ok...a short diatribe on grinder guards.i'll start by saying to martin-i really appreciate your input on this thread.and appreciate your concern for my safety.
now,i spent the better part of twenty years in the metal fab trade,and happened to have this discussion with the workers compensation board.the ruling was that any guard on a machine that hindered it's normal use was a hazard in itself.they looked at how we were using grinders as cutting tools,sanding tools,wire brushes,as well as face surface grinders.it was determined that the only appropriate use of the supplied guard was with surface grinding.in all other uses it hindered operation in a way that made the tool more dangerous.
a certain amount of skill and training were assumed to be had by the operator of the tool,and responsibility for how it was used(never-ever use a cutoff wheel with the grinder pushing-always make sure that the rotation is pulling the grinder.never get any part of your body in the plane of rotation of the disk.always keep a firm and controlled hold on the tool)i'm amased by how often i see the first of these rules broken on t.v.-it makes me cringe just watching it,knowing how the grinder can push and bind without any warning,and have the disk break up throwing bits around at high velocity.
so i guess what it saying is that the guards on a machine are not as important as keeping in mind the possible ways that the machine could hurt you....all the time you are using it,without fail.as i've said before in this thread when i had a close call with a piece of equipment,it's the one time you are not paying attention to the danger that something gets you.
there...done.