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The Main Points Of Selecting SKF Rolling Bearings

With the improvement of the use of mechanical equipment performance, its use requirements and performance of rolling bearings are becoming more and more diversified. Then when we choose the type of rolling bearings, how do we choose the most suitable type? Usually, we will consider the ease of bearing configuration, installation and disassembly in the shafting, the space occupied by the bearing, the size, and the marketability of the bearing. The type of bearing can be selected. In order to allow us to use more suitable Bearing type, the following analysis of our company for different bearing points teaches you how to choose the most suitable type.

 

1. Installation space and bearing type

 

The design space allowed for rolling bearings and their periphery is limited. The bearing type and size must be selected within its limits. Most mechanical designs first determine the shaft diameter, so most of them are selected based on the bearing inner diameter. There are many size series and structural forms of rolling bearings that have been standardized, and the most suitable bearing type can be selected from them.

 

2. Load and bearing type

 

Comparison of bearing types will indicate the basic load rating of the bearing capacity and the resulting axial load capacity. Compared with the bearings of the same size series, the roller bearing has a greater bearing capacity than the ball bearing, and is suitable for the working condition with impact load.

 

3. Limiting speed and bearing type

 

In addition to the type of bearing, the allowable speed limit of rolling bearings also varies depending on the form of cage, material, bearing load, lubrication method, cooling state, etc. In the case of general oil-bath lubrication, the bearing types are arranged in order from the largest speed to the smallest speed.

 

4. Inclination of inner and outer rings and bearing type

 

Deflection of the shaft due to load, poor accuracy of the shaft or bearing housing, installation errors, etc., cause a tilt between the inner ring and the outer ring of the bearing. The allowable inclination angle of the bearing varies with the bearing type and service conditions, and is usually less than 1.0012 radians (4′).

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When anticipating large tilts in the inner and outer rings, choose self-aligning ball bearings, self-aligning roller bearings, seated spherical ball bearings and other types of bearings with self-aligning function.

 

5. Stiffness and bearing type

 

After the rolling bearing bears the load, the contact part between the rolling element and the raceway will be elastically deformed. The stiffness of the bearing depends on the ratio of the bearing load to the amount of elastic deformation of the inner and outer rings and rolling elements.

 

Machine tool spindles must increase the rigidity of the shaft and bearings. Therefore, roller bearings with less deformation than ball bearings are often used. Moreover, by preloading, the bearing is in a negative clearance state, which can increase the rigidity of the bearing. It is suitable for angular contact ball bearings, tapered roller bearings, etc.

 

6. Noise, torque and bearing type

 

Rolling bearings are manufactured using precision machining technology with low noise and torque. Deep groove ball bearings, cylindrical roller bearings, etc. have noise levels according to the application, and high-precision miniature ball bearings have specified starting torque.

Instruments such as motors and measuring instruments that require low noise and low torque are suitable for deep groove ball bearings.

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7. Rotation accuracy and bearing type

 

For applications such as machine tool spindles that require high rotating body runout accuracy and high speeds such as turbochargers, high-precision bearings such as accuracy grades 5, 4, and 2 should be used. The rotation accuracy of rolling bearings is specified in different items. Different types have different levels. According to different bearing types, compare with the specified maximum rotation accuracy and radial runout of inner ring

Therefore, for applications requiring high rotation accuracy, deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, etc. are often used.

 

8. Installation, disassembly and bearing type

 

Cylindrical roller bearings, needle roller bearings, tapered roller bearings and other inner ring and outer ring structure can be separated, easy to install and remove. Due to regular inspections, when the bearings are disassembled and installed frequently, the bearings of the above structure are more suitable.

 

SKF tapered bore self-aligning ball bearings, self-aligning roller bearings (small), etc., use bushings, which are relatively easy to remove and install.

 

Eric Bearing Limited has been engaged in trade for more than ten years, and its products are exported to more than 50 countries overseas. Whether it is an intermediate trader or an end customer, we have a high evaluation of our products. If you need to buy roller bearings, please contact us.