Air compressor recommendations for home shop

I just went through this last year and here's what I discovered. Most compressors from big box stores are of low quality. For a compressor that lasts, consider these tips:

• Consider purchasing an older used compressor and rebuilding it, as their quality was significantly better even 20 years ago.
• Opt for a compressor with a 7.5HP motor. These tend to run at a slightly higher RPM yet are not excessively noisy.
• If possible, get one with an 80-gallon tank, and also consider an extra storage tank if space permits.
• Frequent starts wear out components in single-phase compressors, putting undue stress on the start winding and contacts.
• Starting at a higher kick-in pressure increases this stress. My settings are at 70 psi kick-in and 145 psi kick-out.
• Lower your kick-out pressure, as most standard tools do not require 175 psi—this only wastes pressure and adds unnecessary strain on your equipment.

Currently, my system consists of a Husky 7.5HP 80-gallon compressor (from Home Depot) purchased in the early 2000s. These were essentially repainted Speedaire commercial entry units. I rebuilt both the electric motor and the compressor, while the tank was in excellent condition. The previous owner had set it at 175 psi kick-out, which burned the contacts. He disassembled the compressor and left it as-is. I acquired a 120-gallon air tank as new old stock at a scrap price, bringing my total setup to a 200-gallon system. With lower kick-in and kick-out pressures, the compressor runs for extended periods, which helps to heat up the oil and drive out any condensed water.

This entire setup cost me about $400-$450, including replacement parts and paint. With regular maintenance, my son will likely be the one needing to rebuild it in the future.

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Originally Posted by Goemon

Originally Posted by

X2. And it's not just people in apartments who need or want a small, cheap, quiet setup at home. The members of this forum are quite adept at providing tailored advice if your questions are clearly specified. Unlike forums like Practical Machinist, where your inquiries are often met with suggestions to buy high-end equipment like a Haas vertical machining center, which is impractical for home use.

Minimizing noise is a universal concern. My father lost much of his hearing due to years in a noisy factory. In scenarios where noise is a significant issue, such as in an apartment, an enclosure is the only effective and practical solution. Building an enclosure using an aluminum T-slot frame with plexiglass panels and pyramid-style soundproofing foam can be inexpensive and straightforward. The main issue is spindle cutting noise, regardless of chip clearing methods. Back when I lived in a Manhattan apartment, my neighbors would complain about hearing me walk on the floor.

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