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What is a bandsaw's operating speed?

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DaveK

09-18-2002 06:09:51




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While driving past a dumpster yesterday, I saw a band saw being tossed. It is a complete unit except it seems to be made to be driven as part of a Shopsmith unit. All it has is a shaft coming out of the side from the bottom pulley. Can anyone tell me the effective speed that the saw should operate at (fpm?) so I can assemble the proper pulley and belt ratio. I intend to install a stand alone motor unit for this unless some nice person throws the rest of the shopsmith out.

Thanks in advance for any information.

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steve

09-21-2002 13:01:42




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 Re: What is a bandsaw's operating speed? in reply to DaveK, 09-18-2002 06:09:51  
for wood you wnt 3000 feet per minute and for metal you want 150 feet per minute. remember that the circumference for the wheel is measured in feet. one revolution of the wheel is approx equal to the diameter times pie (3.14), just say 3. so a 18 inch diameter wheel is 1.5 feet diameter times 3 is 4.5 feet per revolution. you would need about 600-700 rpm of the shaft to get 2500-3000 feet per minute of blade speed. most saws use a 1800 RPM motor and 3 to 1 pulley to get the saw shaft to 600 RPM. big pulley goes on the saw, small on the motor.

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PeterS

09-19-2002 11:16:40




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 Re: What is a bandsaw's operating speed? in reply to DaveK, 09-18-2002 06:09:51  
Where is this dumpster? Seriously, these things go for >$250 on ebay all the time. Does it say Shopsmith on it? Does it have a cast iron or aluminum table? Is it gray or green? Does it say "Magna Engineering"? You can also buy from $hop$mith something they call a "Power Station" ($400+) and for additional cost, the exact pulley you need to drive the Bandsaw at the correct speed for woodworking. Personally I would sell it to the cash-rich, bandsaw-starved masses over on e-bay and use the proceeds to pick up an older used Delta 14". They are much beefier. I would be glad to help you sell this on ebay, it is quite simple. if you do not have a digital camera, you can even "borrow" a digital image from a similar ebay auction. Lots of luck!

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PeterS

09-19-2002 11:23:52




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 Re: Re: What is a bandsaw's operating speed? in reply to PeterS, 09-19-2002 11:16:40  
I just checkedout the Shopsmith site and the kit to convert what you may have is on sale. Check out the link.



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Dave K

09-19-2002 20:23:59




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 Re: Re: Re: What is a bandsaw's operating speed? in reply to PeterS, 09-19-2002 11:23:52  
Peter-
I neglected to mention that I picked up a few misc. pieces that were with the saw unit and now that I checked your link to Shopsmith, what I have is about 50% of the power stand unit shown. I need the pulleys, one leg of the stand and the motor (of which I already have serveral) I had look on the Shopsmith site and did not find the link you furnished. Thank you very much for the info. This is a great site. DaveK (Indiana)

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Ray,IN

09-19-2002 20:59:11




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 Re: Re: Re: Re: What is a bandsaw's operating speed? in reply to Dave K, 09-19-2002 20:23:59  
Dave, The motor is a variable speed unit with a crank on the motor to control speed. It's the high dollar componet of the machine.



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Rod (NH)

09-18-2002 16:10:04




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 Re: What is a bandsaw's operating speed? in reply to DaveK, 09-18-2002 06:09:51  
Hi dave,

I believe the the speed for bandsaws is 2000-3000 surface fpm for wood and 200 surface fpm or less for metal...the "less" for thicker sections. My Delta machine for wood is at 3000 sfpm.

Rod



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Peter(NY)

09-18-2002 12:54:15




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 Re: What is a bandsaw's operating speed? in reply to DaveK, 09-18-2002 06:09:51  
Link This link shows a metal chop (band) saw. Speeds are 80,120 and 200 FPM. Should be the same speeds as a fixed verticle unit. Hope this helps.



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Mac

09-18-2002 10:40:15




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 Re: What is a bandsaw's operating speed? in reply to DaveK, 09-18-2002 06:09:51  
Dave: It seems to me Std RPM's are from 750 to 1150, It depends on application. I got a 2 spd step down pulley on my motor. Different speeds for different materials. Again after you get it set up, you might look about a variable speed control for the unit.



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