In order to achieve the best state of mirror rollers and play the greatest function, special in the production of mirror rollers, add the following special requirements, so that mirror rollers maximize the glow of heat. Mirror roller selection village "according to local conditions" According to the actual use of mirror rollers, the mirror rollers that act as conduction select the No. 20 steel, the mirror rollers with heating function or cooling effect or the weight bearing select no. 45 steel, and the mirror rollers with high non-deformation rates choose alloy forging steel. Maximize the use of mirror rollers In order to improve the rust-proof function, wear-resistant function, anti-stick function, etc. , according to the use of selective roller surface electroplating hard chrome, spray ceramics, spray Teflon and other treatment. Late refined cars, fine grinding, etc., are the key factors to ensure the straightness, balance, non-roundness, coaxiality and so on.