings (dynamic lubrication) of two Japanese roller mill spindles, which have been used here for about 30 years without any repairs.: The service life of a sliding bearing can theoretically be infinite, but this is not necessarily the case because the conditions of use can not be ideal. I want to know how long the actual life of the sliding bearings is The longest sliding bearings that I have come into contact with are the bearings (dynamic lubrication) of two Japanese roller mill spindles, which have been used here for about 30 years without any repairs.

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:Drive shaft maximum speed 5000rpm, oil lubrication, load is not big. Our other models of synchronous belt drive is matched with ball bearings, try sliding bearings (we call sleeve), showed the problem is increasing, the temperature rise increases torque and wear increase, this feeling is not reasonable collocation problems, because the synchronous belt requires relatively large feeding force piece, this will bring the radial the pressure between the shaft and the sleeve, resulting in large friction. Only their own analysis, the lack of theoretical basis.: Provide specific size, you can add me to explore

Q:What are the advantages and disadvantages of plain bearings compared with those of rolling bearings?: Compared with rolling bearings, sliding bearings have advantages:1) the sliding bearing is compact, and the bearing capacity of the plain bearing is much larger at the same size.2) plain bearings allow for high accuracy, low vibration and noise.3) the sliding shaft bears little influence on metal foreign body, and it is not easy to produce early damage.

Q:Sliding bearings, according to their friction state, why bearings and what?: 2. boundary frictionThe boundary of oil film thickness is less than 1 microns to two metal surface is completely separated from each other, when the movement of two metal surfaces, metal surface asperities will still considerable rubbing cut, this friction is called boundary friction. The boundary friction friction laws, basically the same with the dry friction, the friction coefficient decreases, f = 0.1 ~ 0.3. Although the boundary friction can not completely avoid the metal surface wear, but it can greatly reduce wear and tear.3. fluid frictionWhen the two friction surfaces have sufficient lubricating oil, the oil film thickness is large enough to form a two surface asperity completely separated, the friction between the molecules of the fluid inside only when relative motion is called fluid friction, the oil film is formed under certain high pressure oil film small load, prevent the direct contact between two friction surfaces, so the minimal friction coefficient (F = 0.001 ~ 0.01), significantly reduces friction and wear.

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