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Attaching Rare Earth Magnets

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Forum topic by Peter Oxley posted 2392 days ago 5002 views 0 times favorited 8 replies Add to Favorites Watch
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Peter Oxley

1426 posts in 2509 days


2392 days ago

Topic tags/keywords: rare earth magnets attach glue epoxy

I’ve meant to do do work with rare earth magnets before, but never really had a reason until now. I’ve attached metal items to wood before, and had good luck with silicone adhesive and poly glue. But I’ve tried both the silicone and the poly, and neither seems to stick to the magnets. I haven’t tried epoxy yet. What do you guys use?

-- http://www.peteroxley.com -- http://north40studios.etsy.com --


8 replies so far

View Ryan Shervill's profile

Ryan Shervill

278 posts in 2447 days


#1 posted 2392 days ago

I use a lot of magnets…in fact, just in the last ten minutes I’ve installed 16 of them, from 1/8” X 1/8” up to 1” X 1/8” for a jig series I’m doing for Canadian Home Workshop magazine. Not knowing what your sizes and applications are, i’ll give you both methods:

1: Small magnets (3/8” or smaller) Clean the magnets well with a solvent. I like brake cleaner, but mineral spirits or alcohol will work.
rough up the glued side slightly with 220 grit paper, and glue in place with 5 minute epoxy.

2: If you are using the larger magnets (1/2” – 1”), because of their strength, the best method is to secure a like-sized washer to the wood with a screw that sits flush with the surface of the washer, apply some epoxy to the washer, and stick the magnet in place (treating the magnet the same with the solvednt/paper).
This will hold pretty much forever, and backing the magnets with steel actually increases their strength as well.

Hope this helps.

Ryan

-- Want to see me completely transform a house? Look here: http://forum.canadianwoodworking.com/showthread.php?41055

View GaryK's profile

GaryK

10262 posts in 2623 days


#2 posted 2392 days ago

I agree with Ryan.

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

View rikkor's profile

rikkor

11295 posts in 2509 days


#3 posted 2392 days ago

Thanks Ryan for the “how-to”. I have some 3/4” by 1/8” that are really aggressive. I’ll be using your advice.

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Recycler

40 posts in 2399 days


#4 posted 2392 days ago

I’d never thought of the washer+epoxy approach—only one or the other. Nice tip.

View Harry72's profile

Harry72

53 posts in 2401 days


#5 posted 2392 days ago

Cool tip on the washer!
Thx mate.

View Peter Oxley's profile

Peter Oxley

1426 posts in 2509 days


#6 posted 2392 days ago

Thanks for the great advice, Ryan! I’ll give it a try again today.

For some reason, I always try new techniques on gifts. Most gifts have a very specific deadline, and when the new technique doesn’t work as planned, then I’m in trouble! Fortunately I still have a couple of days!

-- http://www.peteroxley.com -- http://north40studios.etsy.com --

View Thos. Angle's profile

Thos. Angle

4435 posts in 2597 days


#7 posted 2392 days ago

I’ve been insetting them and using 2P-10 to hold them. Seems to work so far. I like Ryan’s method as well.

-- Thos. Angle, Jordan Valley, Oregon

View Jim Crockett (USN Retired)'s profile

Jim Crockett (USN Retired)

852 posts in 2368 days


#8 posted 2367 days ago

Another method is to use the cups available for most sizes of the disk magnets. It increases the power of the magnet considerable and give you a metal-to-metal glue surface. The cup can be inset into a correct sized hole drilled with a fostner bit or surface mounted. I think that Rockler sells the cups, if not you can get magnets and hardware at http://www.kjmagnetics.com/categories.asp?cat=86.

JimC

-- A veteran is someone who, at one point in his/her life, wrote a blank check made payable to "The United States of America," for an amount of "up to and including his/her life".

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