Just got my first keyless chuck drill and I am having
problems......bought a new bosch 550 wired drill to replace my old black
and decker and Stanley drills and a 20mm masonry drill to open up the
holes in a teracotta airbrick.....anyway got the bit tightened and
started drilling on the hammer settings and after a few seconds the
drill fell out and rolled down the roof to the ground......this can't be
normal... am I doing something wrong?....instructions just say tighten
until clicks are heard......doesn't matter how tight I make it the drill
still falls out....any ideas ? ...