I am using no hub couplings to connect drain pipes and the couplings are
made of stainless steel clamps with a 3/8" hex head with specifications
called for tightening to 80 pound-in.
I have a torque wrench that will tighten to 60 pound-inch and then releases
but not 80, and I don't want to pay a lot of money to for a 90 pound-in
torque wrench just to tighten 2 couplings and will not have a use for it
ever. Is there any trick anyone can think of that would allow me to tighen
to that specification?
Use an extention to increase the leverage between the click mechanism
and the screw head. Or use a pull scale on the end of a wrench and do
the calculations for length. 8 lbs on a 10 inch wrench would do it.
Besides, the torque is NOT terribly critical. I generally make them
"wrist tight" using a 3 inch ratchet or "pretty durn tight" with a
On Oct 13, 7:54 pm, email@example.com wrote:
80 in-lbs is 6.5 ft-lbs
~ 8 lbs on a 10" (like the size of a 1/2" drive ratchet)
~15 lbs on a 3/8 drive ratchet
not a lot of force
put your torque wrench in a vice and drive the socket end to it with a
wrench or ratchet....."calibrate" your arm, hand, wrist to 60 in-lbs
and add 1/3 of oyur 80 in-lbs
I've never seen anyone actually using a torque wrench on these
couplings. You just tighten them up like most things, to be
reasonably tight, but not risk stripping them.
Ditto, its just a coupling, grab a tool and tighten it...
Although, for most (many?) of us on AHR, tightening a wide range of
things is second nature.....after YEARS of doing so.
For some, every new device or situation, is just that.....a new
situation. Without experience or a "reference", it is hard for these
folks to execute confidently on these new and unfamiliar tasks.
I had a 15+ year apprenticeship on all manner of mechancial devices &
situations (followed by another 30+ years of professional
practice) ..... not everyone has the luxury of such an experience.
That's why it is helpful to "know one's audience" and to attempt to
relate the real world of mechanical experience to something they can
As they gain experience, they will eventually "just grab a wrench &
tighten it". :)
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