turnerted
6th March 2008, 04:37 PM
Hi
This may prove of interest to someone .
Today I went to remove the longnose jaws from my Vicmarc 120 chuck and found I could not remove one of the screws . Of course it had to be one deep in the recess .I spent about half an hour struggling with it . I had the chuck on the lathe and the indexing pin in to lock it and was putting so much preasure on it I was expecting the T bar allan key to break . Eventually the key would slip out of the screw hole . I squirted WD40 in the hole and went and had a cup of tea . Came back and still no joy so I rang Vicmarc for advice . Their suggestion was to put a pin punch down the hole and give the screw a thump and the shock should loosen it .Well I don't have a pin punch but I do have a brass knockout rod which was just the right size so I sat the chuck on the bench , put the rod in the hole and and gave a good thump with a lump hammer . I put the chuck back on the lathe , put the allan key back in ,gritted my teeth and applied preasure . I heard a click and joy o joy it came free . No damage except a slight burring of the allan screw and I have a couple of spares of those .I learn something new every day.
It is my nomal practice to just nip up the screws when I change jaws but I have noticed on other occasions when I go to remove them that they are abnormally tight . Any suggestions how to prevent this ?
Ted
This may prove of interest to someone .
Today I went to remove the longnose jaws from my Vicmarc 120 chuck and found I could not remove one of the screws . Of course it had to be one deep in the recess .I spent about half an hour struggling with it . I had the chuck on the lathe and the indexing pin in to lock it and was putting so much preasure on it I was expecting the T bar allan key to break . Eventually the key would slip out of the screw hole . I squirted WD40 in the hole and went and had a cup of tea . Came back and still no joy so I rang Vicmarc for advice . Their suggestion was to put a pin punch down the hole and give the screw a thump and the shock should loosen it .Well I don't have a pin punch but I do have a brass knockout rod which was just the right size so I sat the chuck on the bench , put the rod in the hole and and gave a good thump with a lump hammer . I put the chuck back on the lathe , put the allan key back in ,gritted my teeth and applied preasure . I heard a click and joy o joy it came free . No damage except a slight burring of the allan screw and I have a couple of spares of those .I learn something new every day.
It is my nomal practice to just nip up the screws when I change jaws but I have noticed on other occasions when I go to remove them that they are abnormally tight . Any suggestions how to prevent this ?
Ted