The teeth feel much catchier after filing them with a triangular jeweler’s saw (left half is done), but it still takes a minute of rocking the but back and forth to get through 3/4" plywood.
The teeth feel much catchier after filing them with a triangular jeweler’s saw (left half is done), but it still takes a minute of rocking the but back and forth to get through 3/4" plywood.
They pretty much are. You can sharpen them, but the issue I’ve found is that over time and use they heat up and warp, and effectively become useless (especially on metal).
You could always do the old tile-cutting trick. Use the saw to cut a sponge. Now you have a sponge that perfectly fits inside the hole saw. Get it wet, and leave it in the saw when you cut. Now your hole saw will be cooled by the water in the sponge.
It’s an old trick for when you can’t easily keep running water on a tile saw while cutting a hole. Cuz you typically cut tile under water to prevent your blade from heating up. But if that’s not feasible, you can essentially just fill your saw blade with water instead.