After you have checked on the other things that have been posted, try a
thicker blade - that will push the frog back and give you back your range of
adjustment. I put a 1/8" thick blade in my #7 and had to open the mouth to
get clearance but it sure works well.
Craig

"Tom Banes" wrote in message
...
Tightening up the mouths on both a #3 and #5 Stanley. Want the #3 at
about .020 and the #5 at about .125. In both cases the frog adjusting
screw bottoms out befoe I get the mouths that tight, with just a hint
of iron below the sole. So I just took the screws out and moved the
frogs forward manually. That worked fine, but it would be nice to use
the screws for more precise adjustment.