Hand expansion shaft

Hand expansion shaft has only begun to rise in recent years, and it has really been promoted during the epidemic, and the handle expansion shaft of the mask machine has been pushed to a new height. Hand expansion shaft has obvious characteristics, basically are very short unilateral cantilever shaft, are applied to the winding material is very light equipment, its function is the clamping effect, which let us get inspired, only the expansion and contraction function can meet customer needs, the use of screw principle, the function of the handle expansion shaft is solved. And in terms of cost and service life, the advantages are far more obvious than the inflatable shaft. However, in some high-load and major lengths, the manual expansion shaft can not reach the requirements of use, and it is still necessary to use the air expansion shaft to solve the problem.
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Hand expansion shaft also has key type and plate type, but mainly the plate type is more widely used, because the key expansion is a separate key in contact with the tube core, to be firm or plate expansion shaft, key expansion shaft is more suitable for making some small diameter shaft, its flexibility is stronger, so we see that the conventional hand expansion shaft is mostly plate type, but like 4 inch, 2 inch, 2 inch, 2 inch, 3 inch. The 1 inch hand expansion shaft is mainly key type, the reason is that the plate tile is an arc, there is no suitable tile material, and the mass production of the grinding tool has to be opened, which leads to the cost is too high, and there are structural limitations, the small hand expansion shaft or the key type, the tile type hand expansion shaft still cannot meet the structural design.