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Dial Gauge

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WALLACE29/10/2010 14:25:02
304 forum posts
17 photos
I'm not sure about the magnet from a magnotron - they're so powerful, you might not be able to shift it afterwards  !
 
 
W
wheeltapper29/10/2010 15:48:50
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424 forum posts
98 photos
magnetron magnets aren't that powerful, I got a pair of neodym ( I think thats how its spelt) magnets from a hard drive, only 30mm x 10mm x 2mm thick, I practically need a block and tackle to separate them.
 
Roy
Andrew Johnston29/10/2010 16:21:46
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7061 forum posts
719 photos
I suspect your magnets are based on neodymium.
 
Regards,
 
Andrew
wheeltapper29/10/2010 17:15:21
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424 forum posts
98 photos
yea, that's the animal.
 
nearly got it right,
 
whatever, the're b****y powerful.
Roy
Andrew Johnston29/10/2010 17:26:00
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7061 forum posts
719 photos
They certainly are! I've played with a few after taking hard drives apart. I might be paranoid about giving away private data, but before I scrap a hard disk I dismantle it, remove the disks, hacksaw them into quarters and then knock hell out of the quarters with a hammer. Nobody is going to recover data from them after that.
 
Regards,
 
Andrew
Nicholas Farr29/10/2010 17:39:07
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3988 forum posts
1799 photos
Hi Andrew, I saw on the tele the other night, someone is making jewellery out of bits of hard drives, and other electronic componets. Perhaps tou could sell them some hammer finished earings or something.
 
Regards Nick.
wheeltapper29/10/2010 17:55:26
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424 forum posts
98 photos
I got three disks from my drive and they are next to me now, just sitting there , defying me to find a use for them.
 
Sorry Wolfie, we seem to have totally hijacked your thread.
what was it about now??????????????
 
Roy
AndyB29/10/2010 18:37:27
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167 forum posts
7 photos
Hi Wheeltapper,
 
The discs from hard drives are ground to a very fine tolerance...how much did you pay for thin parallels?
 
Andy
wheeltapper29/10/2010 18:45:49
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424 forum posts
98 photos
Nothing, I haven't got any................................................or have I????
 
cheers
Roy
Ian Abbott29/10/2010 19:32:23
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279 forum posts
21 photos
The thing to watch with those magnets is not to get yer' fingers in between them if you let one go.
 
How do I know?
 
And, made some badges for gallery staff, but they didn't like pushing clips through expensive dress material, so I fitted them with magnets.  Problem was that if the badges came anywhere near credit cards it was curtains, and if the magnet was released more than a few thou. from the other, it smashed the badge. 
 
Ian 
wheeltapper29/10/2010 19:52:14
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424 forum posts
98 photos
Posted by Ian Abbott on 29/10/2010 19:32:23:
The thing to watch with those magnets is not to get yer' fingers in between them if you let one go.
 
Ian 
 
 
 I .....er...............already discovered that
 
Roy
Ian Welford29/10/2010 20:34:42
300 forum posts
If you need to make the magnet weaker but a washer or plate on it. the magnetism comes through but not as strongly.
 
Only problem I've had with them is they're brittle ( as my sons 5 & 9 have proved ) so they don't bounce!
 
In Chris's "giving thread" I put how I use one with a handle in a plastic container to remove swarf etc.
 
Axminster list rare earth magnets but these are damn powerful !
 
Wolfie
 
at a push you can use a block of wood with a hole cut to a "close fit" on the lower stem and then  put a wood dowel / stick in theside of the block and get it where you want it.. eg grip in the tool post holder and spin the chuck carefully by hand having put the foot in contact with the workpiece.
 
 The only important thing IMHO is that the thing does not move whilst you turn the chuck as it's a comparison device not an absolute measuring device. You compare readings to centralise.
 
Complicated to describe but easy to make!
 
 
Stub Mandrel29/10/2010 20:53:38
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4318 forum posts
291 photos
1 articles
Just spotted this thread.
 
Wolfie's alucky man, my raher fine vintage dial guage doesnt even have a big tab on the back for fixing! I have an ally block with hole in and a thumbscrew lock permanently fitted around the metal shaft the pointer comes out of.
 
Neil
Andrew Johnston30/10/2010 12:05:23
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7061 forum posts
719 photos
Hi Nick,
 
Good idea! I have seen earrings made from CDs, may be I should start selling ones made from disk drive platters.
 
Regards,
 
Andrew

Edited By Andrew Johnston on 30/10/2010 12:05:46

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