Can I remove these magnets ?

[stormbird]

Hi all

Just wondered if these magnets can be removed ?
I did remove a cir-clip from the grove visible in the shaft , however not seemed to make much difference ?

Before it goes to the dump ?

They may come in handy for the camper ?

Paul

 

[DannyC]

Yes, you may remove the magnets, but don't make a mess. Good of you to ask.

 

[stormbird]

Yes, you may remove the magnets, but don't make a mess. Good of you to ask.

If you adopt that attitude it will be in the post to you !

Paul

 

[undertoad]

You need to get the rotor shaft out first?
It's probably pressed in - Do you have a press?

 

[stormbird]

You need to get the rotor shaft out first?

Looks like it may be keyed in , I will take some better pictures.

It's probably pressed in - Do you have a press?

Sadly no , I do know a man with one , however not worth bothering him just to attempt some magnet recovery ! DannyC suspects they are epoxied in and will ' self destruct ' [ very brittle ] if any attempt is made to lever them out.

Paul

 

[undertoad]

Danny's right, they are likely epoxied in place - You can soften epoxy with heat, but that might kill them just as dead, anyway

 

[Radical Brad]

They are definitely epoxied!
I wanted to salvage these from a dead scooter motor and used a torch to heat the outside of the shell until the epoxy softened enough to pry the magnets. You may break the initial one as there isn't much gap. A few warnings...

These are NIB magnets and shatter easily.
Overheating reduces their strength.
They are fun when they clamp your fingers!

Brad

 

[Popshot]

The ones on a Mobike aren't glued in. They were just prise gently and pull out. Vicious little buggers too. They are determined to find their opposite regardless of what you have between them.

 

[undertoad]

Vicious little buggers too

We have a sewing shop -
Some of our work is "technical gear", and we've had occasion to incorporate some pretty strong NIB magnets into fabric components.
It gets interesting, dealing with them on the cast iron beds of the sewing machines

 

[Radical Brad]

We have a sewing shop -
Some of our work is "technical gear", and we've had occasion to incorporate some pretty strong NIB magnets into fabric components.
It gets interesting, dealing with them on the cast iron beds of the sewing machines

Yeah, they can bite!
I did some magnetic separation R&D years back using insanely powerful magnets to alter the specific gravity in a chloride liquid.

For that, I purchased buckets of hockey puck sized NIBs. They are so scary to handle that I individually wrapped them in towels and store them in a far corner of the basement so they don't mess with any of my retro CRT gear.

Two of them will stay stuck on either side of your chest from the pull the create together.
As for fingers.... bad idea!

Brad

 

[undertoad]

I can't imagine magnets like that, of that size................... No, I don't think I'd go there

 

[Radical Brad]

They are certainly interesting to handle! I also have 50 or so 3 inch by 1 inch nibs and made a few Halbach arrays. It took the force of a vice to get them in place. They are just stupid strong.

The round ones I have are slightly larger than these ones.

4" x 2" Disc - HUGE - Neodymium Magnet

1 magnet Pull Force: 783.30 pounds per magnet SKU# M4x2DI

www.apexmagnets.com

Each one has a dish cloth wrapped around it with tape, but there is still a clamping danger.

Brad