How similar, Pars? You know, a jeweler's saw uses those VERY thin, fine toothed blades, like so;
https://www.google.com/search?q=Jewe...w=1125&bih=844

If this is what you have, I can send you a coupla blades, no charge. But, if you intend to replace the roller axle, I guess sawing the roller would be moot. I suppose one could start by sawing .5 mm off the end of the roller, hoping it is just pinched between the frame, and see if that frees things up. But, of course, if you intend to replace the axle, you could just sand down the end of the roller while it is out of the frame.

I tend to think, though I have no evidence to support this supposition, that the problem is inside, between the axle and the roller. Maybe not.