Vibration acceleration national standard (commonly known as the Z scale)

The earlier standards to measure the rotation of the bearing vibration acceleration values ??to determine the bearing quality grade, divided into Z1, Z2, Z3 from low to high three quality grades. Domestic bearing manufacturers are still in use, in order to measure the bearing vibration acceleration values ??the merits, just simply reflect the bearing fatigue life.
2. Vibration velocity standard (commonly known as the V mark)
Since the original vibration acceleration standard has not been abolished, so that the standard is based on mechanical industry ministerial standards emerge, is the reference to European standards combined with China's actual situation and the need to develop in order to detect taper roller bearing vibration velocity divided by the bearing quality level (equivalent to the national standard). Into V, V1, V2, V3, V4 five quality levels. Various ball bearing quality level from low to high as V, V1, V2, V3, V4; roller bearings (cylindrical, conical) quality level from low to high as V, V1, V2, V3 four quality levels.
It is based on detecting bearing different frequency bands (low, medium, high) to reflect the speed of the vibration b bearing quality. Bearings can be roughly analyzed whether there geometry problems (such as rims oval), roller / rolling quality problems, quality problems cage, to examine the vibration acceleration than to have a significant bearing quality improvement. Domestic exports to Europe bearing, our military and aerospace industries are in accordance with the standards for bearing quality testing, and testing the quality and resolution of the European imports of counterfeit bearings imported bearings provide a viable means. KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings
Bearing quality detect the presence of two standard parallel situation, while "Z labeled" high quality grade bearings to "V standard" detection may not have a good quality performance, there is no corresponding relationship between the two. This bearing quality testing is to pay special attention. KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings