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Bandsaw motor RPM???

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Forum topic by okwoodshop posted 09-11-2012 01:56 AM 2336 views 0 times favorited 6 replies Add to Favorites Watch
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okwoodshop

448 posts in 2635 days


09-11-2012 01:56 AM

Topic tags/keywords: question

I found an old bandsaw but the motor is not working. It is a 3/4 hp,1725 RPM. My brother has a 3/4 hp 3450 RPM. Will this work or would it be to fast???


6 replies so far

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Grandpa

3256 posts in 2136 days


#1 posted 09-11-2012 02:00 AM

Check the size of the pulleys. Check yours and your brothers. To get the same blade speed the motor pulley would have be half as large if you get the 3450 rpm motor. Get a 3/4 hp with 1725. they are available. don’t try to double the speed on the blade.

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okwoodshop

448 posts in 2635 days


#2 posted 09-11-2012 02:08 AM

Yea, his motor wasn’t on a saw, just one he had. I was afraid it would be to fast. Thanks

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Grandpa

3256 posts in 2136 days


#3 posted 09-11-2012 02:18 AM

You could use his motor but change the pulleys. I think on my saw they are both (pulleys) are 2.5 inch dia. I would probably change the one on the lower wheel to a 5 inch and buy a longer belt. That would keep the speed the same as now and you would have a larger motor. If the pulley is too small it is hard on the belts. They don’t grip well either.

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shampeon

1711 posts in 1644 days


#4 posted 09-11-2012 02:33 AM

Have you tried fixing the motor? A lot of times, all that’s needed is to blow out the accumulated sawdust, fix a loose wire, or replace a capacitor.

Regardless, you’re going to have to adjust the pulley sizes when stepping up motor RPM.

If you do decide to use the 3450 motor, use the SFPM calculator here.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

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Surfside

3389 posts in 1634 days


#5 posted 09-11-2012 02:17 PM

Why are you afraid of getting the saw too fast? What are you going to cut with it?

-- "someone has to be wounded for others to be saved, someone has to sacrifice for others to feel happiness, someone has to die so others could live"

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okwoodshop

448 posts in 2635 days


#6 posted 09-11-2012 02:48 PM

Just cutting wood but was afraid it would hurt the bearings on the wheels? The motor bogged down and stopped when it was on 110, when we changed it to 220 it runs for just a second and then trips the breaker??

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