As the name suggests, this is an insulation method where the insulation layer is placed on the outside of the main wall material. This approach helps reduce the impact of thermal bridging and protects the primary structural material from temperature-induced stress and deformation. It is currently the most commonly used insulation technique and is also the method strongly recommended by national building standards. By applying insulation externally, buildings can achieve better energy efficiency, improved thermal comfort, and long-term structural integrity. This practice has become a key component in modern construction for both residential and commercial buildings. Single-direction Thrust Ball Bearings Thrust ball bearings with the contact angle of 90 degrees can only bear axial load with low speed limit. The single direction thrust ball bearings of SS51000 series can only bear axial load in one direction and can limit the axial move of the bearings and the outer cover in one direction with the outer cover. Single Direction Ball Bearings,Thrust Washers Bearing,Thrust Washers Bearings,Single-Direction Thrust Ball Bearing Yuyao Shuguang stainless steel bearing Co., LTD , https://www.shuguangbearing.com