MadModder
Gallery, Projects and General => How do I?? => Topic started by: paulmo101 on June 03, 2017, 12:51:41 PM
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Hi
Still gathering information for my tacho project and I`m wondering what is the best adhesive to stick the magnet (trigger) to a shaft? The shaft will be in the headstock of my lathe so I wouldn`t want the magnet to come adrift when the lathe is turning I was considering 2 part epoxy, bearing retainer, chemical metal any other suggestions welcome. I was also going to cover the magnet with a strong (gorilla tape) duck type tape wrapped around the shaft and back onto its self as a belt and braces approach.
Thanks for reading
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Bill Smith IC-2000 might be a good choice
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Hi Ed
thanks for the reply - never heard of it but I will have a google
Cheers
Paul
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I just popped mine on the shaft letting physics do the holding, I've not had a problem and have run it above 2000rpm.
It depends on the diameter of the shaft. At a guess it's it's around 2-1/4" on my Boxford.
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3M VHB tape is what I would use. You can always apply a broad elastic band on top as belt and braces. A condom with the end cut off applied over the shaft and magnet (no pun intended) several times would do the job.
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Permabond have an article on the subject here http://www.permabond.com/2015/12/06/magnet-bonding-adhesives/
There adhesives can be purchased from glueonline.co.uk - no connection to either company
The taco magnet on the shift of my mill is just stuck on with magnetism, has been OK up to 1800rpm
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I just popped mine on the shaft letting physics do the holding, I've not had a problem and have run it above 2000rpm.
It depends on the diameter of the shaft. At a guess it's it's around 2-1/4" on my Boxford.
I have not used adhesive on my neo magnets BUT mine are on a flange on the outter side of the spidle AND max rpm is maybe 800 rpm.
But this adhesive just saved me when a tube blew on my front tractor tire, I patched the tube mounted the tire and the tube leaked at the stem, removed the air put the ic-2000 on the crack and accelerator no leek and will fix later. Stronger than super glue types but high build up and some flexibility. AMAZON about $9/oz. ic-2000 rubber-toughened 1oz ca adhesive glue
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I think it depends on the size of the magnet mine is small 6mm X 1.5mm , no adesive used it hase stayed on for over two years .
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Thanks for the great replies - plenty of good ideas.
Will probably upgrade the magnet that they supply with a neodymium magnet so mybe okay on its own or just with tape over
Thanks Again for the replies
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Hi Paul, Mick did a something simular to his Harrison lathe. Project Harrison L5 rescue. http://madmodder.net/index.php/topic,7321.200.html
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thanks for link project looks great
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Glad to be of some help. :thumbup: