The mica tube screw is made of high-quality muscovite paper or phlogopite mica paper with appropriate high-performance organic silicone, bonded and wound on a stainless steel screw, and then processed by baking. It has good electrical insulation properties and high mechanical strength, and is suitable for high-temperature insulation in high-temperature electric furnaces such as steel and metallurgy, as well as various electrical appliances, motors, and electric furnaces. Compared with traditional ceramic tubes, mica has the characteristics of easy control of wall thickness and ovality, uniform discharge, and resistance to breakage. It is an ideal substitute for some ceramic tubes. The Changfeng mica tube is produced by machinery and is monitored by electronic measuring devices. The product has smooth inner and outer walls, good roundness, good uniformity, high strength, good compactness, and a maximum density of up to 2.0g/cm3. It is known for its high strength. With the advantages of high temperature resistance, high strength and high precision, we can process any difficult mica tube products for customers according to the drawings. The mica tube screw is divided into muscovite tube and phlogopite tube with a temperature resistance of 800-1000°C. The length of the mica tube made by our factory is between 10-1000mm and the quality is stable. Special specifications of mica tube can be made according to the drawings provided by the user. (For example, slotting, bonding, etc.). Special specification pipe screws can be processed with samples and drawings. Tolerance standards: In general, we produce according to the standard of the upper tolerance of the inner diameter and the negative tolerance of the outer diameter. According to customer requirements, we can control the tolerance within 0.2mm.