A magnetic lifter is a machine used to lift, rotate, or reposition metal parts by means of creating a magnetic field between the lifter and the loads and hence the lifter can attract the objects. Generally speaking, regardless of the types and brands of the magnetic lifters, they all have the similar design to create the necessary magnetic field to attract loads. The permanent magnetic lifters are the ones that apply the permanent magnet to create the magnetic field. A permanent magnetic lifter is capable of creating a stronger magnetic field.
The use of a magnetic lifter is convenient since it does not require additional binding or fixture mechanism to hold the loads in place. All it takes is the magnetic field to clamp and secure the objects. This way, the loading and unloading of the parts can be done more efficiently. However, the magnetic lifters can only be used to clamp magnetic objects. In other words, the only objects that can be lifted by a magnetic lifter are metals. That being said, not all types of metals are magnetic and therefore not every type of metal object can be lifted by the magnetic lifter.
A magnetic object can attract or repel the other piece of magnetic object. The attraction and repulsion of the magnetic objects can have many applications in the modern world. One of the industrial applications of magnetic metals is the magnetic lifters. The permanent magnetic lifters can be magnetized to create a magnetic field to attract magnetic objects. When it comes to magnetic objects, it is usually metals that come to people’s mind. However, not every type of metal is magnetic.
There are magnetic metals and non-magnetic metals. The magnetic metals are the ones that contain iron in the composition: the ferrous metals. Depending on how much iron there is in a piece of metal, the magnetic force can be strong or weak. As for those metals that do not have iron content, they do not attract and repel each other. The non-magnetic metals include aluminum, copper, gold, and silver, etc. The only magnetic metal that does not contain iron is nickel.
To create a magnetic field, there is the North pole and the South pole on a permanent magnetic lifter. The lifters usually have the design with the two poles at the bottom of the machine. With these two poles, the magnetic lifters can create magnetic flux path through them. The magnetic flux path is controlled by the on and off switch. When the machine is on, the magnetic flux path is created and the magnetic field is formed to attract loads; when the machine is off, the path is discontinued and the lifter stops attracting loads.
The permanent magnetic lifters have strong attraction because they are built with higher grade magnets. Since the high grade magnet has stronger magnetic force with the same given volume, the magnetic lifters made with it can have smaller volume and lighter weight while sustaining the power. As a result, the magnetic lifters are ideal for lifting steel-based components. They are widely implemented in heavy industries such as ship engineering, transportation, and machinery manufacturing.
The permanent magnetic lifters are very compact in size and light weighted since they are built with high grade magnets. They are applicable for lifting flat and round shape materials. Since they have strong attraction power, the lifters have a high lift to weight ratio. In addition to its size, weight and power, the ease of use is also another important advantage. Because the simple on and off mechanism offers quick and easy operation, heavy loads can be moved by only one operator.
Though the permanent magnetic lifters are useful when carrying heavy loads and easy to operate, there is still a couple of notes that the operators should pay attention to when using such machines. The factors that may affect the performance of the lifter are the temperature of the working environment. Based on the types of magnets the lifter applies, the lifter is likely to lose strength as the temperature rises.
The object that the lifter carries also affects the performance. The rated capacity and cylindrical capacity are important as they represent the maximum working weight for non cylindrical objects and cylindrical objects respectively. Since the cylindrical objects have less surface area to clamp, the cylindrical capacity is usually less than the rated capacity. The lifting of loads should follow the suggested capacity strictly in order to avoid malfunction of the lifter during operation.
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