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
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
