Drill hole in Lecamur for radiator pipes

[FreQa]

I need to prepare the team coming to perform the conversion from electric heaters to water-based ones. I will need to make several holes in a wall of Lecablock for the insulated radiator pipes.

Which type of hole saw is most suitable:

diamond drill like this one

Or better with this one

Drill with one of these and knock out, then continue to drill deeper.

 

[richardtenggren]

I used the lower one when preparing for geothermal heating when we made the slab for the extension outside the boiler room wall (pipes under the slab to install pipes afterward). I used the 114 mm variant and it went well, our blocks are probably 25 cm, so I had to do it in stages. I came up with a quick fix to extend the shaft, using a 3/8 extension and socket to get through the wall.

 

[FreQa]

I used the lower one when preparing for geothermal heating when we made the slab for the extension outside the boiler room wall (pipes under the slab to insert pipes afterward). Used the 114 mm variant and it worked well, our blocks are probably 25 cm, so had to do it in stages. Came up with a makeshift solution to extend the shaft, used a 3/8 extender and socket to get through the wall.

Yes, an extender is necessary, I thought so too. I think ours are only 190 mm.

 

[FreQa]

I used the lower one when I was preparing for geothermal heating when we made the slab for the extension outside the boiler room wall (pipes under the slab to insert pipes afterwards). I went with the 114 mm variant and it worked well, our blocks are probably 25 cm, so I had to do it in stages. Came up with a makeshift solution to extend the shaft, used a 3/8 extender and socket to get through the wall.

In my naivety, I thought the extenders hanging next to it at Jula would fit, they did with a visual assessment at least.
Once home I measure 12 mm on the hole saw and 11 mm on the extender!
Is there another way to solve it?

 

[richardtenggren]

Aha, I took an extension and a 12 mm socket and put it in the screwdriver, worked well for me You might have misunderstood my previous post, but realized that I was probably using 1/4” tools.