Lynn Kasdorf
02-17-2007, 9:14 PM
I'll be powering up my old SCMI sliding table saw this year (finally!) and I need to work out the details. Currently the saw does not have a motor mounted, although I have a possible candidate.
The arbor has a cone pulley that has 3 speeds. Each speed has 2 3L grooves. I do not have the cone pulley for the motor.
The 3 speeds arbor speeds available on the saw are supposed to be 3200, 4500, and 6000 rpm (according to the manual and the label on the front).
Here is a chart of what excel tells me should be the dimensions of the motor cone pulley, assuming a 3450 motor.
Arbor RPM | arbor dia. | motor dia.
3200 | 3.86" | 3.58"
4500 | 3.11" | 4"
6000 | 2.56" | 4.45"
Now, I don't see the point of 6000 rpm unless I run a small blade. I plan to run 12" and sometimes 16" blades.
Google tells me that 10" saws run 4000-4150 rpm. 4150 rpm works out to 181 feet/sec at the teeth. To get 181 feet/sec with a 12" blade, you need 3456 rpm and 2592 rpm for 16".
So it all boils down to this. It seems to me that I could come up with a single dual groove pulley such that the arbor runs at approx 3450, which would be ideal for a 12" blade. I have several 12" blades already, so this is likely what I'll use most.
However, on the occasion when I need to capacity of the 16" blade, I wonder if it would be dangerous to run it at 3450? This would yield 241 fps.
The arbor has a cone pulley that has 3 speeds. Each speed has 2 3L grooves. I do not have the cone pulley for the motor.
The 3 speeds arbor speeds available on the saw are supposed to be 3200, 4500, and 6000 rpm (according to the manual and the label on the front).
Here is a chart of what excel tells me should be the dimensions of the motor cone pulley, assuming a 3450 motor.
Arbor RPM | arbor dia. | motor dia.
3200 | 3.86" | 3.58"
4500 | 3.11" | 4"
6000 | 2.56" | 4.45"
Now, I don't see the point of 6000 rpm unless I run a small blade. I plan to run 12" and sometimes 16" blades.
Google tells me that 10" saws run 4000-4150 rpm. 4150 rpm works out to 181 feet/sec at the teeth. To get 181 feet/sec with a 12" blade, you need 3456 rpm and 2592 rpm for 16".
So it all boils down to this. It seems to me that I could come up with a single dual groove pulley such that the arbor runs at approx 3450, which would be ideal for a 12" blade. I have several 12" blades already, so this is likely what I'll use most.
However, on the occasion when I need to capacity of the 16" blade, I wonder if it would be dangerous to run it at 3450? This would yield 241 fps.