Installation of rolling NTN bearing dynamic technical guidance

The stand or fall of NTN bearing installed or not, will influence the accuracy of NTN bearing, the life and performance. Therefore, please study fully NTN bearing installation, namely carried out in accordance with the operating standards including the following items, please NTN bearing installation. 1, clean, NTN bearings and related parts of grease lubrication has NTN bearing and oil seal or dust cover on both sides, sealing ring, NTN bearing without cleaning before installation. 2, and check the size of the related parts and finishing the installation of 3, NTN bearing, installation method should be based on NTN bearing structure, size and NTN bearing components with the nature, the pressure should be directly in the tight fit on the ring width, shall not be passed on roller pressure, NTN bearing installation commonly adopt the following methods: a. Force fit NTN bearing inner ring and shaft tight fit, outer ring and NTN bearing hole is a loose fit, can press the NTN bearing to be pressed on the shaft, then the shaft together with the NTN bearing into NTN bearing hole, when pressed on the NTN 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 should be smaller than NTN bearing inner ring guard slightly, so as to avoid pressure in keeping the frame. NTN bearing outer ring and NTN bearing hole tight fit, inner ring and the shaft is a loose fit, NTN bearing can be pressed into the bearing hole first, then assembling casing diameter should be slightly less than the diameter of a hole. If the NTN bearing ring and shaft and hole is a tight fit, install indoor ring and outer ring to pressure into the shaft and hole, at the same time assembling casing structure should be able to at the same time so NTN bearing inner ring and outer ring end face. b。 Heating with heating by NTN bearing or bearing seat, the use of thermal expansion will fit into a loose fit installation method. Installation method is a kind of common and energy saving. This method is suitable for interference quantity larger NTN bearing installation, hot charging before the NTN bearing type or separable NTN bearing ring into the fuel tank 80 - uniform heat 100 ℃, and then loaded on the shaft, as soon as possible out of the oil to prevent inner ring after cooling end face and shoulder joint is not tight, NTN bearing after cooling can be axial tighten again. NTN bearing outer ring and light metal NTN bearing seat tight fit, heating NTN bearing hot charging methods, can avoid the mating surface scratch. Tank heating NTN bearing, should be at a certain distance from the bottom of a mesh, or hanging hooks in the NTN bearing, NTN bearing cannot be on the bottom, in case of heavy impurities into the NTN bearing or uneven heating, fuel tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ℃, in order to prevent the tempering effect, reduce the hardness of the ring. c。 The installation of the cone bearing cone hole can be directly installed in a shaft with taper bearing neck, or load set set of the cone, and the withdrawal of the tightness of cooperate, NTN bearing radial clearance reduction is available to measure, therefore, before installation should measure the NTN bearing radial clearance, the installation process should often measure the clearance in order to meet the need of clearance reduction is, commonly used while installing lock nut installation, also can adopt the method of heating installation. d。 The installation of the thrust bearing thrust bearing of the matching of the thorough and axis is commonly transition fit, seat and NTN bearing holes with the general for the clearance fit, so the NTN bearing is easy to install, two-way thrust bearing axial spring should be fixed on the shaft, in order to prevent the relative to the axis of rotation. NTN bearing installation method, usually is the situation of the axis of rotation, so with the inner ring and shaft for win, NTN bearing outer ring for clearance fit with NTN bearing chamber.