1;Measuring bearing size (renovation bearing dimensions less than new bearing)

2;Watch the bearing surface smooth precision whether (renovation bearing rough)

3;Turn bearing is even (renovation bearing drive not divide evenly and size ball)

For false and inferior bearing identification was more difficult:

1, because of the limits of the raw materials, and the hardness of bearing can not reach the national requirements. In use can appear be out of shape and so on, thus affecting the working life, damage to other parts of the machine. Especially some hot bearing and high-speed bearing, bearing directly affects its hardness using life and use security.

2, because of small manufacturer and underground factory ZhanHuo technical limitations, and shoddy bearing GangWa ZhanHuo heating temperatures don't even, so that affect the precision of the bearing, appear deformation, etc.

Three, its huge technical limit directly affect the precision of the bearings, made this problem be unable to overcome shortcomings, and the gap precision machine parts of the direct damage not only, still make bearing a more complicated things loading and unloading, appear even served no, not the available discharge, direct damage machine, delay working hours.

4, a few small manufacturers and illegal processing plant in order to reduce cost, use inferior steel, carbon steel and other raw materials are, and, at the same time in the process of production to reduce process, these products in use process easier to appear problem, even directly to make the machine equipment scrap.

 
Buyers in addition to enhance their sense of the legal consciousness, we learn to identify, choose quality goods import f bearing, so as to avoid equipment due to repair damage.



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