On 17 Feb 2021 at 20:26:17 GMT, ""Jimmy Stewart ...""
wrote:

On 17/02/2021 15:35, Jimmy Stewart ... wrote:
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 ? ...
went out and bought one with a chuck key .......all this modern ****e
never works .....

If you're going to drill anything reasonably hard with a 20mm masonry bit I
don't think this will work with any hammer drill, unless perhaps you start at
8mm and use every even size to progressively enlarge the hole. It is worth
investing in a seat of cheap SDS masonry bis and a cheap SDS drill if you are
going to need that size hole more than a few times. They have both in cheap
no-name versions on Ebay and perhaps Amazon.

--
Roger Hayter