Speed ​​precision IKO bearing installation

High-speed precision IKO bearings are mainly used for high-speed rotating applications with light loads. IKO bearings are required to have high precision, high speed, low temperature, low vibration and a certain service life. The support members of the high-speed electric spindle are often used in pairs, and are the key components of the high-speed electric spindle of the inner surface grinding machine.

Main Specifications:

1.IKO bearing accuracy index: exceeds GB/307.1-94 P4 accuracy

2. High-speed performance indicators: dmN value 1.3~1.8x 106 /min

3. Service life (average): >1500 h

The service life of high-speed precision IKO bearings has a lot to do with installation. Pay attention to the following matters.

1. IKO bearing installation should be carried out in a dust-free and clean room. IKO bearings should be carefully selected. The IKO bearing spacers should be ground. Under the premise of keeping the inner and outer ring spacers high, the parallelism of the spacers should be Controlled below 1um;

2. IKO bearings should be cleaned before installation. When cleaning, the inner ring slopes upwards, the hand sensing is flexible, and there is no stagnation. After drying, put a specified amount of grease. If it is oil mist lubrication, put a small amount of oil mist oil;

3. IKO bearing installation should use special tools, uniform force, no knocking;

4. IKO bearing storage should be clean and ventilated, non-corrosive gas, relative humidity not exceeding 65%, and should be regularly rust-proof for long-term storage.

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Motor INA bearing rust causes

The cause of the rust of the motor INA bearing is very complicated. It may be that the INA bearing is not well treated against rust, 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 the acidic component promotes the hydrolysis of the oil, resulting in an increase in the concentration of the acidic component, causing corrosion of the INA bearing.

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. Wear and protect metal from air and moisture, reduce vibration and noise, and make INA bearings rotate smoothly. However, after the grease is deteriorated, 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 INA bearing corrosion. The second is that the steel ball is in direct contact with the inner and outer raceways, and wear occurs when rotating, thereby causing noise increase.

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