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Pneumatic tools
Cordless tools
Workshop equipment
Construction equipment
Compressors
Generators
October 19, 2017
Learn how to properly size your piston compressor based on your needs
Air compressors should be sized based on the volume of air (cfm/m3h) and air pressure (psi/bar) needed to do the job and not horse power. Single stage air compressors have a maximum pressure of around 130 psi (9 bar) while two stage air compressors have a maxinum air pressure of 175 psi (12 bar). Tank size is typically not a critical factor in sizing a compressor.
Calculating your need
Typical cfm consumption by tool
| Tool/Equipment | Air Pressure (psi) | Air Pressure (bar) | Air Consumed (cfm) | Air Consumed (l/s) |
| Impact Wrench 3/8-1/2 | 70-90 | 4.8-6.2 | 5 | 2.36 |
| Impact Wrench 1/2-3/4 | 70-90 | 4.8-6.2 | 10 | 4.72 |
| Impact Wrench 3/4-1 3/4 | 70-90 | 4.8-6.2 | 20 | 9.44 |
| Air Ratchet | 70-90 | 4.8-6.2 | 3-5 | 1.42-2.36 |
| Body Sander (Oribital) | 70-90 | 4.8-6.2 | 12 | 5.66 |
| Tire Changer | 125-150 | 8.6-10.3 | 2 | 0.94 |
| Bead Breaker | 125-150 | 8.6-10.3 | 12 | 5.66 |
| Blow Gun | 70-90 | 4.8-6.2 | 3 | 1.42 |
| Die Grinder | 70-90 | 4.8-6.2 | 7 | 3.3 |
| Screwdriver #2-6 Screw | 70-90 | 4.8-6.2 | 5 | 2.36 |
| Screwdriver #6-5/16 Screw | 70-90 | 4.8-6.2 | 10 | 4.72 |
| Paint Spray Gun (Touch Up) | 70-90 | 4.8-6.2 | 4 | 1.89 |
| Paint Spray Gun (HVLP) | 40-60 | 2.7-4.1 | 15 | 7.08 |
| Nailers/Staplers | 70-90 | 4.8-6.2 | 2-4 | 0.94-1.89 |
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