I use one also. Normally I have a 14 TPI blade on it. Micarta and G10 drives it wild and uses up blades pretty quick. I use a 20 TPI for my G10 liners.
For the blade stock that you are using I would use a 24 TPI Bi-metal M-42.
G-10 is just brutal on blades, period ! slow speed and Bi-metal, 14 to 18 TPI works.
Take care,
Clint
I have used both bi tooth blades and have had no issues. There are material/blade sfpm/feed rates that I think are helpful to reference. Cutting dry reduces the blade speeds by 40%.
Personally, after having tried various TPI blades on my portaband, the only blades I use now are 18TPI "cobalt" (4% cobalt) blades. As Shawn mentioned, break-in is very important to a blade's longevity.
Thanks for the link - I just read it, and since I'm doing a manual feed rate on a portaband, it's sorta hard to feed at 1/2 feed rate. I tend to use light feed pressure - depending on how it's cutting, so maybe I'm close to correct break in?