Correct inspection quality of ball roller bearing, do you use?

The bearing quality testing situation of two standard parallel and quality is high level of the Z standard of the bearing, with the "V" when testing may not have a good quality performance, there is no corresponding relationship between both.In the bearing is to pay special attention to the quality inspection.The following is the matters needing attention for testing quality of ball roller bearing:
(1) bearing commodity inspection according to which standard;
(2) what are the project bearing the commodity inspection, why do you want to test these projects;
(3) bearing goods before the quality inspection, you need to do what preparation work, why want to do these preparations;
(4) bearing all inspection items of the goods is under what conditions, with what method, what kind of instrument for inspection, inspection results must be within the scope of what kind of tolerance in order to be qualified;
(5) bearing goods volume is very big, sometimes can't be one hundred percent inspection, it should adopt what kind of sampling plan, sampling quantity for inspection, can more fully and reliable enough to represent the quality of all goods Pressed Ball Roller Bearing Wheel, and the results of the inspection according to any standard to measure, to determine this batch of goods is qualified batch shall be accepted or unqualified batch shall be rejected.Bearing the acceptance inspection is usually divided into three categories, namely: routine check - bearing routine general check when the arrival of the goods.Regular inspection - the bearing assembly related dimension precision, rotating accuracy, bearing clearance and the residual magnetic intensity of bearing inspection project.Special inspection - on the vibration of the bearing quality and noise quality inspection and other special requirements for bearings.

Bearing vibration quality inspection standard
1. The vibration acceleration of China's standard (commonly known as the Z) establishment of the standard early, to measure the vibration of the bearing rotates acceleration value, to determine the quality level of bearing, divided into Z1, Z2, Z3 from low to high quality grade three.China bearing manufacturers are still in use, bearing in terms of vibration acceleration value, simply reflects the fatigue life of bearing.

2. The vibration velocity standard (commonly known as V standard) due to the vibration acceleration standard has not been abolished, so the standard is the ministerial standard of mechanical industry, is a reference of European standard combined with China's actual situation and the need to develop, to detect bearing vibration velocity to divide the bearing level of quality (equivalent to the national standard).: V, V1, V2, V3 and V4 five levels of quality.All kinds of FZH Brass Cage Ball Retainer Bush quality level from low to high V, V1, V2, V3 and V4;Roller bearings, cylindrical, cone) from low to high quality grade V, V1, V2, V3 four quality grades.It was based on the detection of bearing different frequency (low frequency, intermediate frequency and high frequency vibration velocity to reflect the quality of the bearing.Whether the analysis can be roughly three Thai SUNTHAI bearing geometry problems (such as rims ellipse), the quality problem of the raceway/roller, the quality problem of the cage, than to investigate bearing vibration acceleration has improved significantly in quality.Bearing at present China's exports Europe, the Chinese military and aerospace industry are conducted in accordance with the standard bearing quality testing, testing at the same time the European import bearing quality and distinguish fake imported bearing provides a feasible method.The bearing quality testing situation of two standard parallel and quality is high level of the Z standard of the bearing, with the "V" when testing may not have a good quality performance, there is no corresponding relationship between both.In the jin tai SF, bearing is to pay special attention to the quality inspection.