Magnetic Chuck - Testing and Troubleshooting Questions

Ray C said:
Since yours is a little different, I'd have to see it. Look in there with a flashlight. Admittedly, the first time I did this, it had me scratching my head but once you've done it, the rest are a snap.

Was it filled with gunky oil?

Ray
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I have not had much luck shining light into the area with the actuator. I can't get that end lifted up much to let me see in. It was filled with oil, but not too gunky. I suspect the chuck was used for dry grinding all of its life.
 
Well, how's it going? Did wiggling sideways help. On the ones I did, you have to lift slightly and move it sideways. I see that the magnets on your are aligned the same way as all the ones I've done. Yours has a slightly different actuating mechanism no-doubt. Anyhow whatever you do, forceful prying is probably not the answer.


Ray

EDIT: The base looks like aluminum -fortunately for you! One of my 6x18's has a CI base and it weighs 75lbs. -Real fun getting it apart as I recall...
 
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No dice. I never forced it hard enough to bend anything inside (hopefully). The wiggling sounded like it had potential, but that didn't seem to loosen anything up. I tried putting a long wood clamp on it and putting a little longitudinal pressure on it, but that didn't do anything. I didn't see any set screws in the actuator hub that might release the top to slide a little farther. I didn't go over it carefully to see if there was a taper pin holding it on that was well hidden though.
 
Ray C said:
Look in there with a flashlight. Admittedly, the first time I did this, it had me scratching my head but once you've done it, the rest are a snap.
Ray
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I was able to wiggle it apart enough at the actuator end to get a look. The actuator is a coarse screw - probably a multiple thread screw - that just pushes and pulls the magnet pack back and forth. What I thought was just an oil fill plug at the opposite end is a pair of back to back set screws that apparently keep the magnet pack from going too far toward the opposite end when the magnet is turned on. It must be for aligning the magnets with the top for maximum strength. The strategy seems to be to turn the actuator in the on position, which unscrews the pack from the screw. The problem is that it hits the opposite wall before it's fully disengaged. Even lifting it up a little hoping to guide it out of the bottom doesn't seem to be doing it.
 
kd4gij said:
there must be a lock ring on the screw then.
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Where would I find it? I don't think it would be inside the case because I don't think there's a way to reach it in there. There is what appears to be a narrow spring steel shim beneath the head of the actuator, but I can't see any break in it to allow it to open and let the actuator slide out or into the case.
 
Definitely sounds like a slightly different configuration than the ones I've worked that had the lever on the side. I wish we lived nearby. I'm intrigued.
 
Ray--I enjoyed this forum and I have a question for you. are all walker 6x18 manual chucks filled with oil? I rebuilt mine and it had no oil in it at all. I had to design and make the shaft and cam pieces by myself because I didn't know any specs for them--well I finally got them made and used grease on all moving parts and put it back together. It works good finally but will not having oil in it bother it later? it was quite an ordeal of assembly/disassemblys untill I got the cam made to lift inner end of magnet and slide it just enough to line up without hitting end. I don't want to take it apart again unless it quits working. Dave
 
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