The handle of the permanent magnet hoist is more difficult to pull up may be caused by the following reasons:

　　First, if the permanent magnet jack does not experience external bumps in the process of use, it is very likely that there is rust inside, which leads to the handle pulling up extremely laborious.

　　Second, the permanent magnet jack has not been cleaned for a long time, resulting in dust, iron filings and dirt in the cracks of the main shaft holes. Too much of these waste chips will directly lead to the spindle stuck, and it is naturally very difficult to rotate.

　　Third, the degree of effort of the handle is related to the utilization of the lifting capacity, such as lifting round workpieces, thin workpieces, workpieces with surface roughness greater than 6.3UM, and workpieces with small suction area, will make the handle difficult to move and unable to move.

　　Fourth, there has been a strong bump in the process of use, if the bump causes the left and right sides of the seal plate to have a bump, it is likely that there is a slight bearing dislocation, this dislocation will lead to the permanent magnet jack handle to pull up becomes extremely difficult.

　　These circumstances will lead to the permanent magnet hoist handle to pull up becomes extremely difficult, so Chenghua manufacturing or remind everyone that we must usually do a good job of the permanent magnet hoist protection and cleaning, so as to avoid the occurrence of such situations.

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