Quote Originally Posted by TheChunk View Post
Maybe the extension put a larger bending moment through the router spindle, effectively trying to twist the inner race out of the bearings and they overheated? Seems plausible if the motor is running ok but the spindle is out of whack.
I don't think Jonathan can complain considering how much he paid for the router as it was never intended to be used as aggressively.

Increasing the effective length of the cutter will exert more bending action on the spindle, which now seems to be bent. This is in an even more dangerous condition and the end could just fly off with serious consequences.

Jonathan regards to your original question i would stick with 1.5Kw as your machine has some flex issues which you yourself have mentioned, going for an even more powerful motor will allow you to think you can push it further than it wants to go.

A machine is only as strong as its weakest link.

That price you found does seem to be too good to be true btw.

Regarding cutter length Trend do indeed make 8mm shank cutters in the length of 60mm + square ended but even Carbide cutters are mounted on HSS shanks.

HSS cannot bend, only break that is what makes them a safer bet than an extension made from anything other than HSS which Trend will not make that type of extension as it would be dangerous.

It may be good to see if trend have some videos of when it all goes wrong.

The British team going for a new LSR of 1000MPH the wheels will be going around 10000 RPM they have to to be made of exotic metals as they are likely to explode, centrifugal force is an extremely potent force indeed.

Phil