Originally Posted by
GingerK
Mine has a little curved 'washer' and I found that it does matter which way the curve faces. But it provides a tiny bit of space for the blade to turn. I have found the opposite problem--the screw holding the blade tends to loosen a bit over time. I've taken to checking each time I want to cut a bunch of stuff or am trimming a lot of blocks.
I have noticed that only my older cutters have the retainer ring. I have also noticed my older cutters work better than the newer ones without the ring. I have been thinking about going to Lowe's to see if I can find a couple for my new cutters.