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NSK bearing installation of the standard method and the lubrication and maintenance - bearing knowledge

by:Waxing     2020-05-27
Due to the rolling bearing through antirust processing and packaging, so do not open the packing before installation. In addition, the coating on bearing anti-rust oil has good lubrication performance, NSK bearings for general purpose or filling grease bearing, can not directly use cleaning. But for the instrument bearing or bearing for high-speed rotation, the application of clean cleaning oil washed away anti-rust oil, when the bearing is easy to rust, not for a long time. Clean the bearing and the shell, confirm no scar or mechanical processing of burr. Shell has absolutely can not have abrasives ( SiC and Al2O3, etc. ) Sand, scraps, etc. Next inspection shaft and shell size, shape and machining quality are consistent with those drawings. Installation method of rolling bearing, NSK bearings for cooperate, conditions, structure and decide, in general, as more as the axis of rotation, so the inner circle need interference fit. Cylindrical hole bearing, multi-purpose press pressure into, or multi-purpose hot charging method. Taper hole, installed directly on the taper shaft, or use the socket installation. When installed on the shell, clearance fit more commonly, outer ring have surplus quantity, usually use the pressure into the press and or have shrink fit method of cooling after installation. Use dry ice as coolant, shrink fit installation, the moisture in the air condenses on the surface of bearing. So, need a good rust prevention measures. Bearing installation: the installation of the rolling bearing is accurate, affect precision of life and function. Is, bearing installation plan and remove part of the full research. I hope can in accordance with the scale installation. Homework scale items all of the following: ( 1) Clearing and bearing related components; ( 2) Raid was relevant to the case of intrusive and packing components; ( 3) Installation; ( 4) Bearing installed after a raid; ( 5) The smooth agent of supply. Before installation, just close the packaging bearing. General smooth smooth, not clean, smooth directly fill grease. Smooth oil, are generally not clean, but using the instrument or with high speed bearing, use clean oil wash and remove NSK bearings in corrosion inhibitor. Delete bearing, rust corrosion inhibitor, let's not put aside. Else, has been sealed, vocational training bureau of oil bearing, don't wash directly. Bearing installation way, due to the bearing arrangement, premise and, in general, the more shaft torsional, within the circle of nuisance appropriate request. Rolling bearing should be installed according to the bearing structure, size and cooperate with properties of bearing parts, pressure should be directly in the tight fit on the ring width, shall not be passed on roller pressure, bearing installation commonly adopt the following methods: the installation of the thrust bearing thrust bearing of the matching of the thorough and axis is commonly transition fit, seat and the bearing holes with the general for the clearance fit, so this kind of bearing is easy to install, the center axis of the two-way thrust bearing should be fixed on the shaft, to prevent the relative to the axis of rotation. NSK bearings installation method, usually is the situation of the axis of rotation, so the inner ring cooperate for win cooperate with shaft, with the bearing outer ring and bearing chamber for clearance fit. Force fit tight fit bearing inner ring and the shaft, the outer ring and bearing hole is a loose fit, press the bearing to be pressed on the shaft are available, and then put the shaft together with the bearing load bearing hole, when pressed on the bearing inner ring end face, cushion the assembling casing made of a soft metal materials ( Copper or mild steel) , the inner diameter of the casing assembly should be slightly larger than the diameter of a journal, outside diameter than the bearing inner ring guard slightly smaller, in order to avoid pressure in keeping the frame. To have grease lubrication of rolling bearing and oil seal or dust cover on both sides, NSK bearing seal without cleaning before installation. Check the size of the related parts and finish machining.
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