When a linear bearing, such as the ST20B linear bearing, is in operation, steel balls roll between the guide shaft and the outer housing. Since the steel balls make point contact with both the guide shaft and the housing, frictional resistance during movement is extremely low, enabling highly efficient and smooth linear motion. The high straightness, precision, and excellent surface roughness of the guide shaft ensure accurate bearing movement. Linear bearings feature a low friction coefficient, low noise, smooth operation, long service life, and low maintenance costs.
A linear bearing consists of the following components:
- Outer Housing (Bearing Sleeve): Usually made of high-strength alloy steel or stainless steel, processed with high-precision grinding to ensure stable inner bore dimensions, as well as high wear resistance and rigidity.
- Retainer (Ball Cage): Made of high-strength resin or metal, its main function is to guide and evenly distribute the steel balls, prevent collisions between them, and improve the smoothness of bearing operation.
- Steel Balls (Rolling Elements): Generally made of high-carbon chromium bearing steel, quenched for high hardness and excellent wear resistance.
- End Caps (Dust Seals): Installed at both ends of the bearing to prevent dust and impurities from entering the interior, retain lubricating grease, reduce lubricant loss, and enhance bearing durability.
After understanding the working principle and structure of linear bearings, proper maintenance during use is also worthy of attention. Dust prevention, rust prevention, and regular lubrication are the main maintenance methods to ensure the accuracy and service life of linear bearings. Without proper maintenance, problems such as jamming, abnormal wear, and rust caused by foreign matter entering the raceway will seriously affect bearing performance and service life.
SQ's anti-rust process
The SQ ST20B linear bearing has an ID (Inner Diameter) of 20 mm, OD (Outer Diameter) of 32 mm, and a length of 45 mm. SQ focuses on product quality and is customer-oriented in all aspects. As one of the top ten bearing brands in China, it represents the bearing industry. SQ will provide product drawings or machining drawings for your confirmation. To learn more about the properties of linear bearings and verify their suitability for your requirements, please get in touch with SQ to receive a customized solution free of charge.
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