Replies

1. 
   forestgirl | Mar 11, 2003 08:05am | #1

   Trig (may I call you Trig?), you should be able to find the part on-line at Sears:

   http://www3.sears.com/

   However, you need the exact model of the jointer, e.g., if there's a letter in the model number.  I plugged in your number and didn't get anything.

   If that doesn't work, I'm sure one of our engineering WWers will help figure it out.

   BTW, I'm in the Northwest and can identify with being "palethera"  ROFL!  Please, I'm not making fun, I love spelling mistakes and typos.  Hope our plethora can help you out!

   forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl   ;-)

1. 
   TRIGGER | Mar 11, 2003 08:55am | #2

   I just switched to tew fingers, so be patient with my spelling. Way too much concentration involved here. At least i'm up to 3 werds per min. now.

   It says model # 133.20551 only. Thanks for the effort duplication though.

                                             Hiyo Triggerski !!!

2. 
   JamesPutnam | Mar 11, 2003 09:25am | #3

   Probably not an exact science here but a 5000 RPM cutter would be typical. For that, drive the 2" pulley (on the cutter shaft ) with a 3" pulley on the motor and you'll have a cutter no-load speed of about 1.5 times the 3450 RPM motor speed - just over 5000 RPM. For the formula, divide the motor pulley diameter by the driven pulley diameter - multiply that number times the motor speed - and you've got the driven shaft speed. For a couple of techincal reasons having to do with the characteristics of 'V' belts this won't be exact, but will be pretty close.

1. 
   TRIGGER | Mar 11, 2003 11:02am | #4

   So if I find a 3" For the driven, and 4.5" for the motor, I'll get the same results, right? 1.5 x 3450 = 5173 rpm.

   Interesting that you can convert diameter to circomfrence and  it equals the same result.

   Should get more tracksion with larger diameter pullys, any drawbacks?

    5173 rpm will work with 1/2 hp motor? I'll try it and report back if I have problems. Weighing each knife for equality will help keep things balanced? , or too much overkill?

1. 
   JamesPutnam | Mar 11, 2003 06:49pm | #6

   Exactly - it's the ratio between the sizes of the pulleys. You could use a 2" and 3" pulley, or a 3" and 4.5" combination - or a 6" and 9" pair. I think that the 3"/4.5" set would be just about right for transmitting 3/4 to 1 HP. Balancing the knives seems more than you'd need to get started, but I'm no expert on fine tuning a jointer, maybe others have some experience to share in this area.

   ......I just went to my shop to check my 6" Sunhill jointer, and it has a 3.5" diameter pulley on the motor, driving a 2.5" pulley on the cutter shaft - just under 5,000 RPM. It's also a 1/2" belt and the pulleys are steel, which I prefer because the aluminum ones seem to wear so easily.

1. 
   UncleDunc | Mar 11, 2003 07:03pm | #7

   And the larger the pulleys, the longer your belts will last, because they don't have to make such a sharp bend to get around the pulley.

1. 
   TRIGGER | Mar 12, 2003 09:23am | #8

   Thats all very good stuff, thank you.

                        Hiyo,Triggerski!!

2. 
   LeeEschen | Mar 12, 2003 10:20am | #9

   You might investigate the new link belts, available from almost any woodworking tools supplier by the foot. They greatly reduce vibration and last much longer to boot.

   --

   Lee in Cave Junction, Oregon

   Gateway to the Oregon Caves

3. 
   TKanzler | Mar 11, 2003 02:33pm | #5

   Take a look at this catalog page, and see if it looks like yours.  For this model, the 2" diameter pulley goes on the arbor, with a 2 1/2" diameter on the motor, for a loaded speed of about 4300 rpm (no-load will be almost 4500 rpm).  You could also use a 5" diameter on an 1800 rpm motor with the same result.  With a 1/2 hp or so motor, you don't need pulleys any larger than that. 

   Edit: It would probably help to give you the link.  Look at page 8 of 16.  http://files.owwm.com/PDF/Craftsman/1966-Catalog.pdf

   Be seeing you...

   
   

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   Edited 3/11/2003 7:40:16 AM ET by Tom Kanzler