So yesterday I had the router running constantly for about 40 minutes with dust collector on. I had been using a pattern bit. Just as I was about done it dawned on me that now would be a good time to get a temperature measurement of the router. I grabbed my Fluke DVM with temperature probe, turned off the DC and router, opened the door and immediately took its temperature. 78 deg F. Ambient room temperature was 65 deg F. So, a mere 13 deg rise. Not bad at all. I put my hands on the motor directly, and honestly, I could not tell the motor had even been on.
Back in late fall, before I had a dust collection box, I had taken some temperature measurements before and after a 20 minute playing-with-the router session (I actually had the probe attached to motor case the whole time). Back then, I experienced about 30 degree temperature. 13 is looking really good.
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