Introduction to Dimension, Type, Selection and Precision of Thin Section Bearings/ Designed for Lightweight Equipment

Introduction to Dimension, Type, Selection and Precision of Thin Section Bearings/ Designed for Lightweight Equipment


The range of cross-sectional areas is between 120.97 and 645.16 mm2 with an inner diameter ranging from 25.4mm to 1.3m.



There are three main types of thin section bearing: thin section radial contact ball bearing, thin section angular contact ball bearing, and thin section four-point contact ball bearing. Each type of thin section bearings has ten different cross-sections, including seven open types (unsealed) and five sealed type, as shown in the pictures above; therefore, thin section bearing has a wide range of loading capacity. The sealed type is only available for thin section radial contact ball bearing and thin section four-point contact ball bearing.



The most important thing for end users to consider is the space requirements within the family of thin section bearings, and next thing a designer needs to consider is working conditions. In general, the thin section radial contact ball bearing mainly supports radial loads, double-direction axial loads, and combined loads. Thin section angular contact ball bearing supports radial loads and single-direction axial loads. Thin section four-point contact ball bearing supports radial loads, double-direction axial loads, tilting moments, etc. Thin section tapered roller bearing mainly supports radial loads and a certain amount of single-direction axial loads.


Except the space and type of bearings, the other application which include operating environment, rotational performance, mounting conditions, precision level, clearance, lubricant, seals and temperature must be considered as well.


Precision Grade

Based on the standards of American Bearing Manufacturers Association, the grades and tolerance specifications of thin section bearings come in five classifications: ABEC1, 3, 5, 7, and 9. The higher ABEC classes provide better precision, efficiency, and the possibility of greater speed capabilities, but do not necessarily allow the components to spin faster. The ABEC rating does not specify many critical factors, such as load handling capabilities, ball precision, materials, and raceway polishing, noise, vibration, and lubricant etc. Due to these factors, an ABEC 3 classified bearing could perform better than an ABEC 7 bearing. Therefore, working directly working with a professional company is the key to make the suitable bearings for specific application.


In fact, with the same inner diameter, thin section bearing has more rolling elements than the standard bearings, which indicates that the contact areas between balls and raceway decreases and thin section bearing are also very sensitive to the rigidity of bearing housing. Therefore, thin section bearing has strict requirements for housing rigidity and tolerance. For a certain loading capacity, we need to apply preload to control the bending and increase the linear rigidity.  USHGT can meet the application requirements with a special thin section bearing design specifically tailored for optimum performance


The picture is showing the relationship between axial bending and axial loading capacity of thin section bearing compared with that of the lightweight bearing. Under an axial load, the bending is like the standard bearing when thin section bearing is under the constraints. Therefore, the flexibility of thin section bearing rings can offset the housing with high rigidity.


Company Overview     

US HGT TECH Corp. possesses a professional technical team with rich experience of over 10 years, mainly engages in design, manufacturing, development, and sales service for Thin Section Bearings, Thin Section Crossed Roller Bearings, Precision Ball Bearings with large size and high speed, and other high precision bearings.


The objective of our company is to provide our customers with a high level of specialized bearing production expertise. If you have a special application that may need a specially designed bearing product, please do not hesitate to contact us! We are confident that we have the capability of providing you with exceptionally well-engineered solutions, outstanding products, and unparalleled customer service.


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