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Sep 21, 2019, 02:51 AM
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holding magnets without glue?


what motors have you seen that use a metal ring like this or any other way to hold the magnets at both ends instead of glue?
Last edited by Hummina; Sep 21, 2019 at 04:43 PM.
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Oct 14, 2019, 03:13 PM
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Glue is cheap. simple, no hitech tools or jigs, very easy to visually check if done right. For the toy / hobby world. It meets a lot of cost conditions.
Oct 16, 2019, 05:19 PM
sneu's Avatar
Quote:
Originally Posted by Hummina
what motors have you seen that use a metal ring like this or any other way to hold the magnets at both ends instead of glue?
Neo magnets are brittle and fracture easily---they needed to be retained over the entire length---glue does that.

Steve
Oct 16, 2019, 07:42 PM
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vollrathd's Avatar
Many years ago, I purchased a brushless motor kit that was good for around 300 Watts. The magnets had to be glued into the "Bell" housing. I used the old trick with baking soda and thin CA for holding those magnets.

First, the magnets were tacked in with thin CA, then the area between the magnets were filled level with the baking soda and hit with thin CA. Permant, those those magnets never did come loose.
Last edited by vollrathd; Oct 16, 2019 at 10:53 PM.
Oct 16, 2019, 09:46 PM
If it flies, I can crash it.
rocketsled666's Avatar
Also, mechanical retention will fret and wear from vibration, loosening up over time. Glue is much more robust.
Oct 17, 2019, 01:58 AM
Registered User
Hi,
yes magnets can hold by mechanical systems. The easy way is to drill a hole and screw the magnet with non magnetig screw like stainless steel or plastic screw or fiber rod or any other way . For higher power motors we do some patents to hold magnets in place , see the sampling paper, https://worldwide.espacenet.com/publ...C&locale=de_EP , the mosaik show how. But as rocketsled666 wrote the magnets are allways forced by the high magnetic force and this will lose the best mechanical way , so we also ad some softer glue like two compound silicon glue or similar softer epoxy glue. This makes it all moore stiff but let all do some micro moving , but all fixed on place. Hope it helps. Ad a photo of a magnet with screw hole to fix.

Happy Amps Christian


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