INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Magnets in a speaker

Magnets in a speaker

(OP)
Hello.
I'm going to purchase a large magnet (60x60mm) and cut it lengthwise (it is currently 35mm thick).
It's coated in nickle, I need to safely remove this as it could be a danger (to breathe).
I'd like to some advice on this.
Also I understand I'll need to clamp the magnet on either side as I cut it, to ensure the new magnets do not repel each other and break into smaller bits.
Ideally I like the thickness to be 1.5-2mm thick, but perhaps this is unrealisitc?
I'll be putting these into headphone speakers - do I need to recoat them in nickle? Or is another protective coating available/more suitable?


Thanks
Nathan

RE: Magnets in a speaker

Why can't you purchase smaller magnets, ones more appropriate for a headphone speaker?

At the very least, you should demagnetize the magnet before grinding it.

RE: Magnets in a speaker

(OP)
It will be a neodymium magnet.

RE: Magnets in a speaker

So how are you cutting, wet diamond saw? wire EDM?
This material is very hard and brittle.
Yes, you need to fixture the parts, you could pot them into some castable material.
If the magnet is magnetized you won't be able to do it.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Magnets in a speaker

(OP)
I was going to use a router, diamond saw or tungsten carbide.

But I've been told not to do this as the shavings are likely to explode.
(I guess an oxygen free environment/partial vacuum would've been required).

The magnet supplier said it would be easier & safer to order the thin discs that I require, and they'll come coated to protect from corrosion.

Thanks for your advice.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close