The optical axis of the working principle and purpose, we l Lishui Cheng Feng Bearing Co., Ltd. is specialized in producing all kinds of bearings Lishui, optical axis, side rails and other commonly used auto parts, may not be the people in this industry are not very clear what the optical axis Linear roller bearings, is not very clear principles and purposes of their work. So let's take a look at what is the optical axis and the axis of the working principle and use it. Before understanding the optical axis we first look for what purpose is the symmetry axis of the optical axis of roller bearings, centerline beam (beam) or optical system. The beam around this axis of rotation, there should be no change in optical characteristics. However, when the light from a particular direction by a non-homogeneous body stones, birefringence does not occur, the particular direction of the optical axis is a gemstone. Among linear bearings, and can be divided into many sub-categories, linear bearings specifically what you classify it? We take a look at: linear bearings into metal and plastic linear bearings linear bearings Buying metal roller bearings, linear bearing metal is a low-cost production of linear motion systems roller bearings wholesale for unlimited travel with the cylinder axis. Since the ball bearing and the shaft was the point contact, so the use of the load is small. Minimal friction ball rotation, which can obtain high precision smooth movement. Roller bearings Model Specifications _ Feng Cheng bearing trusted (authenticated) _ Kunming roller bearings supplied by Cheng Feng Bearing Co., Ltd. Lishui City. Cheng Feng Bearing Co., Ltd. Lishui City (susan1125.b2b.hc360.com/) quality services and products, and are subject to approval and trust of new and old customers and the industry. Our company is a certified member of the whole network Commercial Union, Commercial Union Support icon on the page, you can talk directly to our customer service staff, to our future cooperation happy!