How do you attach a 3-jaw chuck to a mill's table?

Usually I drill and tap for a setscrew in the hub area of the back plate, a short piece of brass rod placed underneath the setscrew will keep it from galling the spindle threads.

"PrecisionmachinisT" wrote

I've done that to fix the dials on an Enco milling machine. The separate plug didn't work so well for things that come apart. Even if I don't lose it, it doesn't go back in the same way.

I had better results with a piece of hard solder under the setscrew, which squishes out and locks itself into the threads so it stays in place, but it doesn't completely release and the assembly is somewhat difficult to unscrew.

jsw

mill's table with three T-slots?

Three bolts through recessed holes in the plate.

table with three T-slots?

Mount it to a bit of steel..then mount the backing plate to the t slots

this assumes that you are mounting it face up....

Gunner

"The best government is a benevolent tyranny tempered by an occasional assassination." --Voltaire

Ayup..that works too.

Gunner

"The best government is a benevolent tyranny tempered by an occasional assassination." --Voltaire

Pretty careful. Tighten it up too loosely..and it will start to spin. Tighten it up too much and it gets to be a pain in the ass to get it off.

Now..if if you can find a 4degree Camlock chuck..thats very easy to set up. Which is what Ive done. So I can use the chucks from the Hardinge lathe on the mill. But then..I do have a half dozen 5C vises..that hold a 5 C collet and allow you to put in the work and open and close it with a lever.

This works Great for stuff under 1 1/16" inch or with expanded 5cs for some bigger flat stuff

etc etc. That stuff goes for very very little money if one finds it used.

Hell..Ill bet Iggy has a number of them already, he could sell cheaply.

Then too...if anyone can live with 5" of height...one can use one of these to hold a chuck..the necks are threaded

See the black ring at the left end of the fixture..where the collet goes? That spins off and it will screw into many chuck backs.. I cant remember the thread pitch..shrug

Gunner

Gunner

"The best government is a benevolent tyranny tempered by an occasional assassination." --Voltaire