In a message dated 22/02/2006 21:44:30 , cbrumbelow@xxxxxxxxxxx writes: Dumb question 1 -- Is it actually Electromagnetic and, if so, did you get the power source (controller) and try it with that? [Actually several questions here...] Dumb question 2 -- If it is not electromagnetic, did you turn the knob which is supposed to activate and deactivate it? Observation 1 -- If it is not electromagnetic and you disassemble it without a proper "keeper" between the poles, the magnets will lose much of their strength, just like the old two-pole motors for HO/OO trains. Charles -------------- Original message -------------- From: Donkitson1@xxxxxxx > Hi Guy's, > I have recently obtained a small surface grinder, and along with it came > a Magnetic Chuck. However it would appear that it has lost it's magnetism, a > label on the chuck says this chuck will not lose its magnetism unless it is > disassembled, please return to manufacturers for maintenance. > Question, has any one on the list any experience on this sort of thing and > if so what should I look out for if I strip it to try and sort it so that it is > usable again.?. > It is very heavy, I would estimate about 50lbs or more. > Any help appreciated. > Don in freezing East Lancashire. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. Hi Charles No it is not the electromagnetic type it is similar to the eclipse type of magnetic chuck. I did push the lever over several times to no avail. tommorow when I am in the workshop I will check to make absolutely sure it is going all the way and not being obstructed by anything. Don MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.