The classification of the non-standard bearing factory and clearance analysis

Classification of non-standard bearing factory and clearance analysis source: bearing | last updated: - 2020 07 - 01 the classification of the non-standard bearing factory and clearance analysis non-standard bearings can be divided into: ( 1) Miniature bearing - - - - Nominal diameter of 26 mm below the bearing; （ 2) Small bearings, 28 - nominal diameter 55mm； （ 3) Small and medium-sized bearings - - - - Range of 60 - nominal diameter 115 mm bearing; （ 4) Medium and large bearing - - - - Nominal diameter range is 120 - The 190 mm bearing ( 5) Large bearing, nominal diameter range is 200 - 430毫米; （ 6) Oversize bearings - - - - Range of nominal diameter is 440 mm or larger bearings. Non-standard bearings can be used for transmission, instruments, motors, electrical appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yo-yo, etc. Non-standard bearing radial clearance of the bearing clearance analysis is divided into the original clearance, clearance and installation work clearance. Often the original bearing radial clearance is greater than the bearing clearance at work. Clearance is one of the important technical parameters of the bearing, it directly influence on the performance of the bearing technology, such as load distribution, vibration, noise, friction, and service life of mechanical motion precision. Strictly speaking, the dynamic load rating of bearing will changes with the size of the clearance. The rated load (listed in the catalogue C and C0) Is the work load value of the gap is zero. If the clearance is too large, the bearing internal bearing area will reduce, on the surface of the rolling contact stress increases, the movement of the bearing will reduce the accuracy, vibration and noise will increase, the service life of the bearing will be shortened. In the process of operation, and may even lead to bearing 'bite'. Therefore, depending on the type of bearing and working conditions to select different levels of the bearing clearance is very important. Standard non-standard bearing internal clearance to C2, standard ( CN） , C3, C4 and C5, met GB4604.