Linear bearing is a linear motion system with high precision, low cost and low friction resistance.
Linear bearings are used in combination with the guide shaft to achieve infinite linear motion using the rolling motion of the ball.
Linear bearing construction
Linear bearing process
The linear bearing is equipped with steel ball cage inside the outer ring, and the cage is equipped with a number of rolling balls. The two ends of the retainer are fixed with sealing gasket retainer ring, and there are notched Windows in the straight track direction of each steel ball bearing force. This part makes the steel ball under load make rolling contact with the shaft and move relatively with very low friction coefficient.
Therefore, linear ball bearing is the most suitable bearing for mechanical equipment, automatic equipment, energy-saving equipment and so on.
Straight line bearing classification
1. According to materials:
Housing: stainless steel, bearing steel, aluminum alloy (with seat linear bearing);
Cage: resin, stainless steel, bearing steel;
Surface treatment: chrome plating, nickel plating, surface anodizing (linear bearing external fixing seat), etc.
2. Classification according to specifications:
It is divided into two series, namely LM and LME series, whose code name is LM series used in Asia, southeast Asian countries, Japan, South Korea, China and so on. With metric dimension as the standard, the outer diameter tolerance of straight spool is generally h7. LME series are mostly used in Europe, the United States, Germany, Italy and other regions. Standard in inch size, but also in metric size, the outer diameter tolerance of straight shaft is g6. The structure of the two series is roughly the same, except that the size is different and the aperture tolerance is different.
3. By shape:
1）: straight cylinder type (the shape is like a cylinder, and it is usually installed with a clamping spring, which is used for small size installation)
2）: flange type (end or middle mounting flange, can be installed with screws, flange generally divided into circular, square and cut edge type three kinds)
3）: opening type (the shape is like a straight tube, with axial cutting seam on the outside, which is used for occasions requiring clearance adjustment, including large opening and small opening)
4. By performance:
1）: generic (use for general performance requirements)
2）: super type (long life and large load performance requirements)
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