Richard Butler
02-17-2007, 11:31 PM
I have been doing a little research into band saw blade speeds and it seems that I am getting some conflicting numbers.
It seems that the old Delta (1943 vintage) 14" saw had a blade speed of 2200 SFPM. The new Delta saws are being shipped with the blade travelling at 3000 SFPM.
My saw is a 28-243 and that saw had two different sized pulley pairs. The old version was 2.75 drive pulley and 6" driven pulley. The newer version of that saw was shipped with a 2.25" drive pulley and 4.625" driven pulley set.
According to http://www.owwm.com/Math/SFPM.asp those pulley sets yield blade speeds of 2896 SFPM and 3074 SFPM respectively.
If you look at the same owwm.com page you will see the highest speed for a 14" saw is 3300 SFPM.
Do I dare bump up the blade speed of my bandsaw to 3300 SFPM? Iturra runs his saw at 4000 SFPM!
I was doing some other calculations trying to correlate RPM to line frequency (Hz) and came up with a factor of 28.75. 1725/60=28.75 which to me is off. I would have expected something like 30.00. How does one calculate this?
It seems that the old Delta (1943 vintage) 14" saw had a blade speed of 2200 SFPM. The new Delta saws are being shipped with the blade travelling at 3000 SFPM.
My saw is a 28-243 and that saw had two different sized pulley pairs. The old version was 2.75 drive pulley and 6" driven pulley. The newer version of that saw was shipped with a 2.25" drive pulley and 4.625" driven pulley set.
According to http://www.owwm.com/Math/SFPM.asp those pulley sets yield blade speeds of 2896 SFPM and 3074 SFPM respectively.
If you look at the same owwm.com page you will see the highest speed for a 14" saw is 3300 SFPM.
Do I dare bump up the blade speed of my bandsaw to 3300 SFPM? Iturra runs his saw at 4000 SFPM!
I was doing some other calculations trying to correlate RPM to line frequency (Hz) and came up with a factor of 28.75. 1725/60=28.75 which to me is off. I would have expected something like 30.00. How does one calculate this?