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Bearing quality standards

1. Bearing quality testing vibration standards

 

1. The vibration velocity standard (known as V standard)

 

Because the original vibration acceleration the standard is not abolish, so the standard based on mechanical industry standard of the first-class appear, is the European standard reference with the actual situation in our country and the need to make, to detect bearing vibration velocity to differentiate bearing quality level (equivalent to the national standard). Divided into V, V1 and V2 and V3, V4 five quality grade. All kinds of ball bearings from low to high quality level for V, V1 and V2 and V3, V4; Roller bearing (cylindrical, tapered) from low to high quality level for V, V1 and V2 and V3 four quality grade. It is based on detection bearing different shows (low frequency, intermediate frequency, the high frequency) vibration velocity to reflect the bearing b quality. The bearing can be roughly analysis whether there are geometry size problem (such as rims elliptic), groove/the quality problem of the roller, maintains a quality problem, than the vibration acceleration to investigate bearing quality to have significant progress. At present domestic export European bearing, the military and aerospace industry in China in accordance with the standards are bearing quality tests, and European import bearings and quality detection distinguish fake import bearing provide a feasible method. KOYO bearing detection, import bearings, SKF bearing, NSK bearings, fag bearing, IKO needle series bearing

 

 

 

2. The vibration acceleration national standards (known as Z standard)

 

This standard is earlier to measure bearing rotation and vibration acceleration data to determine bearing quality rating, divided into Z1 and Z2 Z3, from low to high three quality grade. At present domestic bearing manufacturer still in use to measure bearing vibration acceleration is superior, just simply reflects the fatigue life of bearing.

 
At present there are two bearing quality inspection standard parallel situation, and "Z standard" quality rank high bearing, with "V standard" test may not be good quality performance, without any corresponding relation between the two. This in the quality of detection of bearing is to pay special attention to. KOYO bearing detection, import bearings, SKF bearing, NSK bearings, fag bearing, IKO needle series bearing



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