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为保证较好的声学特性和经济性,在磁带录音机的小功率马达中大多数轴承都采用了烧结金属滑动轴承。这类轴承的主要缺点是在较高温度下使用寿命短。在СПКТБМЭМПО“Элъфа”进行的实验表明,若只用孔隙里贮存的油来进行润滑,则在负荷为0.37百万牛顿/米~2和温度在90～100℃下,浸以石油油料的БΓР4材料制造的轴承寿命不超过800小时。由于油的氧化使润滑膜中形成了粘性沉积物这是轴承发生故障的主要原因,它使摩擦力增大以致马达被卡住。在马达卡住前,由于孔隙为磨损和油聚合的产物堵塞,润滑油已不再从孔隙里流向摩擦区。各种油透过性的轴承的试验表明,孔隙堵塞的时间取决于孔隙大小。孔隙越小,马达无故障工作的时间就越短。为了确定工作寿命与轴承孔隙率的关系,用粒度级为:50～250;100～160;63～100及小于50微米的粉末烧结的ЖΓр1材料制成了四批烧结金属轴承,根据孔隙率为24%的轴承的渗透性判明了孔隙
In order to ensure good acoustic properties and economy, the majority of bearings in low-power motors for tape recorders use sintered metal plain bearings. The main disadvantage of this type of bearing is a short service life at higher temperatures. Experiments carried out in СПКТБМЭМПО “Элъфа” show that if only the oil stored in the pores is used for lubrication, the БΓР4 material soaked in petroleum oil with a load of 0.37 million Newtons / m 2 and a temperature of 90 to 100 ° C Manufacturing bearing life does not exceed 800 hours. This is a major cause of bearing failure due to the formation of a viscous deposit in the lubricating film due to the oxidation of the oil, which increases the friction so that the motor is stuck. Before the motor gets jammed, the oil no longer flows from the pores to the friction zone due to the pores being clogged with abrasion and the product of the oil polymerization. Tests on various oil-permeable bearings show that pore plugging time depends on pore size. The smaller the aperture, the shorter the time it takes for the motor to work without any problems. In order to determine the relationship between working life and bearing porosity, four batches of sintered metal bearings were made from powder-sintered ЖΓр1 material with a particle size of 50 to 250; 100 to 160; 63 to 100 and less than 50 microns, The permeability of 24% of the bearings determines the porosity