Lubrication and precautions for IKO spherical plain bearings

Although the IKO oil-filled spherical plain bearing can move without oil when the load is small and low-speed swinging, it is generally lubricated with grease and needs to be replenished regularly. It is recommended to shorten the refueling interval when starting. Most of the lubricants use lithium soap-based grease (NLGI consistency number 2) containing molybdenum disulfide (MOS2). Oil-free spherical plain bearings are maintenance-free products and do not require oil. However, filling with lithium soap grease before use can ensure a longer life. In addition, filling grease around the bearing can play a role in preventing foreign matter intrusion and bearing corrosion. The number of oil holes on the inner and outer rings is shown in Table 15. Table 14 Load direction coefficient b1 Load direction Load direction coefficient b1 1 0.2 (1) must be alternated Note (1) Indicates the load direction coefficient when a slow alternating load acts, if it is a fast alternating load, it will drop rapidly, Please consult Qingdao Ruijing Electromechanical Equipment Co., Ltd. Table 15 Number of oil holes on inner and outer rings Bearing model oil-filled spherical plain bearing metric series GEE GEG SB, SBA GEES, GEGS SBB GEEC inch oil-free spherical plain bearing metric system. Operating temperature range The operating temperature range of bearings with gaskets is -30 to 80 °C. The maximum allowable temperature of bearings without gaskets is 180°C for oiled type and 150°C for non-oiled type. ■Precautions for use The design of the shaft is generally under heavy load, since it can slide on the inner diameter surface of the shaft and the inner ring, so the hardness of the shaft needs to be above 58HRC, and the surface finish should be within 0.8μmRa. In addition, since the limits of the shear stress and bending stress of the shaft are often below the static load capacity of the IKO spherical plain bearing, it is necessary to pay special attention to the strength of the shaft. Design of the housing The housing needs to be rigid enough not to deform due to the load. When using a housing of the shape shown in Figure 6, the housing must be designed to have the following strengths. Fig.6 Shape of bearing seatFig.7 Stress concentration factor installationFig.8 Split surface and load direction of outer ringFig.9 Installation methodFig.10 Installation example 1 When installing this bearing, as shown in Fig. 8, align the cut surface of outer ring Position it at right angles to the load direction, and be careful not to apply the load on the split surface as much as possible. Please refer to the dimension table for the dimensions of the shoulder portion of the 2 shaft and the IKO housing. 1 Loads are applied in the YL direction. When selecting materials, consider the compressive stress obtained by the following formula. σ1u003dF (9)CD where σ1: maximum compressive stress acting on the inner diameter of the bearing housing N/mm2 F: load N C: outer ring width mm D: outer ring outer diameter mm2 Select the material when the load acts in the YU direction When considering the compressive stress obtained by the following formula. σ2u003d F k (10)C(DH-D) where σ2: the maximum tensile stress acting on the bearing housing N/mm F : load load NC : outer ring width and bearing housing width mmDH : bearing housing outer diameter mmD : Outer ring outer diameter mmk : Stress concentration factor (refer to Figure 7) When the interference side is installed, when the inner ring and the outer ring are installed at the same time, the stress concentration factor is divided into surface load 450 451.