For the customization of bearings, the bearing customization manufacturers have a production quality standard for customized bearings. What is this quality standard? Customized manufacturers with 35 years of customization experience reveal the secrets for everyone, a good quality standard, so that everyone can use it with peace of mind. 1. The national standard for vibration acceleration (commonly known as the Z standard) This standard was formulated relatively early to measure the vibration acceleration value when the bearing rotates to determine the quality grade of the bearing, which is divided into three quality grades from low to high: Z1, Z2, and Z3. Manufacturers still use the vibration acceleration value to measure the quality of the bearing, which simply reflects the fatigue life of the bearing. 2. Vibration speed standard (commonly known as V standard) Since the original vibration acceleration standard has not been abolished, this standard appeared as a standard issued by the Ministry of Machinery Industry. It was formulated with reference to European standards and combined with the actual situation and needs of our country to detect the bearing vibration speed. To divide the quality grade of the bearing. It is divided into five quality levels: V, V1, V2, V3 and V4. The quality grades of various ball bearings are V, V1, V2, V3, V4 from low to high; the quality grades of roller bearings (cylindrical, conical) are V, V1, V2, V3 four quality grades from low to high. Co., Ltd. was established in 1985, focusing on the production of precision ball bearings, with 35 years of experience in bearing custom manufacturers. Production of various types and specifications of angular contact ball bearings, deep groove ball bearings, lathe spindle bearings, tapered bearings, single row angular contact ball bearings, double row angular contact ball bearings, paired bearings, Automobile bearings and non-standard bearings of various technical requirements, etc.