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介绍了ＢＳ２０－４５型密封轴承性能试验机的设计原则、主要性能和内部结构。该机集防尘、存脂和温升三项性能试验于一机，具有试验效率高、性能可靠、工艺性好和操作方便等特点，为考核密封深沟球轴承的密封性能提供了硬件支持。附图４幅，参考文献４篇。
The design principle, main performance and internal structure of BS20-45 sealed bearing performance testing machine are introduced. The machine set dust, grease and temperature rise of three performance tests in a machine, with high efficiency test, reliable performance, good workmanship and ease of operation, etc., to test the seal performance of sealed deep groove ball bearings provide hardware support . Figure 4, reference 4.