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JET JWBS-14CS band saw question

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Forum topic by ohtimberwolf posted 07-28-2013 05:41 PM 613 views 0 times favorited 4 replies Add to Favorites Watch
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ohtimberwolf

268 posts in 1005 days


07-28-2013 05:41 PM

Topic tags/keywords: jet bandsaw band saw 14cs

I just got a JET Model JWBS-14CS Band Saw that came without a motor. I want to put a different motor on it. I have a 5 hp to put on my Delta 10” table saw and plan on putting the 1 ½ hp, 3450 rpm motor off of it on the Jet. Here is my problem.

I don’t know what pulley to put on the motor to make the saw run correctly. Can someone tell me what size pulley should go on that motor so I don’t run a 100 mph band saw derby? larry

-- Used to be a barn cat, now a lap cat...


4 replies so far

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JustJoe

1554 posts in 691 days


#1 posted 07-28-2013 06:34 PM

Assuming the other pulley is original, then it looks like you need a 3” one on the motor:
http://www.ereplacementparts.com/motor-pulley-p-787203.html

If you want to see how fast your 3450 will end up being after running it through the pulleys, then try a site like this:

http://www.culvermotor.com/Engineering-Formulas/Pulley-and-RPM-Calculator.html
Use the bottom formula. Put 3450 in for speed 1, put whatever the pulley size on the bandsaw itself is into the box for diameter 2. Check the circle for rpm2 and then play around with different numbers for diameter 1 (the pulley on the motor) until you get a speed you are happy with.

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MrUnix

504 posts in 851 days


#2 posted 07-28-2013 06:43 PM

Depends on what size pulley is on the band saw, although you might have to change that if you are going to be using a 3450 rpm motor (typical band saw motor is 1725 rpm). You want to keep the sfpm around 3000 give or take a few hundred.. no more than around 3500. You also don’t want any pulley too small as v-belts don’t like tight turns.

Here is a sfpm calculator you can use to figure out speeds with various sized pulleys:

http://vintagemachinery.org/math/sfpm.aspx

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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ohtimberwolf

268 posts in 1005 days


#3 posted 07-28-2013 09:52 PM

Thanks guys, that should get me out of the woods. larry

-- Used to be a barn cat, now a lap cat...

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ohtimberwolf

268 posts in 1005 days


#4 posted 07-29-2013 01:39 PM

To keep the sfpm within range (3000-3500) using the 3450 rpm motor it looks like I have to replace the 6 inch band saw pulley with one much larger in order to keep from having a really small pulley on the motor.

A 10 inch pulley on the saw and 3 inch on the motor will make the sfpm 3656. Is it reasonable to do a 10 inch pulley? The pulley for the tire is 13.5 inches. Am I missing another solution to this other than buying another motor or is 10 inches ok? larry

-- Used to be a barn cat, now a lap cat...

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