"Bruce L. Bergman" wrote in message
...
On Sat, 23 Feb 2008 06:12:46 -0800 (PST), mark
wrote:

I bought what is apparently the most powerful 1/2" drive impact wrench
available IR 2135 with 1000 ftlb or torque and am still finding it
weak. The other day it would not remove the bolts that hold on my
front brake caliper bracket and sometimes it wll not remove lugnuts. I
am using it at 125psi with 50' of 3/8" hose and 1/4" M (milton) quick
connects). Would going to 3/8" qc fittings help at all? I notived a
local tire shop has the air pressure at 150 psi. Is this what is
needed? How come air tools say never to go above 90 psi?


If you can't do this, consider a 5-gallon or better receiver tank as
an accumulator right next to the workplace and the impact wrench - put
the biggest hose you can from the wrench to the accumulator, and then
plumb that to your regular compressor. It will give you a burst of
full flow and full power to break the nuts loose, then you'll hit the
existing air system restrictions.


-- Bruce --


I use a small air brake tank salvaged from a military water buffalo for just
that. The tank is something like 6" in diameter and 8" long with ports on
each bell end. I have quick disconnects on each end and the air wrench
attaches right to the tank. I use this setup on my 3/4" impact and it makes
ALL the difference. With this setup I don't have to upgrade my 3/8" air
line for the 3/4" impact wrench. It's kinda neat listening to the tank
refill after each trigger pull, which proves that the air line is undersized
/ overly restricted for the amount of air being demanded.


Shawn