There are many kinds of non-standard bearings, including size, shape and material, such as protruding inner ring, plastic coating of outer ring, grooving of outer ring, etc. Although the installation requirements of non-standard bearings are not strict, some details should be considered. For example, gravel or powder and moisture machines are installed at a distance to prevent air pollution entering the bearing, especially sand, which will damage the life of the bearing. Before installation, be sure to check the bearing surface for adhesion, scratches, sand, rust, etc. If any, remove it immedi