Release time : 2015-06-11 07:56:52
By Bearing Manufacturer>Bearing News> When buying ball bearings,we need to consider the seven points
Rotation where there bearing instructions bearing the broad range of applications, but the type of bearing can be tens of thousands, it's trouble to buy ball bearings, hope following a purchase points that can help you address this situation with better Select bearings.
1) bearing installation space: able to accommodate in the bearing installation space within the bearing type
Design shafting focus shaft rigidity and strength, it is usually the first to determine the shaft diameter, that bearing diameter. But there are a variety of rolling bearings of dimension series and type, should buy the most suitable type of ball bearing.
2) load: the size of the bearing load, direction and nature of load bearing capacity of the basic load rating, the value contained in the bearing size table
The bearing load is varied, such as the size of the load, whether or not only a radial load, axial load is unidirectional or bidirectional, vibration, or the degree of impact and so on. After considering these factors, you can buy the most suitable type of ball bearing.
In general, the same as the inner diameter of the bearing radial load capacity according to the following order: deep groove ball bearings
3) Speed: to adapt the mechanical speed of the bearing type bearing speed limit value basis Limiting speed, the value contained in the bearing size table
Bearing speed limit not only take on the bearing type is also limited to bearing size, cage type, accuracy class, load conditions and lubrication method, therefore, the choice must consider these factors.
4) rotation accuracy: bearing type having a desired rotational accuracy of the dimensional accuracy of the bearing and rotation accuracy by GB bearing type standardized
Machine spindle, gas turbine and control machine requires high rotational accuracy, high speed and low friction, then you should use more than five precision bearings.
5) Stiffness: can meet the required rigidity of the mechanical shafting bearing type bearings to withstand load, the rolling elements and raceway contact portion is elastically deformed.
"High rigidity" refers to the amount of deformation of this elastic deformation is smaller] in the machine tool spindle and the final-stage reduction gear device of the automobile and other parts, to improve the rigidity of the shaft at the same time, must also improve the rigidity of the bearing.
6) of the inner ring and the outer ring relative inclination: the analysis so that the bearing inner ring and the outer ring relative tilt of factors (such as the load caused by the deflection of the shaft, the accuracy of the shaft and housing, bad or mounting error), and choose to adapt this kinds of conditions of use of bearing types.
If the relative inclination of the inner ring and the outer ring is too large, the bearing will generate internal load damage. Should choose the type of bearing can withstand this tilt.
7) installation and dismantling: the periodic inspection of the assembly and disassembly and installation method dismantle frequently use separable inner and outer rings of cylindrical roller bearings, needle roller bearings and tapered roller bearings is more convenient.
Aligning ball bearings and tapered bore Spherical roller bearings sleeve through the use of fasteners or refund can be easy to dismantle.