As someone who is mainly site based in the UK I can tell you that with 90% of tools out there from the USA it will work - many of the 110 volt tools we get are identical to the US market models if you check the relevant part numbers. With variable speed routers you may find that they run a little slower, that's probably all, but unfortunately you can't guarantee it. I've have had Porter-Cable stuff in the past imported from the USA (692s), but they were single speed no electrnic speed controllers where there are no problems with the frequency. I still have a Festo OF1000 "115 volt 60Hz USA " router bought over there years ago and brought back. Runs off my site transformer quite happily.. More than fifteen years on it is still working and it hasn't crashed or burned, yet