Needle roller bearing installation disassembly method is introduced

The installation of the needle roller bearing removal methods introduced 2019 - 11 - 14 the: we all know there are a lot of bearing installation is is to pay attention to details, such as: to lubricating axial surface, pay attention to the dust, etc. , but the installation of the needle roller bearing and other bearing the same? Here is to introduce the unusual needle bearing installation and removal. Keywords: auxiliary roller installed, auxiliary sleeve, disassembling method needle roller bearings, usually using auxiliary sleeve. At this time, the auxiliary roller or auxiliary sleeve hold needle don't fell out of the needle, journal with its own chamfering needle lift, as the needle roller bearing on the shaft neck slowly moving into, the auxiliary roller or auxiliary sleeve out slowly, until outfit to the job position. Auxiliary roller, the outer diameter of auxiliary sleeve should be smaller than shaft diameter 0. 1 - 0. 3mm。 When installation, the surface coated with grease inside the bearing outer ring first, rely on tight inside surface needle ( In the last needle should be gaps) , then replace the journal of the roller bearing inner ring or auxiliary sleeve into the outer ring hole, and make it face alignment installed shaft end face or installed on the shaft bearing inner ring end face, and then use pressure on the press or hammer knock. Needle roller bearing and it can be installed, apply a thin layer of lubricating oil, the auxiliary sleeve diameter set into the bearing outer ring and the auxiliary sleeve and bearing outer ring form a circular hole, and then install needle in the annular aperture. After loading the needle, work with axial auxiliary sleeve will launch. For without inner ring or outer ring needle roller bearing, when installation, can be the first shaft hole or shell rolling surface coated with a thin layer of grease, and combine needle in close to on the installation position of grease. Finally a rolling needle stick shall be gaps, the size of the gap in the needle roller bearing on the circumference of a circle to 0. It is advisable to 5 mm. Can't work out the final hard packed into a needle, or less a needle, because hard packed, the bearing will be stuck can't rotate; Short-ship, clearance is too large, easy to cause bearing needle roller twist and break during operation. For only the stamping outer ring needle roller bearing, due to the outer wall is thin, don't use hammer knock installation, press pressure should be used. Because when hammer knock, uneven pressure, easy to produce local deformation make needle roller bearing outer ring. Bearing before installation should be injected into the right amount of grease, under normal circumstances, after the assembly no longer BK type bearing lubrication for shaft neck without out of the bearing, encloses the seal effect, and can withstand the small axial winding. Remove methods folding knock knock force general on bearing inner ring, shielding room tapping force should not be added in rolling element bearings and keep on the shelf, this method is simple, but easily damaged bearings, when bearing, at the end of the shaft, use less than the copper rod of bearing inside diameter or other soft metal materials resist shaft end, lower bearing block, hammer knock gently, can be removed. Application of this method should pay attention to the position of the block placed properly, focus should be correct. Thermal method is used to remove the interference fit of bearing. First will be heated to 100 ℃ or so oil in oil pot pouring in to dismantle the bearing, after waiting for bearing ring heat expansion, can be used to pull pull the bearing. Push method with press thrust bearing, the work is stable and reliable, does not damage the machine and the bearing block rooms. Mechanical or hydraulic press with manual push, press push. Note: press the focus should be at the center of the shaft, the partial pressure is not allowed. Pull folding method using puller, remove, as long as the rotating handle, bearing will be slowly. Remove the bearing outer ring, pull two foot corners should open outward; Remove the bearing inner ring, with both feet should be inward, card on the bearing inner ring end face. Needle roller bearing capacity big, applicable to the limited size of installation supporting structure, widely used in machine tools, metallurgical machinery, textile machinery, printing machinery and other machinery and equipment, and can make the mechanical system design more compact and nimble. （ Source: henan runhua general equipment co. , LTD. )