Bearing removal and installation should be equally careful. Careful not to damage Koyo bearings and various parts, especially the interference fit bearing removal difficult operation. Therefore, at the design stage to take into account in advance for easy removal, according to the need to design the removal tool is also very important. In the demolition, according to the drawings of demolition methods, in order to investigate the bearing with the conditions to obtain the demolition job foolproof.
Removing the interference fit of the outer ring, the circumference of the housing in advance several outer extrusion screw is provided with a screw, the screw tightened equally side, while the removal. These usually cover the screw holes blind plugs, tapered roller bearings, etc. separable bearings, the housing block set shoulders several incisions, the use of pads, with press dismantling, demolition, or gently pounding.
Removal of the inner ring can be used to pull the latest simple mechanical pressure. At this time, pay attention to your inner bear its pullout.
Big ball bearing inner ring removal by hydraulic method. By setting the hydraulic pressure to the shaft hole, to make easy to pull. Large width of the bearing is oil law and drawing fixtures and use, disassembly operations.
NU, NJ type cylindrical roller bearing inner ring disassembly can take advantage of induction heating method. Local heating in a short time, after drawing the inner ring expansion method.
Removal more compact adapter sleeve bearings, fastening the shaft stopper supporting inner ring, the nut back several times, using the pads with a hammer and beat demolished.
Large bearings, the use of hydraulic demolition easier, in the cone axis pressurized oil feed hole, so that the inner expansion, demolition bearing approach. Operation, there is the possibility of bearing sudden prolapse, the best use of the nut block as well as files.
A shaft and bearing selection and control room tolerance bearings pressed into the direction of rotation should be no block flexible. If significant rotation is not flexible, then the shaft size is too large, and forbearance decline. As obvious after entering the "imperfections" in a sense of hand rotation shaft tolerance axial bearings or shaft may be too poor roundness. Therefore, a good shaft and bearing in the control room should be controlled at roundness tolerance, tolerance control only for many domestic manufacturers, no roundness control.
2, the bearing assembly method of the bearing is a precision products, such as improper assembly of the channel, it is easy to damage the bearings, bearing damage. In assembling the bearing should have a dedicated mold, can not hit, into the shaft when the pressure forces can only be a small circle, circle, only by the force loop. Congress requested the pneumatic or hydraulic pressure when using the upper and lower outer mold mounted on a horizontal state, if inclined bearing channel will lead to damage of power, leaving the bearing guide ring bearings.
3, the assembly to prevent foreign bodies mounted on the rotor balancing is done, it is prone to iron homeostasis bearing into the bearing, so it is best to do before loading bearing balance. Some manufacturers in order to facilitate assembly, with some oil or lubricating grease internal coating, carriers bearing assembly is often difficult to control the amount, if the oil or fat in a large indoor bearing, bearing accumulate along the axis, easily enter the bearing rotation. Japan is not the best room bearings coated with oil or grease, such as non-coated bearings, without the accumulation of the control room.
4, anti-rust paint paint rust is characterized in that a sealed multi-motor assembly motor sounds good, but put in the warehouse for some time, the motor becomes a very unusual sound, remove the bearing severe rust. Many manufacturers will be considered before the bearing problem, through our continuous publicity, has now been realized that the main electrical insulating paint factory is the question. The main problem is, insulating paint volatile acid at a certain temperature, humidity, corrosive substances, bearing passage leading to the formation of corrosion damage. The only problem now is to choose a good varnish, after a period of drying air assembly.
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