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Belt slipping I have a Ryobi 4x36 Belt/Disc Sander, Model BD4600. Even with a new belt, it slips or stops as soon as a piece of wood touches it. The yellow gear on the right changes the position of the belt, but does nothing to tighten it. I don't see any kind of adjustment to move the two rollers further apart to tighten the belt. There is a screw inside the lever mechanism that allows you to change the belt, but it doesn't seem to have any relationship to make the needed adjustment. The solution?

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  • Anonymous May 09, 2009

    I have exactly same problem! Ryobi sander again. I had a cheapo Challenge one before this one and it worked like a donkey until I finally got it so hot the motor heat melted the plastic drive cogs for which I couldn't get spares. Subsequently paid twice as much for a supposedly superior brand (that I was told I could get spare parts for). Despite changing belts it soon starts slipping at the slightest pressure. Having read comments of possible causes, I can confirm I am not using excess (hardly any!) pressure, I have tried both deglazing belt rollers and inside of belt for good measure. The rollers simply need to be tensioned in my view but there doesn't appear to be a way to do this. I've looked at the manual and there is nothing about increasing tension beyond the set pre-tension lever. As far as I can tell the spring tension is still there.

    Any thoughts?

  • Thomas F. Schneider May 11, 2010

    Ryobi requires one to register for online support.


    All of the belt sanders that I have ever used have a spring mecanism to tighten the belt by a release lever that springs one of the wheels tightly against the belt. 




    http://www.ryobitools.com/products

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Because of build up heat the bearings and force will made that the center distance between the axle-bearings slowly comes to lie closer to each other, thats give by much belt sanders the same problem where bearings become dry and dirty it will tiny melt the bearings out of centerpoints of the housing if bought new measure and after a while measure the distances again and look remarkable and that will be the first problem if there is a medium pressure load by working maybe not but much people are working prolonged for that kind of tools .

Posted on Nov 16, 2016

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I have a Ryobi sander with a belt slipping issue as well. The problem seems to be in the design, not on the user end. The drive barrel is made of a semi-hard, non-gripping material. Wood dust becomes a final release agent that breaks any grip that the barrel may have had.
To compound the problem, the more the belt slips the smother the underside becomes allowing for greater slippage.
I now know why this model was the least expensive unit. >.<

Posted on Jul 11, 2009

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Posted on Jan 02, 2017

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Hop this helps

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Hi, Consult your user manual for the instructions to install a new belt.  Follow these instructions selectively to tighten the belt tension. Here they are....  
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  Using a phillips head screwdriver, reinstall the pulley cover
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Good Luck!  Middles

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