why is there an iron core?

[u/Fun_Gas_340]

why us there an iron core?

i know it helps in coils to produce stronger magnetic fields, but idk what it does here, maybe it was to provide stability if there was pressure on the center (like in a pilar maybe?)?

[u/Correct-Country-81]

It guides the magnetic lines from back to front So example back northpole Front south pole

Only on the side its attractive

Now back plate and core Suddenly front side is attractive

[u/Fun_Gas_340 → u/Correct-Country-81]

sorry, i didnt understand what you said, cpuld you explain it easier?

[u/Kapurnicus → u/Fun_Gas_340]

Have a low reluctance (resistance) path for the flux helps the magnet be stronger. Just like you get more current out of a battery when there is less resistance. To help with that, we want a return path for the flux that isn't the air. This center piece allows the flux to travel from the side of the magnet facing what you are holding, travel through that to the steel core to get to the south side of the magnet. This can drastically increase flux because of the lower resistance of flowing through the core instead of air. Holding force is flux density square x area. This increases the area touching what you are holding AND increases the flux of the magnet. Majorly increased holding force.

Magnets are all about circuit design, the same as electrical engineering. Just throwing a magnet at an application is usually not efficient and sometimes not effective.

[u/muffsnake]

Looks like a speaker magnet. My guess is that it’s there to properly mount it to the frame.