Drilling concrete--error ot original question
a rotary hammer works differently from a hammer drill. thats why the
chuck is different to necessitate the drilling.
if you were an expensive sds bit, cut the shank and place the bit into
a hammer drill, its performance would be no where near that of a rotary
hammer using a cheap $2 bit
its in the design of the drill, sds is just the tip of an iceberg.
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