I want to experiment with modifying a magnetic drain plug. One thing I am not certain of is how they keep the magnet in the center of the drain plug and how the drain plug is made "around" the magnet?
I've tried pulling on the magnet and it doesn't come off. There's a little rotational play but that's about it. Does anyone know how they make these things and keep them together? Is the magnet threaded and do they thread it into the center or something? I suspected this and did a little searching and found this:
But I suspect that's not applicable to Honda ones for example since I see nothing in the square drive hole or any kind of pin they drove it from the circumference to keep the threaded portion from backing out.
Here's the kind I'm wondering about:
I've tried pulling on the magnet and it doesn't come off. There's a little rotational play but that's about it. Does anyone know how they make these things and keep them together? Is the magnet threaded and do they thread it into the center or something? I suspected this and did a little searching and found this:
But I suspect that's not applicable to Honda ones for example since I see nothing in the square drive hole or any kind of pin they drove it from the circumference to keep the threaded portion from backing out.
Here's the kind I'm wondering about: