12-22-2017, 06:28 PM
This is an interesting topic. Grepper asked how the difference if a 1x42 Kally is used. I would ask one step further, what if the same Kally was used, except powered by the Penn State Industries variable speed motor running at just over one third the RPM of the Kally's Baldor motor?
The surface feet per minute (SFM) is determined by multiplying the circumference of the wheel by the RPM of the motor. The factory Kally has the advantage over the Viel due to its four inch diameter drive pulley. The factory issue Viel comes with a six inch diameter drive pulley. When equipped with the Viel four inch pulley, this advantage is neutralized. When used with a variable speed motor run at a fraction of the RPM, the sfm is reduced much further. The result is not as cool as a Tormek, however, I can hold a piece of metal in my fingers much longer than with a full speed grinder.
I am curious about your thoughts.
Ken
The surface feet per minute (SFM) is determined by multiplying the circumference of the wheel by the RPM of the motor. The factory Kally has the advantage over the Viel due to its four inch diameter drive pulley. The factory issue Viel comes with a six inch diameter drive pulley. When equipped with the Viel four inch pulley, this advantage is neutralized. When used with a variable speed motor run at a fraction of the RPM, the sfm is reduced much further. The result is not as cool as a Tormek, however, I can hold a piece of metal in my fingers much longer than with a full speed grinder.
I am curious about your thoughts.
Ken