A few weeks ago one of our clients called us pretty concerned. They’d been testing a custom bracket axial fan we built for them, and it was only hitting 4,900 RPM. The spec sheet said 5,300 RPM. That’s not a small gap, and understandably, they wanted answers.<\/p>\n\n\n\n
On our side, every unit from that batch had been tested internally and hit 5,300 RPM without issue. So rather than assuming something had gone wrong on the production floor, our team sat down with the customer and walked through exactly how they were testing the fan. It turned out to be a great reminder of how easy it is to get a misleading RPM reading, even when the fan itself is working perfectly.<\/p>\n\n\n\n
Here’s what we found, and what we’d recommend to anyone testing a cooling fan<\/a> at their own bench.<\/p>\n\n\n\n