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9" Band Saw motor pulley

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  • 9" Band Saw motor pulley

    i have a Trade master 9" Band saw - Model PR13102 ; and the parts are now obsolete.
    i am looking for a new drive motor pulley or its dimensions so than i can get one made.
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  • #2

    Re: 9" Band Saw motor pulley

    TSC Stores or Peavey Mart if you are out west.

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    • #3

      Re: 9" Band Saw motor pulley

      I assume the motor pulley is missing which is odd but not a problem. The shaft size is the easy part, just measure the motor shaft. The outside diameter can be calculated as follows. Start with the desired blade or band speed, typical band sawblade speed for wood is 3000 fpm. A 9" wheel has a diameter of about 28"(9x pi). So you need a wheel rpm of about 1286 rpm. (3000x12/28) to achieve a bandspeed of 3000 fpm. So the required motor pulley outside diameter can be calculated from the driven pulley diameter and the motor speed. Check your motor nameplate for your motor speed. Let's assume it is 3450 rpm and your driven pulley is say 6", so you would need a 2.2" (say 2 1/4") diameter motor pulley. (1286/3450 x 6). Then go to a supplier like Motion Canada and buy the closest size available.

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      • #4

        Re: 9" Band Saw motor pulley

        If you want to play around with the speed you can use this calculator to get what you want.http://vintagemachinery.org/math/sfpm.aspx
        Doug G likes this.
        Jerome
        Canada's South Coast

        Port Colborne On.
        CARPENTER noun. (car-pun-ter)
        1) A person who solves problems you can't.
        2) One who does precision guesswork based on unreliable data, provided by those of questionable knowledge. see also: wizard, magician.

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        • #5

          Re: 9" Band Saw motor pulley

          Originally posted by Doug G View Post
          I assume the motor pulley is missing which is odd but not a problem. The shaft size is the easy part, just measure the motor shaft. The outside diameter can be calculated as follows. Start with the desired blade or band speed, typical band sawblade speed for wood is 3000 fpm. A 9" wheel has a diameter of about 28"(9x pi). So you need a wheel rpm of about 1286 rpm. (3000x12/28) to achieve a bandspeed of 3000 fpm. So the required motor pulley outside diameter can be calculated from the driven pulley diameter and the motor speed. Check your motor nameplate for your motor speed. Let's assume it is 3450 rpm and your driven pulley is say 6", so you would need a 2.2" (say 2 1/4") diameter motor pulley. (1286/3450 x 6). Then go to a supplier like Motion Canada and buy the closest size available.
          I have a bandsaw with speed 1750, and I would think this would be a more reasonable speed. I put a 3450 motor on for about a minute until I realized it was insane, nobody would run a bandsaw that fast. The 3450 motor was supposed to be for my table saw.

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          • #6

            Re: 9" Band Saw motor pulley

            Originally posted by Wood Grower View Post

            I have a bandsaw with speed 1750, and I would think this would be a more reasonable speed. I put a 3450 motor on for about a minute until I realized it was insane, nobody would run a bandsaw that fast. The 3450 motor was supposed to be for my table saw.
            Yes if you have a band saw with the motor and driven pulleys selected for a 1750 rpm motor and you put a 3450 rpm motor on it, it will run too fast.

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            • #7

              Re: 9" Band Saw motor pulley

              The pulleys should be pretty generic. Chances are your local hardware store will have some that fit.
              Egon
              from
              The South Shore, Nova Scotia

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              • #8

                Re: 9" Band Saw motor pulley

                this bandsaw very likely has an integral motor not a separate motor with a v belt
                the belt is probably a narrow flat ribbed belt
                to the op, try king or ryobi, get a look at the motor and pulley at a dealer, you might get lucky!
                my shop is a beaver lodge
                steve, sarnia, ont




                1940's Craftmaster Lathe

                https://www.facebook.com/artistryinwoodca/

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                • #9

                  Re: 9" Band Saw motor pulley

                  If it’s a flat belt the hardware store may not be the place to look.
                  Egon
                  from
                  The South Shore, Nova Scotia

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                  • #10

                    Re: 9" Band Saw motor pulley

                    According to what I see on the web the drive belt is a toothed (cogged) belt, so that certainly complicates the mission. However, places like Motion Canada, Canadian Bearings etc can supply these pulleys as well as the belts. What's needed is to know the motor RPM and the diameter of the remaining pulley so that the calculations can be done for the diameter of the missing pulley. While the bore is important, it's less important as a smaller bore pulley can be opened up and keyed if necessary.

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