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How to Check the Shape of Angular Contact Ball Bearings?


1. Appearance inspection of angular contact bearings


(1) All kinds of mechanical equipment scars, such as abrasion, scratches, squeezing, knocking, etc., will lead to poor installation of angular contact bearings, resulting in wheel weight and stress, resulting in reduction of rotation precision and service life. 


(2) Rust, dark skin and black spots, the latter two are the disadvantages of very easy storage of moisture and waste, and are most likely to develop into rust. Rust is a contaminant that causes poor installation, initial damage and exhaustion, and more severe rust can damage the bearing.


(3) Various cracks, such as raw material cracks, forging cracks, heat treatment process cracks and cutting cracks, etc., such cracks will become stress sources and expand rapidly during the entire operation of the bearing, causing the bearing to crack, It does great harm to the service life of the bearing and the safety factor during work. In fact, bearing factories have carried out 100% magnetic or radiographic inspection of the component parts for critical primary applications.


(4) Peeling and stretching, the two shortcomings are not stable in fusion with the base metal material, and there are usually different levels of carburization or carbon depletion around it, and the raw material is very easy to collapse, dent or friction coefficient, it is very bad for bearing service life and precision.


(5) The quality of riveting or electric welding of angular contact bearings, the key observation is whether the bolt head is deviated, inclined, loose, lack of meat, whether the welding part is appropriate, whether the electric welding is too large or too small, and whether the electric welding is not strong or too much electric welding will cause the body to be stuck and flipped.


2. Common problems in the application of angular contact bearings


Rolling angular contact ball bearings are high-precision parts, so it is required to be relatively cautious in application. Even if angular contact ball bearings with excellent performance are used, if they are operated incorrectly, the actual effect of the estimated characteristics cannot be achieved. Therefore, the application of angular contact ball bearings should pay attention to many of the following matters.


Keep angular contact ball bearings and the surrounding environment clean. Even if a very small amount of dust enters the angular contact ball bearing, it will aggravate the damage, vibration and noise of the angular contact ball bearing; be careful and careful when installing, do not allow super-strong stamping dies, and do not immediately hit the angular contact ball bearing. The rolling elements transmit the working pressure; use appropriate special tools for installation, use common tools as much as possible, and try to prevent the use of items such as cloth and polyester staple fibers; avoid corrosion and corrosion of angular contact bearings, it is best not to hold the angle directly Contact ball bearings, and then apply high-quality mineral oil before actual operation, especially in rainy seasons and summers, pay attention to anti-rust treatment.