I am of the opinion (just one man’s opinion, mind you) that you will feel the vibration’s effects well before you do any damage to your hands.
I used a hammer drill (bad vibrations—only The Beach Boys made Good Vibrations) to break up the floor tile in a bathroom I was remodeling. After about 5 minutes I stopped and felt a numbness in my hands. I thought, “This is not good”.
I switched to a cold chisel and a hammer (slow and tedious). I ended up going back and forth between the chisel and the hammer drill.
I suffered no permanent damage.
I suspect that the low frequency, high amplitude vibrations are not worrisome in moderation. I used to ride a racing bicycle for several hours at a time, and I got the same numbness in my hands from that, though that too was transitory.
Good Vibrations:
A jack hammer, on the other hand produces bad vibrations. I knew a guy that used one daily on his construction job. He’d go drinking and he would have to go to the restroom two or three times per bottle of beer. The vibrations trashed his bladder.
Bad Vibrations: