DC 12V 250N 55LB/25Kg Electric Lifting Magnet Solenoid Holding Suction Electromagnet, 40 X 25mm

I got the 70 KG version, and 24 volts this seems to hold with about 70 kg of force, though I don't have a spring scale to confirm this. The magnetic force seems to exponentially increase as the input voltage is increased. (These magnets don't have to be run at full power) After an hour of running in the PVC sleeve in which I will mount this, the temperature of the magnet is about 177 °F. The seller states it should withstand temperatures up to 155 °C (310 °F), so I've been torture testing it for around 2 hours, and don't see any problems except that the bare magnet is well above hot enough to burn you if you touch it. I'm not sure if the 12V version of this magnet would generate more or less heat, or no difference at all. Nominal wattage of the magnet appears to be ~9 watts, but after reaching high temperatures the current drops off due to increased resistance and wattage is ~7 watts. Be aware though if you need a longer bolt than the one provided, as the bolt size description may be wrong. The bolt size listed for the 70 kg magnet is M5, but it's actually an M8 bolt.

After applying the necessary amperage, the magnet held tight but it wasn't for my project as the force had to be very close to the metal object. At first I used 2 APC batteries and they did very little. Switched to car battery and held tight. So if you need that type of thing, might with for you. Just understand that they have to be close in proximity.

people complaining its not strong as expected, but its a coil of wire about 220ohms . with iron in middle, idk what you were expecting. sorry if the laws of physics werent quite what you were expecting.

Absolutely trash. Wouldnt pick up a paperclip. Dont waste ur time or money on this.

I've tried supplying the required current and it's no where close to 176lbs. Maybe 80lbs.

I'm using this little magnet to temporarily hold bearings onto a bearing-applying tool and I gotta say... it's a lot stronger than I expected it to be. It's almost impossible to get the bearing off when it's powered on. I mean the magnets diameter is the same size as the bearing so that makes it more difficult but still... really strong little magnet. Very happy with this purchase :)

Was looking for a holding magnet to hold a 2lb humane cat trap door up. Retro-ed trap for electric release and this 100% duty cycle magnet worked great.

effective for the project were were doing, while not stated they are sealed and water resistant.

Does not work out of packet

The product is rated to hold 10 kg but in my application it did not consistently hold my load which was less than 10 kg, therfore I had to return it for a magnet with a much stronger holding force.

Don’t waste your money !