Freud does not publish speed limits. Also, the diameter is 1-1/4" instead of 1" as stated in these specifications. I had to email Freud to get this information and came back a day later with a plot of velocity versus diameter. Luckily the person also said the actual diameter, otherwise I would have ordered the wrong nozzle. My laminate trimmer rotates at up to 30,000 rpm. This bit is limited to 18,000 rpm per Freud and box, but the email suggested going even slower at 16,000 rpm.