The reason why the motor NSK bearing is rusty

      The cause of the rust of the motor NSK bearing is very complicated. It may be that the bearing is not treated well, or it may be caused by moisture and rust caused by paint mist.
Most of the motor manufacturers use the insulating paint to volatilize the acid components mainly: four: unreacted low molecular paint raw material acid components (anhydrous and terephthalic acid, anhydrous maleic acid, trans Butylene diacid). 2 The acid component formed during curing of the paint (from formaldehyde to carboxylic acid, from formaldehyde to formic acid). 3 Lower fatty acids (formic acid, acetic acid) produced by thermal or oxidative decomposition. 4 The acid component of the cured product after water decomposition. The main acid component produced by the insulating varnish is formic acid, and the amount of formic acid generated is closely related to the degree of rust occurrence. The grease adsorbs the acidic components volatilized in the paint, causing the grease to deteriorate, and this acidic component promotes the hydrolysis of the oil, resulting in an increase in the concentration of the acidic component, causing the NSK bearing to rust.
The working principle of the grease is to separate the steel ball from the inner and outer raceways by using the grease layer. The viscosity characteristics of the grease are attached to the steel ball and the raceway surface, separating the metal interface between the steel ball and the inner and outer raceways, and reducing the metal surface. Wears and protects the metal from air and moisture, reduces vibration and noise, and allows the bearing to rotate smoothly. However, after the grease is degraded, the viscosity will change, the oil film will break through, and the separation function and adhesion characteristics of the grease will disappear. The consequence of this is that the acidic component produced by the insulating paint directly oxidizes the metal surface, causing the bearing to rust. The second is that the steel ball is in direct contact with the inner and outer raceways, and wear occurs during rotation, which causes noise increase.

For more information and purchase please visit: https://www.supplyforever.com

Simple handling of textile sealed bearings

      How to easily clean textile sealed bearings and refueling methods. The introduction is as follows: The new cotton spinning equipment uses a large number of sealed bearings due to dust, heat and high speed requirements. After a certain period of operation of these bearings, the bearings are dry and damaged due to lack of oil inside. For example, the imported air-sea spinning machine has a large number of sealed bearings, and the material is good. However, after several years of use, the grease can not be cleaned and replenished, which causes a large number of sealed bearings to be scrapped, which increases equipment failure and unnecessary expenses.

Two simple and effective cleaning and refueling methods are introduced. The first type of sleeve cleaning and refueling method is suitable for sealed bearings with gaps at both ends of the bearing housing. The method is to first soak the bearing in the kerosene for 1 h to 2 h, and then make a special sleeve according to the outer diameter of the bearing, which can both clean and refuel. The inner diameter of the sleeve is slightly larger than the outer diameter of the bearing from 0.05 mm to 0.08 mm, which is slightly shallower than the bearing. Cleaning and refueling step: add appropriate amount of kerosene into the sleeve, press the bearing into the hand, use the gap of the bearing itself, squeeze the kerosene out, repeat 1 or 2 times; clean and drip before adding the required grease to the sleeve The bearing is placed in the sleeve and gently pressed with a pressure gauge. The bearing oil is flexibly controlled according to the demand. The second type is suitable for special fully enclosed bearings with a gap at one end and a set screw hole. Use the positioning screw hole to communicate with the bearing clearance, first soak the bearing in kerosene for 1 h to 2 h, inhale the kerosene with a special nozzle and oil gun, repeatedly drive the bearing 2 to 3 times, and then use the oil gun to lubricate the required lubrication. Add the fat to it.

      The above methods are applicable to a variety of imported or domestic sealed bearings and special sealed bearings. If these bearings can be cleaned and refueled regularly, they will prolong their service life and save a lot of money and reduce the occurrence of bad cars.

For more information and purchase please visit: https://www.supplyforever.com