Sometimes it just happens that way...unless two had some thread lock or other compounds on....Ive had a few with thread lock.
On really stubborn screws drill the head off if they wont come out.... Ive had to resort to that method only once in 15 or so dissassemblies.
If you have a suitable impact driver, which can be set to reverse so you are not just tightening the left hand thread machine screws, that should do it. Otherwise you can try drilling them out. Since your right hand drill is opposed to the left hand screw in the chuck this should get it out quickly.
Did try drilling. Just bored the end of the bolt off.
I just finished taking the chucks off all the drills and I had to use the angle grinder for both.
Managed to save one of the two stuck bolts with some skillfull grinding.
I would say thats the best method if you have to use force. Grind the top bit off the chuck. Cut off the plastic bits. Then gind down around the bolt and try to loosen it. Drilling could just damage the end of the bolt.
Did try drilling. Just bored the end of the bolt off.
Yup that was the general idea.
You then unscrew the chuck and purchase / find a new l.h. screw.
The plan in my head was to drill slowly and get some purches and unscrew the bolt out. But didnt work.
I just have to remember where I put all my L.H. screws. Havnt used them in a bot for around a year. I hope I have not given them away :S
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