Air-tools are a god-send for mechanics, offering an endless supply of force in the form of compressed air that allows for these high-powered tools to operate all day without needing to charge up (unless, that is, your air compressor asthmatically can’t keep up with them), and a variety of tools operate off the same universal air fitting — which we’ll exploit for today’s Wrenchin’ Wednesday ...
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Speaking about air tools, I hardly use mine anymore. Although there is no substitute for an air hammer, with the development of lithium batteries, I use my Milwaukee 1/4", 3/8" battery powered ratchets and 1/2" impact almost exclusively vs my air wrenches. I used to use my IR 1/2" when the Milwaukee just didn't have it but my new 2767 Milwaukee eliminated that need. I'm sure the De Walt tools are just as good.
Air tools were standard 5-10 years ago, but like Tim said, Lithium is advancing so well that cordless is a way to go. So much more convenient and efficient to work on. A good 3/8's lithium powered ratchet is a good cordless tool for many common jobs.
Air tools are still super common in pro shops, are still vastly more affordable than electric, and will never need to charge. I have a shop with a compressor taller than I am, it's getting good use. 🙂
Don't forget to oil your air tools before you use them. Squeeze the trigger as you deposit a FEW drops of oil in the air fitting (where the quick-disconnect attaches) and after you have hooked the air hose up, hold a shop towel over the exhaust port and run the tool at low to medium speed until the oil mist dissipates.