First let me thank Forrest for this very interesting post
Now a few words about using the
Speed Reducer with the
PowerPro while bandsawing. In my experience with the bandsaw and a PP, I found clunking of the PP to be a very undesirable feature of sawing at 900 to 950 RPM. I have never noticed any lack of power, even during resawing without the Speed reducer - just the damn clunking. Clunking vibrations have the effect of loosening set screws and possibly other things not yet discovered.
In trying to solve the problems caused by clunking, I have returned my PP to Shopsmith twice. They have gone over the machine and returned it. In addition, we had a beneficial conversation via e-mails. Shopsmith wanted me to return my bandsaw for a re-build, but I turned that offer down, as there were absolutely no issues while using the loaner headstock (a standard Mark V) during the first repair.
During conversations with SS I was told that the steel sanding disk will end clunking issues. Didn't work for me, but is seems to for Forrest and that's a good thing!
I thought I'd try a speed reducer to increase the speed of the PP - and it worked
So that's what I use. Got to say that the sawing and the noise are both very smooth! I don't know about any increase in power, but from what I've read about the PP motor, I think any power increase, if present, is negligible.
One of these days I will change out parts of my bandsaw. It will be interesting to see if these changes affect anything related to clunking. I am particularly interested to see if upper bandsaw wheel changes have an effect. Although my upper wheel needle bearings are always greased, there is a little (very little) wobble on that shaft with no saw blade.
Is this compounded when a large blade and the increased pressure on the wheel is used?