Is it finally time to blow your old air compressor out the door?

Have battery-operated automotive hand-tools evolved to the point where it’s time to relegate air compressors, their lines and tools to the junk bin? Even for DIY home techs who seldom pick up a wrench, power tools can make many vehicle maintenance and repair tasks much easier. When it comes to removing multiple nuts and bolts (especially those that have a rusty or stubborn nature), a power wrench can prevent a lot of skinned knuckles and muscle aches. When tool companies first came out with cordless battery air hammers and such, they didn’t impress too many technicians with their short running time and general lack of power compared to air-operated tools.

But a lot has changed. 18-volt systems have replaced 12-volt, bringing more punch to the table. Lithium batteries provide much longer run times, steadier output, and more reliability. They also bypass the hassle of dragging an air line or electrical cord into tight spaces with sharp edges that can obstruct or damage them.

For those who think no battery tool can break heavy fasteners loose, think again. Milwaukee and DeWalt both have models that can deliver 700 ft-lbs of fastening torque and 1,200+ ft-lbs of breaking torque. Many professional and DIY techs — your editor included — have learned the hard way to dial back their battery gun settings to avoid breaking lighter fasteners.

Retiring an air compressor means a much quieter shop and no regular maintenance such as draining water out of its tank and changing the oil. But there are jobs that still require compressed air, such as using a blow-gun to clear debris, or inflating a tire. But these can easily be handled with a smaller portable compressor, rather than the bulky, noisy, permanent type.

Reliable battery power doesn’t come cheap, but a basic set of electric tools is comparable in price to a quality air-compressor and lines. It’s best to stick with one good brand for battery interchangeability and having an extra battery pack or two isn’t a bad idea depending on your frequency of use. And of course, if the electrical power fails while you’re in the middle of a job, you can still keep going.

The ideal situation would be using both air and battery, especially if your shop is already compressor-equipped. Of course, when you’re away from the shop and an emergency repair comes up, your battery tools can save the day — if you remembered to pack them.

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