"Ned Simmons" wrote in message
...
In article ,
says...

"Ned Simmons" wrote in message
...



I think it has to do with the fact that the ring with the teeth is not
a
perfect fit on the chuck body. Tightening the chuck tends to cock the
ring a bit so it doesn't turn as freely. Moving the key to a different
hole pushes on a different point on the ring and frees it up.

Ned Simmons


You are on the right track. The fit between the chuck and scroll can
wear
with use.

I was talking about a Jacobs type drill chuck, which I think was the
subject of the original post, not a lathe chuck.

Ned Simmons

Different chucks, same problems, however.

Harold