Use a 1/4 inch bit, that's only very slightly bigger, less than 0.025 of a mm. larger.
5 mm dia drill bit
I would use a 10 mm drill bit.
drill was broken off.
19mm thin wall.
There are a few ways of doing it depending on the exact geometry, size, and tolerance. You could drill the hole before cutting the profile that results in the partial entry. You could drill very carefully and slowly, stepping up the drill from a small size to the final size, if the smaller size would enter complete. You could make a fixture to fit over the part so the drill is guided into it. There are low melting alloys you can pour around the area to make a complete entry. You then melt the alloy away.
18mm deep THIN wall socket has to be thin wall
(trick question? find a more narrow wall.) They sell drill bit extensions - metal rod. OR measure carefully and drill from the other side. Or find a drill bit that is long enough.
Go to the next size concrete lag shield anchor or rawlplug. If this is not workable,drill the hole to 1\2 and fill with high strength morter. = =
Please explain what is a "fines wall"
a drill.
it's probably a block wall and it's solid concrete above the window and door openings try a masonry bit in your drill
No this mount does not require a studded wall, you simply have to drill one pair of holes into your wall in order to support it.
You go underground. You can use the digger drill on any wall and you will now have a secret base.
18mm thin wall socket normal socket will not work