[pianotech] Impact driver advantage

[Ron Nossaman]

On 9/30/2011 1:11 PM, David Boyce wrote:
> What's the secret of the impact driver's success then? Is it that high
> torque is applied very suddenly, breaking any bonds before the blade can
> even slip out of the slot?

I think so. And where a driver blade will walk out of a screw slot under 
constant pressure while you turn it, it doesn't with impact. It seems 
the blade reseats between impacts.
Ron N