Cut with a chop saw, with a grinding disk.
It you have an angle grinder you could cut them with that..


Quote Originally Posted by lateAtNight View Post
There is flex in all types of unsupported rail... be it 12, 16 or 20. How much in these I don't really know.

It all comes down to how big you want your router and what types of material you want to work with.

You won't cut the shafts with a hack saw or anything like that. I tried once for about 5 mins and left a barely visible mark which I coulden't even feel when I ran finger over it. Sometimes the rails have kind of scorch marks on the end, so I am assuming some sort of heated cutting is involved.

For all that they cost its best to order them the length you need.