Drilling a hole deeper than the holesaw depth

as an aside
assuming its a hole saw that fits to auger[drill bit]

drill to 75% off cutter depth
remove part off the core waste
then you can drill deeper until the chuck or drill body limit the depth

ooops sorry you are doing this :oops:

OP this is generally how it's done that's why you don't see holesaws that are 100+mm in depth, as bigall says you drill some depth, remove waste and repeat. Once you've penetrated through the timber once that will act as a guide. I would think the logical reason for not having massively thick holesaws is because you would get a lot of friction on the shaft as nobody can hold a drill perfectly straight for the duration of a cut. This principle is illustrated perfectly if you have ever tried diamond drilling solid material, the blade does not like being ****ed with while it's doing it's think
 
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