1. Basic concept:
Linear bearing is a linear motion system with high precision, low cost and low friction resistance. Linear bearings are used in combination with guide shafts, and use the rolling motion of the balls to achieve infinite linear motion.
Since the bearing ball is in point contact with the shaft, the use load is small. The steel ball rotates with minimal frictional resistance, so that high-precision and smooth motion can be obtained.
2. Structure
3. In the working process, the linear bearing is equipped with a steel ball cage in the outer ring, and the cage is equipped with multiple balls, and the balls move in an endless loop. The two ends of the cage are fixed by sealing gaskets and retaining rings. There are notch windows in the linear orbit direction where the steel balls work under force. This part is to make the loaded steel balls make rolling contact with the shaft, with a very low friction coefficient. Relative movement.
Therefore, linear ball bearings are the most suitable bearings for mechanical equipment, automation equipment, and energy-saving equipment.
Fourth, classification:
1. Divided by material
Housing: stainless steel, bearing steel, aluminum alloy (linear bearing with seat);
cage: resin, stainless steel, bearing steel;
surface treatment: chrome plating, nickel plating, surface anodic oxidation (linear bearing outer holder) and the like;
Our Available from linear bearing housing is bearing steel, lined with resin cage, no surface treatment of the product; linear bearing seat belt is more common linear bearing insert outer aluminum housing.
2. According to the shape, it can be divided into
open type and closed type;
straight column type, single liner type (ordinary type), double liner type (extended type);
single liner type with flange, double liner type with flange; double-
sided cutting flange type , Intermediate cutting flange type, four-sided cutting flange type;
heightened square with fixed seat (fixed seat made of aluminum alloy, surface anodized), widened square with fixed seat, etc.
3. Divided by series
Linear bearings are divided into two series by series, namely LM and LME series.
LM series are used in Asia, Southeast Asian countries, Japan, Korea, China and so on.
LME series are mostly used in Europe, America, Germany, Italy and other regions. The structural characteristics of the two series are roughly the same except for the different sizes and aperture tolerances.
