Bird
Rest in Peace
All that said, we still have found some things that the air impact still won't budge. In that case, I get out the electric impact. Haven't found anything it wont take off. I can even run it from my truck with a 1500 watt power inverter. The electric impact is from Harbor Freight and cost me $39 on sale.
Yep, like the other guys said, that's unusual. In fact, there would have to be something wrong with your air supply or pneumatic impact UNLESS your air tool is also a cheap and weak unit. The Harbor Freight electric is rated at 240 ft. lbs. and I used to have a Harbor Freight (Central Pneumatic) 1/2" air impact (CP734 knock off) that was only rated at 210 ft. lbs.
In years past, I've owned both a Black & Decker and a Craftsman 1/2" electric impacts and they were rated for 210-250 ft. lbs. They were very handy for a full time RVer with a generator in the RV, but no air-compressor except for a 2 gallon 1/2 hp unit. One of my brothers who is s full time RVer still carries a Craftsman.