"Faustino Dina" wrote in message
...

Is it any method for the router
bits the get "softened" (I mean using oil, polisher or something else)
such
a way to allow the bit get into the router?

Your bits should fit snugly in the router collette before its tightened, but
not require forcing or oil or polishing. Be sure the locking nut is backed
off all the way before you try to insert the bit. A router collette has got
two "stages" for loosening. It could be that the collette is partially
engaged when you try to insert the bit.

If loosening the nut doesn't help, then I think you have an out of tolerance
collette and should return the router for a new one.

Bob