Magnetic or vacuum hold down clamp??


I'm looking for something that may not exist. I have a cast iron sliding table and I believe it would be a lot more useful with some type of magnetic or vacuum base hold down clamps. This type of clamp would simply attach to the sliding table and use a screw or toggle type clamp to hold the wood in place. Has anyone seen such a thing or have any suggestions for a base on which I could add my own clamps?
Bob
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You can make a heck of a clamp with these...
http://cgi.ebay.com/Neodymium-Magnet-3-x-3-N48-Cylinder-HUGE-STRONG_W0QQitemZ7555036657QQcategoryZ53142QQrdZ1QQcmdZViewItem
BillyBob wrote:

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BillyBob (in VdB7f.1851$ snipped-for-privacy@newsread2.news.pas.earthlink.net) said:
| I'm looking for something that may not exist. I have a cast iron | sliding table and I believe it would be a lot more useful with some | type of magnetic or vacuum base hold down clamps. This type of | clamp would simply attach to the sliding table and use a screw or | toggle type clamp to hold the wood in place. Has anyone seen such a | thing or have any suggestions for a base on which I could add my | own clamps? | | Bob
Bob...
If you'd like to try a vacuum base, you can make it with a block of plastic and a bit of weatherstripping. A recycled refrigerator compressor works well as a vacuum pump. You might get a few ideas from http://www.iedu.com/DeSoto/assembly.html . I'd suggest at least 15 sq in or so for secure attachment.
-- Morris Dovey DeSoto Solar DeSoto, Iowa USA http://www.iedu.com/DeSoto/solar.html
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Morris Dovey (in UBC7f.88$ snipped-for-privacy@news.uswest.net) said:
| BillyBob (in VdB7f.1851$ snipped-for-privacy@newsread2.news.pas.earthlink.net) | said: | || I'm looking for something that may not exist. I have a cast iron || sliding table and I believe it would be a lot more useful with some || type of magnetic or vacuum base hold down clamps. This type of || clamp would simply attach to the sliding table and use a screw or || toggle type clamp to hold the wood in place. Has anyone seen such a || thing or have any suggestions for a base on which I could add my || own clamps? || || Bob | | Bob... | | If you'd like to try a vacuum base, you can make it with a block of | plastic and a bit of weatherstripping. A recycled refrigerator | compressor works well as a vacuum pump. You might get a few ideas | from http://www.iedu.com/DeSoto/assembly.html . I'd suggest at least | 15 sq in or so for secure attachment.
Photo of shop-made vacuum base on ABPW. I like the magnetic base idea even better.
-- Morris Dovey DeSoto Solar DeSoto, Iowa USA http://www.iedu.com/DeSoto/solar.html
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Magnetic clamps are commonly used for milling. Check out the metalworking suppliers.
BillyBob wrote:

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Thanks for tickling my brain, Mike. I looked at McMaster-Carr and found something that may be the start of a something that will work well. Its called a magnetic base - a plain old magnet block with a threaded hole and a switch to release it. It should be pretty easy to add a standard hold down or toggle clamp to this. Their economy version is claimed to have 160 lb pull and is only $13. If it works out, I'll order some more and post pictures.
Bob
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