Bearing damage and a detailed description of the solution

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Improper 1), bearing in advance the causes of damage one of the lubrication
Although you can install the "free" plastic seal bearing, but still in the early failure of bearings percentile 36 is caused due to incorrect grea se technology.
Any improper lubrication of the bearings, are inevitable failure in advance, due to the bearing hub in the plastic is not easy assembly and disassembly of parts, the innate use of incorrect grease without the use of the late replacement grease or grease occur carbonation deterioration of pollution does not promptly replaced, that your hub is very difficult to have a long enough life and good lubrication.
Bicycle use with forest we encounter the small size of most of them are deep groove ball bearings, such as 609,6000,6001,6200 for small-scale industrial motor stator and rotor bearing such a small bearing at the time of purchase is usually pre-installed is a low viscosity, high lubricity broad-spectrum grease. ball bearing screw
The past, we also have a large number of errors to buy and the price is quite expensive to use this type of grease, such as SKF purchase LGMT-2 Lithium grease, which is a low-torque, low-friction motor oil , which most trumpet skf bearing, when the price is very expensive, 200 g packaging prices as high as 60, but only 110 so that the viscosity of the oil-bearing for high load, extreme pressure, reciprocating motion the ability is poor, according to the use of the bicycle axis, which should be a low-speed, high extreme pressure because a lot of pressure is concentrated in only a small bearing will produce a greater pressure, and the impact of jumping, so we later chose to SKF s LGEP-2 synthesis of lithium-based grease, and this price is also expensive (155 yuan), but its viscosity up to 200, high load, high water, high anti-rust, high vibration, while the low torque not as good as LGMT-2 away from the friction index, but perfectly suited to bike around the central axis and the car first bowl of the group (today we have some old models of hubs, such as rm40 repair the use LGEP-2 lubrication).
2), bearing in advance the causes of damage of the two improper assembly
Damage to another up to 16 percentage reason is the improper assembly of the error or loading of violence, makes those bearing smooth pan bowl surface percussion flawed when loaded. single ball bearing
To Peilin Ka tight axis, prevent bushings friction phenomena generated (this phenomenon will be in the high-speed rotating machinery and instantly generate high temperatures caused by the lubricants dry out and even lead to the heat and get stuck, resulting in shutdown), so the bearing inner pan and the outer bowl (also known as industrial bearing box) using a phenomenon of "interference", the popular pan large axis than the inner, or outer bowl than loading large objects, such Guo Ying needs a lot of power can be loaded income, while percussion require great strength, which can cause bearing damage in the process of knocking, so the industrial Bearings are usually heated, hydraulic jacking into such a load on the bearing.
Bicycle use is plastic sealed deep groove ball bearings, such bearings are most afraid of tap (needle roller bearings and bearing slightly stronger resistance to percussion), and also not use the heating load, but due to bicycle bearing the interference is very small, even hand put the Ru Peilin bearing hubs such as Qing Hao, so use plastic hammer typing is a relatively safe, but the top into the scapegoat thing is a very flat surface, use of static press, such as a vise to compress is the best way. crossed roller bearing