ᐅ Remove roller shutter mounting brackets and shaft supports in an older building

Hello housebuilding enthusiasts,

My current project involves converting the roller shutters to electric drives (older building from around 1962). The old bearing shells are mortared into the masonry. Most of the shutters already run on ball bearings (40mm (1.6 inches)), so I only need a new mount on the motor side. Unfortunately, some shutters are not ball-bearing mounted, so I will probably have to work on both sides there.

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

The first picture shows a bearing shell. The other two pictures are the "bearing-less" shaft mounts on the right and left sides.

Many thanks and best regards,
Andreas

I have now removed everything. The brackets were embedded about 8-9cm (3-4 inches) deep in the masonry. The removal went fairly well by directly applying the demolition hammer from below against the bracket until it was loose enough to be pulled out. I hope this post helps someone.

Best regards,
Andreas