Permanent Magnet Adhesive

Question

Permanent Magnet Adhesive

D24 (Mechanical)

(OP)

8 May 08 15:54

I am building an adjustable-gap yoke that is going to hold two N52 Neodymium cylindrical magnets. Tapered pole pieces will be used to create a field of 1.6T at the center of a maximum 1 cm gap. Does anyone know of an appropriate adhesive for securing the magnets to the yoke and the pole pieces to the magnets? Also, how much will the shape and material of the yoke change the field strength in the gap? Any general advice on working with permanent magnets is also welcome. I know they are very dangerous and want to take any and all precautions.

Thanks in advance

israelkk (Aerospace) · Answer 1 · 2008-05-08 19:13:26

1.6T on a 1 cm gap will probably need huge magnets.

MagMike (Materials) · Answer 2 · 2008-05-09 08:08:14

RE: Permanent Magnet Adhesive

MagMike (Materials) 9 May 08 08:08

D24: What is your application?

D24 (Mechanical) · Answer 3 · 2008-05-09 11:07:41

MagMike,

The setup will be used in an experiment where there will be a 3mmx3mmX20mm piece of metal with permeability similar to steel in the gap. The gap distance is adjustable so the flux density at the center of the gap can be varied. The 1.6T is not absolute. If there is a way to produce a slightly smaller field, say 1.5T, with a simpler setup it would be considered. For safety reasons I've thinking of placing the magnet on the side of the C- shaped yoke, does this make achieving higher flux densities more difficult? Oh yeah, due to power requirements electromagnets aren't really an option.

Thanks Again

daveh55et (Computer) · Answer 4 · 2008-05-12 09:29:19

"supermagnetman" George Mizzel has a video on youtube where he makes a stacked pyramid magnet of 1T. YMMV.

http://www.youtube.com/watch?v=tR_8f0DYK5s

His site:

http://www.supermagnetman.net/index.php

EdStainless (Materials) · Answer 5 · 2008-05-13 08:53:18

Yes, moving the magnets back from the gap makes it harder to achieve high fields.
I always used to use epoxy for bonding. 3M makes some "B" stage formulations called 2214. They are very strong.

I really think that you need to look at electromagnets again. If you want high field and adjustable gap it will be hard with PM.

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

D24 (Mechanical) · Answer 6 · 2008-05-13 11:59:04

Ed Stainless,
I think your right about electro being the way.
thanks to everyone for the advice.

Come Join Us!

Posting Guidelines

Permanent Magnet Adhesive