Ball bearing

Product Description

1. MATERIAL The rings and rollers of the bearings are made of refining bearing steel GCr*5 (AISI ****0), the retainer is punched from brass strip (H*2) or top quality cold-rolled steel strip (SPCC BQB**2) and reinforced plastics are available if necessary. The shield is made by phosphatizing steel skeleton and butyronitrile rubber with hot pressed. The rings and rollers of stainless steel bearings are made by refining stainless steel 9Cr*8 (AISI**0C). 2. TOLERANCE The bearing tolerance is classified as Class2, 4, 5, 6and 0 accordance with the Chinese national standard GB/xxxxx table as below makes a comparison between this classification of tolerance with Chinese national standard GB*****4 as well as ISO standard. 3. RADIAL PLAY The radial play of bearings is specified as five groups as follows in accordance with Chinese national standard. 4. SHIELDS, SEALS AND LUBRICANT The bearings are divided into various types such as bearings, single shield or double shield (z, zz) and single seal or double seals (RS, 2RS).They are filled with proper quantity antirust lubricant or grease before shipment. All these bearings can be used after unpacking without cleaning. They are suitable for light to medium load, low to moderate speed are the working temperature from**0~**0 centigrade degrees equipment. In case of any particular working condition is involved, customer must mark lubricant quantity to be filled and lubricant. 5. VIBRATION AND NOISE The vibration and noise of bearings are classified as Z1, Z2 and Z3. It is measured by the instrument of xxxxx special requirement. It is measured by BVT*1 and classified as V1, V2 and V3.