Shaftless spiral

Screw conveyor has advantages of simple structure, low manufacturing cost and convenient maintenance. It has been widely applied in various departments of the national economy. The main technical difficulty of the screw conveyor is the processing and cutting procedures of the screw blades.

There are always two kinds of cutting methods:

One is the cold rolling forming method, the basic process is to pass the raw material steel strip through the tapered roll on cold rolling mill to form a continuous annular band, and then through the spiral duct device, it will become spiral blade which has left (right) rotation and certain pitch, this method is always suitable for lot production.

About the cutting which is for non-batch production, it always uses the single blade welding method. The basic process is to cut the flat steel plate into a single ring with a notch, and press it into a single spiral blade (a pitch) on the mold, then welding the single blades on the center shaft manually to form a continuous blade, it has simple process and often used for grain and oil, feed enterprises.


Material: Stainless steel; High Quality Low Carbon Steel.

Work Range: Out dia.: 35-800mm; Inner dia.: 12-750mm; Thickness: 1.5-8mm.

We can make different sizes continuous cold rolled helical blade without welding.

Advanced technology process creates superior quality, saving raw materials.

Continuous cold rolled helical screw blade has features of smooth surface, high hardness, wear resistance and continuous weld-free.

We can accord to the customer's requests to produce the spiral blade with arbitrary outer diameter, arbitrary diameter, arbitrary length, arbitrary pitch, arbitrary thickness and arbitrary direction.

Main Application: Used for the transmission devices for the Combine Harvester, Grain Machinery, Threshing Machinery, Poultry Feed Machinery, Snow Blower, Drilling Machinery, Construction Machinery, etc.

As the main spare part, screw blade plays a vital role in driving material movement. In general, screw blade can help complete conveying operation, at the same time possessing the functions of stirring and mixing materials.

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