SKF bearing 6308 - 2 z installation problem

SKF bearing 6308 - 2018-2 z installation problems 11 - The stand or fall of 30 bearing installed or not, will influence the accuracy, bearing life and performance, therefore, please correct the bearing installation and maintenance. Recently encountered such a user, for SKF 6308 - brand 2 z bearing, installed on the fan of 2900 r/min, use more than a day due to raise the temperature of bearing fan can not run normally, after a detailed communication with users, found that users forcibly remove the side cover gasket before bearing installation, lubrication, joined their company again to lid is installed into the bearing, bearing by hammering on the fan. Results it is understood that in the process of using the problem also is not an accidental phenomenon. This paper to introduce in detail how to correct installation of SKF bearing sealing and hopes to be helpful for your work. 1. Now let's look at SKF 6308 - 2 z is long what look like? The diagram below: inside and outside the packaging and product in figure 2. Bearing model 6308 - Figure 2 z technical parameters: the basic size calculation of the shoulder size chart data: 3. Product description: SKF company produced 6308 - 2 z is two sides with a dust cover deep groove ball bearings, belongs to the sealed bearing. The performance of the bearing can completely meet the requirements of the conditions of use. What is a sealed bearing? Sealed bearing is either one or both at the same time can provide bearing with dust cover or seal. With dust cover or sealing ring on both sides of the bearing has good add grease, is permanently lubricated and dispensing with maintenance. SKF bearing structure below. Bearing with dust cover, suffix for Z or Z 2. Dust cover is made of steel sheet stamping, the inner diameter of the dust cover and the cylindrical outer diameter of the bearing inner ring surface is not contact. Two sides with a dust cover can prevent the bearing inner grease will not be thrown in great quantities, to prevent the dust from the outside, foreign bodies, such as entering the bearing inside. With low friction sealing ring of bearing, the suffix for RSL, 2 RSL or RZ, 2 RZ, according to the different bearing series and size, have different structure design. Seal ring generally by the oil resistance and abrasion resistance of NBR ( NBR） With steel skeleton. Seal of the allowed working temperature in - Between 40 ℃ ~ + 100 ℃, and instantly up to + 120 ℃. The inner diameter of the sealing ring and the inner ring shoulders of cylindrical surface or inner ring groove contour is formed between a very narrow gap, is not in contact. So the bearings with low friction sealing ring can be with dust cover ( The suffix Z) The bearing under the condition of the same run, but its sealing performance is better. Take contact sealing ring of the bearing, suffix, code-named RSH, RSH or RS1, 2 RS1. Seal of the lips and the bearing inner ring shoulders or seal groove end department will have a small amount of contact, sealed performance is more superior. 4. Installation method: in selecting the two sides with a dust cover or seal products, should be how to properly installed? Because this kind of bearing has been internally have been added in line with the bearing performance of a suitable amount of grease, and products in the factory has made the corresponding rhyme fat before, so can be installed directly in the relevant parts of the equipment. Double sealed bearings are one-time lubrication products, without washing when installation, add lubricating oil can't open the lid, especially the dust cover can not be forced to open more fatliquoring, this kind of seal products should be installed directly. Installed directly, direct installation and direct, important things three times. If it is a larger section of seal bearing need heating installation, also can adopt the method of induction heating heat. The above client - 6308 2 z bearing used in the process of installing lever cover add grease is very wrong, different type of grease will due to incompatible, added together, consistency might happen very big change, grease are more likely to be huge loss because of this, the final result in bearing temperature and damage. 6308 - 2 z bearing belongs to the small and medium-sized bearings, bearing inner hole and shaft are normally interference quantity is small, can adopt the way of the cold pack installation. The appropriate size of the sleeve, ring face, with a press or hammer will force evenly on the face, circle, the complete set of bearing pressure into the shaft. Bearing before installation, of course, all must be ready for work, such as the installation of clean environment ( Including site, shaft, bearing hole cleaning) And all kinds of installation tools, etc. After the two sides with sealed bearing installed, should be starting under low speed, check the moving parts is touching one another and fixed parts, such as temperature and vibration is in line with the requirements. There is no problem, equipment can be transferred to the normal service speed operation. Deep groove ball bearing of two sides with seal in use, again without lubrication. In use process, observe the bearing temperature rise, vibration, etc. , as long as within the normal requirements, you can use for a long time. 2018 - hundred union engineer 5 - 28 ( Statement: the sole contributor, shall not be reproduced without permission. 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