Thoughts On When To Dress Magnetic Chuck

[Mcgyver]

maybe its in here somewhere, but I don't remember reading where you've said you've checked the fit of the chuck to the table. If there isn't good bearing all over, then you're going to change the shape of both when you engage the magnet.

As for indicators, use a Mit anti magnetic....not sure specifically how much an Interapid is affected, but the the anti magnetic is not

[JoeLee]

Wow. I like to see tools taken care of. I dont have a grinder but do have a giant Walker chuck I could check but I dont think I have anything that wont be affected by the mag.

I dont know how to measure it powered up what i am saying. All my tools are metal.

We need granite JR

You know those things are DC right?

It's not an electro magnetic chuck.

JL.............

[JoeLee]

maybe its in here somewhere, but I don't remember reading where you've said you've checked the fit of the chuck to the table. If there isn't good bearing all over, then you're going to change the shape of both when you engage the magnet.

As for indicators, use a Mit anti magnetic....not sure specifically how much an Interapid is effected, but the the anti magnetic is not

Somewhere in one of my posts I did mention that I indicated the table before setting the chuck on it and it was almost dead flat al over. I was surprised! When I set the chuck on it it indicated almost exactly the same. I dusted the chuck off and it was perfect. That was about 20 years ago. Not lot of use since then, never used coolant so nothing has seeped under the chuck to for any corrosion that would tend to raise the chuck from the table.
So, I'm not really sure why I get a slight rise in the center of the chuck when I turn it on. I thought that my sketch of the chuck surface might help to explain this.

JL...................

[Mcgyver]

Somewhere in one of my posts I did mention that I indicated the table before setting the chuck on it and it was almost dead flat al over. I was surprised! When I set the chuck on it it indicated almost exactly the same. I dusted the chuck off and it was perfect. That was about 20 years ago. Not lot of use since then, never used coolant so nothing has seeped under the chuck to for any corrosion that would tend to raise the chuck from the table.
So, I'm not really sure why I get a slight rise in the center of the chuck when I turn it on. I thought that my sketch of the chuck surface might help to explain this.

JL...................

not indicate it, check the fit - how complete is the contact of the bearing surfaces between table and chuck. If its not fully bearing, it could change the geometry when you turn the magnet on