For example, an air compressor rated for 20 CFM means it can supply 20 cubic feet of air per minute. Cubic Feet Per Minute (CFM) CapacityĬFM capacity is the amount of air that surges out of the hose attached to the tank holding compressed air. It is safe to stay on or above the 90 PSI mark to extract the most potential out of an air compressor. Smaller tools like an air-wrench can get work done for longer with a 90 PSI-rated compressor. If painting and sanding are your main priorities, then going for the higher end of this spectrum (100 – 175 PSI) is the right choice for you. It is the measurement of the pressure difference between the tank and atmosphere. A higher PSI rating is always recommended. It allows for the usage of a wider range of tools. PSI stands for “Pounds per square inch” and it refers to the force of air coming out of the compressor. It is an accurate indicator of efficiency and performance. Horsepower rating is relative to the CFM and max PSI levels. Industrial-grade compressors used for painting and other heavy-duty applications make up to 5 hp. Cheap air compressors are typically equipped with low-power 1 hp motors while the pricier, compact ones can go as high as 3 hp. The horsepower rating is crucial as it dictates the performance and capacity of the compressor. Here are some specifications you should pay close attention to. Lastly, you need to ensure you purchase the right fittings and the right hose.ĭon’t forget to take a close look at the technical specifications before purchasing a compressor. If you want the option of being able to use your compressor anywhere other than your garage, that will influence your purchase decision. You’re going to have to find a way to muffle the noise or choose a silent compressor. That’s as loud as a straight-piped Civic at 3am. Some of the larger compressors can get as loud as 100 decibels. Sound level is an important factor to think about. To power a compressor, you’ll require a 230v or 240v outlet. These tools consume a ton of air - the more air they consume, the more power you’re going to need, and the more input voltage you’ll need as a result.Īnother thing to consider is the availability of power outlets in your garage. When shopping for air compressors, the first thing you need to do is, to be honest with yourself about what you’re going to use them for.ĭo you intend on using it only occasionally for small jobs like inflating tires or pressure washing? Then go for a small, portable pancake-type compressor.īut if you want to use air tools like double action sanders and grinders for prolonged hours, then you should buy the biggest and most powerful compressor you can afford. Let’s dive right in! Choosing the Right Air Compressor In this helpful guide, you’ll find everything you need to know before purchasing a good shop air compressor, along with some of our top-rated options. Finding the right one for your needs can be tricky, but that’s why we’re here. The challenge is that the market is flooded with hundreds of options to choose from. Whether you’re a DIYer, a contractor, or an automotive technician a good air compressor is going to be an excellent addition to your arsenal of tools.Įverything from sanding down your car and giving it a new coat of paint, or inflating your tires and degreasing your engine can be done with the help of an air compressor and pneumatic tools. Air compressors are incredibly useful and versatile equipment.
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