How to choose a permanent magnet lifter

Permanent magnet lifter (permanent lifting magnet) is an easy-to-use, energy-saving and safe lifting equipment for steel plates and profiles;

According to the source material, permanent magnet lifters are classified to ferrite type, samarium iron boron type; according to the discharging method: manual, semi-automatic, automatic type; according to the discharging mechanism: magnetic short-circuit type (manual, mechanical, Electric), mechanical forced open type.

The quality of the permanent magnet lifter mainly depends on the following aspects:

1. Type of magnetic material: Ferrite has a weaker magnetic strength than ytterbium iron boron. Lifting magnets using ytterbium iron boron are generally stronger than ferrite, and the price is also different.
2. The quality of magnetic material: even use the same ferrite, the material is different, while the material is poor, the strength is poor, the magnetic force decays quickly, the service life is short.

3, The maximum suction capacity: according to national standards, the maximum suction force of the permanent magnet lifter should be 1.5 to 2.5 times the rated loading capacity;

1. Pull-out force: which means the force required to pull it off after it has been sucked and stabilized. The pull-out force should be 2 to 3 times the weight of the sucked object (minimum and maximum pull-out force).
2. The bottom of the permanent magnet lifter (suction hanger) is the smoothness of the contact surface, which is also an important aspect to ensure suction and safety.
3. Unloading mechanism: A good unloading mechanism can ensure easy and reliable unloading and stable suction of objects. At the same time, it can also ensure high operating efficiency. Otherwise, a bad unloading mechanism will affect the suction force. Unloading is difficult and operating efficiency is low.

In short: When choosing a permanent magnet lifter, not only consider the price, but pay more attention to the indicators of the magnetic material, structure, maximum suction power, and safety factor.