Had a big bad Square D box on my compressor. It would make the motor contacts chatter every time at cut-off pressure.Come on, this isn't rocket-science! Square-D has been making these since the beginning of time. For every full turn of the nut, on the long spring, changes the cutoff pressure 10 psi. Now how hard is that? Don't mess with the short spring unless you are a masochist! You could buy a couple of them for the price of the digital one. My 20 year old compressor has the original one and it's still working fine.
Now if going digital floats your boat then for a little over 200 bucks, Milton will gladly sell you a digital tire inflator that has an 0.05% accuracy rating, compressor is not included.
Was really good test for the motor. Now it's in a box...
First the wheel.
Then the cart.
Then the gas powered buggy.
Then the electric buggy.
Neanderthals who grew up with the wheel stay with the wheel.