Sticky mag chuck ideas?

Drop it into a 5 gallon can of kerosene or diesel fuel for a week.

Gunner

Rule #35 "That which does not kill you, has made a huge tactical error"

Was it a water soluble cutting fluid? If so it won't dissolve with oil. Use hot water, hot as will run from the tap. Blow it out, WD40 the heck out of it, then use hot air to dry, more WD40, more hot air, then oil the heck out of it.

Any covers that can be removed for access to the innards, without having the magnets removed from their position?

Cheers Trevor Jones

BTDT. In fact I just brought home a surface grinder. It and the mag chuck have the same problem you mention.

It sometimes takes more than one treatment. I start with engine degreaser. I call it the purple stuff, cause its made by several outfits but always purple. Spray it on with a squirt bottle, soak, repeat. Then I use a hot pressure washer to blow it all off. For something small like you got, stick it in a laundry tub and go at it with a brush and soap. Dry it off right away. Spray on WD-40 or something to prevent rusting right after that.

This gets 99% plus of all crud. For the rest, go to a solvent. I see you already have two fellas recommending that.

Karl

Careful with the purple stuff, if it's the same stuff that the chain car parts places sell in gallons, it WILL eat aluminum and can mark up chrome plate. Great for degreasing non-metallic stuff, though.

Stan

The way these work is the top is a bunch of steel and something non-magnetic like aluminum or nonmag-stainless laminations. Below that is a movable piece with alternating thin magnets and steel laminations. When the steel laminations of both parts line up, the chuck is "on". If there is a way to pull this magnet assembly out the side of the chuck, you can slide it out onto a keeper of ordinary steel while you work on it. Also, it may be possible that a non-magnetic bottom cover can be removed and replaced with steel, and that would then act as the magnet keeper. If there are removable covers, you should be able to take those off safely for access and inspection. You won't be able to separate the magnet from the chuck except by a sliding action, the attraction force is enormous.

Jon

Thanks for the replies, guys. Perhaps I just need to work at it a bit longer. There are no apparent plates that can be removed, with the exception of the one warning you not to remove it, which is on the bottom. I am not sure if the grinding stuff is water or oil based, good thought, I'll have to check into that.

I am hoping to get some time in on this this weekend, I'll let youu know how it works out.

-AL A.

Top is a "core" ( conducts magnetic flux) . Like the flat bar across a childs horseshoe M' . This core completes the mag "path"

If you use another piece of iron , on the bottom against the magnet , then apply a big pull .....

you will be able to take the pressure off , allowing slide to happen much easier ....

------------------------- Different width magnets are for smaller work . Say 1/4" and 3/8" alternating ... If same , then its for bigger work pieces ..

In some machining , they are the only way !

I want one , but HF looks bad ....

According to Al A. :

Can you scrape off some of it, and test it in different solvents? That could reduce the number of things which you will have to try on the final product.

Good Luck, DoN.