U-type screw conveyor is a kind of screw conveyor, widely used in grain, chemical industry, building materials, metallurgy, mining, electric power and other departments.
It is mainly for conveying small granular, powder, small lump materials and not suitable for conveying materials that are easy to deteriorate, viscous and caking, as well as materials with large water content.

Classification of screw conveyor by drive mode：
1.When the length of U type screw conveyor is less than 35m, it is single shaft drive screw.
2.When the length of U type screw conveyor is longer than 35m, it is a double shaft drive screw. Distinguished by the type of intermediate crane bearing of screw conveyor：
1.M1- for rolling hanging bearings, which using 80000 type sealed bearings, shaft cover with another dustproof sealing structure.
Commonly used in places where it is not easy to add oil, no oil or oil has pollution to materials, the benefits are good sealing effect, long life of hanging shaft, conveying material temperature ≤ 80 ℃.
2.M2- for sliding hanging bearing, with dustproof sealing device, with cast copper tile, alloy wear-resistant cast iron tile, copper-based graphite less oil lubrication tile.
Commonly used in conveying material temperature is relatively high (t ≥ 80 ℃) or conveying water containing larger materials.

Classification by material of screw conveyor：
1.Common carbon steel U type screw conveyor - mainly suitable for cement, coal, stone, and other industries with high wear and tear and no special requirements for materials.
2.Stainless steel U type screw conveyor - mainly suitable for grain, chemical, food and other industries that have requirements for conveying environment, high cleanliness, long use time and will not pollute the material, but the cost is relatively high.