Classification of linear bearings (1) Standard type, clearance adjusting linear bearing, open linear bearing, extended linear bearing, general linear bearing (2) Flange linear bearings can be divided into: circular flange type, method flange type, elliptical flange type, guide circular flange type, guide method flange type, guide elliptical flange type, and extended circular flange type. According to the specification and system: It is divided into two series, LM and LME series Its code LM series is used in Asia, Southeast Asia, Japan, South Korea, China, etc. Taking the metric dimension as the standard, the outer diameter tolerance of the matched linear shaft is generally H7. LME series are mostly used in Europe, the United States, Germany, Italy and other regions. English dimension is the standard, and metric dimension is also available. The outer diameter tolerance of linear shaft used is generally G6. The structural characteristics of the two series are roughly the same except for different sizes and different aperture tolerances. By shape: 1: Straight cylinder type (the shape is like a cylinder, which is generally installed with a snap ring, and is used for the installation of smaller sizes) 2: Flange type (there is a mounting flange at the end or in the middle, which can be installed with screws. The flange is generally divided into round, square and chamfered types) 3: Open type (the shape is like a straight cylinder, with axial slit on the surface, which is used for occasions requiring clearance adjustment, including large opening and small opening) By performance: 1: Ordinary type (purpose of general performance requirements) 2: Super type (occasions with long life and large load performance requirements) Zibo Harbin Bearing company specializes in providing linear bearing products.