Date: 2013-08-20

Bearing mounting accuracy

The check bearing should astigmatism lamp bearing the appearance of cracks and other parts of careful observation.
1, various mechanical injuries, such as rubs, scratches, bruised, bumps, etc., can cause adverse bearing installation, causing partial load and stress concentration caused by the decline in rotation accuracy and service life.
2, rust, black and pitting, the latter two are easy to store moisture and dirt defects, most likely to develop into rust. While corrosion leading to poor installation, the source of contamination of early wear and fatigue, severe corrosion causes the rolling bearing scrapped.
3, various cracks, cracks such as raw materials, forging crack, heat treatment cracks and grinding cracks, these cracks will become the source of stress concentration in the bearing during operation of the later, and rapidly expanding, causing bearing broken, the bearing life, and safety at work great impact. In fact, for the important purpose of Rolling Bearing Factory has its component parts and 100% magnetic ray detection checks.
4, from the skin and folding defects local base metal combined with unsound, and its surrounding often exist to varying degrees of decarburization or depleted carbon phenomenon, the materials are easy to caving, debossing or wear of the bearing life and accuracy is disadvantage.
Organic solvent into the fixed end bearings on the shaft before installation: the bearing with clean cleaning kerosene thorough cleaning of 3% to 5%, the first containing grease for grease lubrication bearing for degreasing and cleaning, oil gun grease filled in the bearing of quantitative; heating bearings so that the temperature rise from 20 to 30 ℃, oil press bearing onto the shaft; adapter casing pressure on the shaft and pointed at the right pressure end bearings axially positioned; spring scale tape volumes in the bearing outer ring, pre-load under the method of measuring the starting torque check whether there are significant changes.

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