Recently Kevin posted about his having problems with the FD Polar blades and they had such fine teeth like a hacksaw. I was interested so took a look at my FD blades including the Polar, the Scroll Reverse and Ultra Reverse.
Here is a picture of the FD Polar Blades #5, #7 and #9., The #7 and #9 are both 14 tpi and the #5 is 16.5 tpi
Next is the Scroll Revers blades #5 and #7 which are 13 and 10 tpi.
And Finally the Ultra Reverse #5, #7 and #9 which are 15, 12 and 12 tpi.
The Polar blades have the largest and most aggressive teeth and it is surprising that they are not cutting well. It is what I use for compound cuts. Perhaps, if Kevin is having problems and the teeth are like hacksaw blades, he got the wrong blades?