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26th April 2014, 05:38 PM #1
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Who uses a magnetic chuck on their mill?
Hi all,
Been surfing ebay and a magnetic chuck popped into view. It prompted a question to myself, can you use them for work holding on a mill? There have been occasions where such an item would have been handy when milling very low profile items. I understand that grinding forces generated on a surface grinder would be a fraction of that on a mill but, the question is:
For very light DOC's on an item with a large surface area (clamping area) is it an accepted method of work holding on a mill?
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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26th April 2014, 05:50 PM #2
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Hi Simon,
Run of the mill ( pardon the pun) Mag chucks don't really have sufficient holding force for milling, they are more suited to grinding. You might get away with light cuts?
There are however some that are made especially for milling, but I think they are mostly electro-magnet types rather than permanent magnet types.
Ray
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26th April 2014, 06:57 PM #3
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I have tried it, for the lightest of cuts using HSS it works sometimes.... Most of the time it fails..
Light red, the colour of choice for the discerning man.
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26th April 2014, 07:03 PM #4
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Think back to the thread on the sheet metal press brake with electro-magnetic clamping. Another job to add to the list?
Dean
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26th April 2014, 08:59 PM #5
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Can work well if your gentle.
Fantastic if they adjustable for tapers.
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26th April 2014, 09:28 PM #6
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I would only attempt it if you could resthe part agains at least one stop fence (strip bolted to edge of magnetic chuck just sticking up above the surface but below the depth of the cut.
Cheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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26th April 2014, 09:35 PM #7
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I thought I would this response! I was looking for an excuse to buy one and thought it may be an easy way out of making some low profile clamps which I really need to do!
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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26th April 2014, 09:38 PM #8
Philomath in training
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Simon, if you really want to hold thin parts on a mill, make up a vacuum table.
vacuum.jpg
(Way cooler than low profile clamps)
Michael
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28th April 2014, 12:00 PM #9
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Hi michael. That looks interesting. I may have to do some research on that. Be interested to know if there is a minimum surface area requied to hold a piece down. Also the top would have to be made fairly precisely, as in be parallel to the mill table.
Simon
Sent from my GT-I9195T using TapatalkGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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28th April 2014, 01:35 PM #10
Philomath in training
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Pressure = force/ area.
Therefore force (downward) = pressure (atmospheric - vacuum) x part area.
The bigger surface area on the part the harder it will stick
Michael
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