|Synonyms:||bell saws, hole cutter bits; DE: Lochsägen,|
Kreisbohrer, Dosenbohrer, Bohrkronen,
|Material:||depends on type (wood, concrete or even metals)|
|Access Requirements:||upon reading|
Hole saws are drill bits that consist of a saw blade holder and a central pilot drill bit which determines the position of the hole. Often, interchangeable saw blades are locked on the holder one at a time.
If you need guidance without the pilot drill bit (e.g. when cutting around a hole that is already larger than the pilot drill bit, or if you need discs without a hole), try clamping a template cut with the same hole saw on top of your workpiece. 
We currently have a set of wood hole saws that can cut 44 mm deep and 26, 32, 39, 45, 51, 58 or 64 mm in diameter.
There is significant kickback when (mis-)using this tool, take the time do it right!
Put only a single saw blade into the holder when you want to use it!
Use a drill at relatively high speed but little pressure.
|26 - 39 mm||1200|
|45 - 58 mm||1000|
No hammering drill can be used to saw holes.
Besides keeping the saws intact, please take personal safety precautions and wear safety goggles!
2018-3: the screw broke out of the aluminum blade holder - fixed by drilling/tapping a new hole opposite of it