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Old 09-10-2007, 07:52 AM
randy6679 randy6679 is offline
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How to slow down a band saw???

I wanted to know if it were possible to slow down a band saw for metal cutting? I have a real old heavy duty band saw that I would like to slow down to around 100 - 150 fpm. Right now it is just a single belt going from motor pulley to wheel pulley. I know I could put different size pulleys to slow it down some but I still don't think it would get it slow enough. Does someone make some type of gear reduction box for straight out of the motor? Or maybe someone has done a double or triple step down with pulleys. Any help would be appreciated. Thanks.

Randy Bush
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Old 09-10-2007, 09:09 AM
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B.Finnigan B.Finnigan is offline
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My JET 4x6 has two triple pulleys and I use the slowest speed which I think is about 120. You should be able to do it with just pulley reduction. Have you contacted the manufacturer?
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Old 09-10-2007, 03:23 PM
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TexasJack TexasJack is offline
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Do a search around the forum for band saws. One or two guys have slowed woodworking saws down so they could use them for metal cutting and at least one of them posted some info on it.


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Old 09-10-2007, 04:31 PM
Mr Mike Mr Mike is offline
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Randy,

Here is a link to a post I made a couple of years ago with a similar project. . . I hope it helps.

http://www.knifenetwork.com/forum/sh...ad.php?t=25080

-Mike


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Old 09-11-2007, 07:42 PM
randy6679 randy6679 is offline
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Mike, thanks for the info, that really helps! Maybe you can answer a technical question for me... The motor on the band saw is a 1725 RPM. The final wheel that the actual blade goes on is 63.5 inches around, so one revolution of the wheel makes the blade travel 63.5 inches. Will it be possible to slow it down to 100 FPM with out a variable speed motor? Also any info on where to get the pulleys and jack shaft pulleys, what exactly should I ask for. Thanks again for any info!!!

Randy Bush rbush6679@aol.com
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Old 09-11-2007, 10:57 PM
Mr Mike Mr Mike is offline
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Quote:
Originally Posted by randy6679
Mike, thanks for the info, that really helps! Maybe you can answer a technical question for me... The motor on the band saw is a 1725 RPM. The final wheel that the actual blade goes on is 63.5 inches around, so one revolution of the wheel makes the blade travel 63.5 inches. Will it be possible to slow it down to 100 FPM with out a variable speed motor? Also any info on where to get the pulleys and jack shaft pulleys, what exactly should I ask for. Thanks again for any info!!!
Hi Randy,

You know, math was never my long suit, if it were, I'd be a lot better off in life than I am. . .

I suppose that it would be possible to get the blade speed slow enough without the use of a variable speed motor, you'd simply have to have a couple more step-down pulley segments. . . how many is beyond me, that's why I opted for the variable speed motor. Besides you get a little more flexibility with a variable speed motor, as you can slow it down for thick hard stock or speed it up for thinner softer materials.

Sorry that I couldn't be of any more help,
-Mike


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