But I am told that hand pieces generate more gold losses than the
traditional drills. Is that True? If yes, then why use the flex
shafts for drilling
I've never heard this sentiment expressed before, but if I had to
guess why it may have been made it's this.
When using a hand drill, the drill is rotated at a rather slow speed
(compared to the flexshaft). This results in the gold that's removed
from the hole staying very close to the drill bit. In this position
it's easy to recover & save for refining.
On the other hand, the drill bit turned by the flexshaft will
probably be turning at a much higher rate of speed. This higher
speed will probably cause the gold removed from the hole to be
thrown farther from the hole. This could make it harder to recover
However, if the area used for drilling is set up correctly, the
gold that's thrown from the drill will fall in a 'catch pan' &
while it's not around the hole or drill bit, it's not lost.
Drilling a hole with a manually operated or a powered drill will
always leave a hole the same size if the same drill bit is used.