Replies

1. 
   dgreen | Feb 10, 2009 04:35am | #1

   These folks have some good ones.

   Grainger is another.

    

    

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   Men will never be free until the last king is strangled with the entrails of the last priest.
   ~ Denis Diderot

2. 
   philip | Feb 10, 2009 05:59am | #2

   Joe,
   I can't say where to get pulleys in USA but would want to know why you want to slow down that item. You should be sure what cutter speed is standard for that little 4 inch firstly then if you can get away with not slowing it any you should do so. From my experience of this type of machine it easily permissible to increase cutter block revs by 25 to 20 percent and still be within mechanical safety limits, since they are such small diameter. A higher cutter block speed means more cuts per inch which gives a smoother surface.With a 1horse motor you have lots of power for that size of machine and this would easily cope with increased speed on driven side.What rpm was the original motor and what rpm is the 1 horse?

   Philip Marcou
1. 
   dgreen | Feb 10, 2009 06:04am | #3

   Good point, I was assuming he was going from 1750 to 3600. May not be the case. Good catch! 

    

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   Men will never be free until the last king is strangled with the entrails of the last priest.~ Denis Diderot

1. 
   josefis | Feb 10, 2009 06:47am | #4

   Thanks for the input so far to all.The original manual calls for a 1750 rpm motor at 1/3 hp. Used with a 5" pulley. This put the RPM at the recommended 4500 range. With the original pulleys and motor I had it actually was around 4800 as I calculated. (5.5" motor pulley, 2" blade pulley, 1/3 hp 1725 motor) This ran well however the problem was the motor was so old and mildewy that it was making me sick in my shop. That's what brought about the motor change.My Baldor is 3450 1 hp. Using the original pulleys that puts me around 9500 rpm's. When powered it runs and cuts fine but seems way too fast. I had some concern about the bearings and safety spinning at that high velocity for such a little unit. Just seems like too much.With that being said what do ya'll think now?

1. 
   Tinkerer3 | Feb 10, 2009 07:57am | #5

   Have you tried the hardware stores?

2. 
   philip | Feb 10, 2009 08:04am | #6

   I am sure that we awl think that doubling the speed is going over the top...But you could probably get away with a 50% increase.Make sure you have a nice smooth running belt.
   Re bearing speeds- even 9000rpm is well within limits for greased bearings eg a 6203 max speed is 17000rpm or a 6205 bearing can run happily at 12000rpm (I quote from SKF bearing manual)Philip Marcou

   Edited 2/10/2009 12:10 am by philip

3. 
   oldusty | Feb 10, 2009 05:56pm | #7

   You can change the speed with different size pulleys as mentioned but in reality the one hp is 3 times the power needed a 1/2 hp motor is more then enough .

     More power is not a problem but imo running at too high of rpms right from the motor causes extra vibration in general even if you pulley it down it is not ideal. Imo  you would be better off with the correct motor and use the 1 hp for a larger demand use .  The time and cost to buy new sheaves and find a belt to fit and all may not be worth it for the level of  performance received .

         regards  dusty

1. 
   josefis | Feb 10, 2009 06:23pm | #8

   Again thanks for all the feedback. Great input from all. Before I go looking for a new motor I wanted to try the pulley change. Dusty you make some fine points regarding power, vibration, and rpm reduction. All things I'm taking in while experimenting with this baldor. I'm using a link belt so adjusting for pulley size change is pretty easy. I think I'll pull the stepped pulley off my lathe and use it before buying one. Didn't want to do it at the time I posted this but it's probably the best solution before investing any more money right now.I'll let you know what I discover. Joe

2. 
   josefis | Feb 12, 2009 02:08am | #9

   Well I stopped in grainger today and picked up a 3" pulley. Brought the speed down to around 5000 rpm. Jointed some walnut up real nice. Thanks to all for the feedback and help.