Can someone explain to me the science (assuming there is some) behind this? I just replaced a 3450 RPM motor on my little TS with a 1725 and getting a larger sheave is on my todo list. The motor had a sheave that was larger than the one I had on the old motor, but not large enough to make up the difference. I hooked it up mostly just to make sure I had a workable set up (the motor is adapted for this use). Curiosity got the better of me and I raised the blade and made a couple of cuts. It cuts slower, but substantially quieter. The saw is an old Crafstman 9" benchtop and it came to me with a 1/2 HP motor. That is a little weak for some applications and it bogs a bit sometimes. But at the lower speed it handled a cut that was problematic before. It's hard to describe exactly, but slowing the feed rate with the faster blade isn't the same.
Along the same lines, I am close to firing up an old 4" jointer with an almost identical motor that I also need another sheave for. Reading up on it, the suggested RPM of the cutter is around 4K. I noticed the newer benchtops claim about 10K. I think the sheaves on these motors combined with the small tool sheaves is giving me around 3K.
Along the same lines, I am close to firing up an old 4" jointer with an almost identical motor that I also need another sheave for. Reading up on it, the suggested RPM of the cutter is around 4K. I noticed the newer benchtops claim about 10K. I think the sheaves on these motors combined with the small tool sheaves is giving me around 3K.