Remove storage shells/shaft bearings of old building roller shutters

Hello dear house building friends,

my current project is the conversion of the roller shutters to electric drives (old building approx. 1962). The old bearing shells are mortar-set in the masonry. Most roller shutters already run on ball bearings (40mm), so I only need a new mount on the motor side. Unfortunately, some roller shutters are not ball-bearing mounted, so I probably have to work on both sides here.

My question is, does anyone know these old (bearing) shells and how deep they extend into the masonry? Is it better to chip them out or simply cut them off and mount the new holder in front?

The first picture shows a bearing shell. The other two pictures are the "bearing-free" axle mounts on the right and left, respectively.




Many thanks and best regards,
Andreas

I have now removed everything. The brackets were about 8-9 cm deep in the masonry. The removal went relatively well by directly applying the demolition hammer from below against the bracket until they were loose enough to be pulled out afterwards. I hope this post helps one or the other.



Best regards,
Andreas