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Loose sanding belt

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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  • 58 Answers

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....  
CHANGING DRIVE BELT


  Using a phillips head screwdriver, remove the two screws
in the center of the pulley cover.
  Remove the cover.
  Raise sanding belt to the vertical sanding position.
  Next, loosen the hex head set screw. Raising the motor
pulley releases the belt tension.
  Remove the old drive belt.
  Fit the new drive belt on the drive pulley first and then on
the motor pulley.
  Test belt tension by squeezing the belt with your fingers.
  Adjust the belt tension with the hex head set screw until
there is about 1/4 in. (6 mm) of give.
  Tighten the belt tension nut securely.
Note: Excessive tightness on the drive belt may cause
increased noise and overload the motor. Excessive
looseness on the drive belt may cause the drive belt to
fail prematurely and make a severe chattering noise.
  Using a phillips head screwdriver, reinstall the pulley cover
and the two phillips head screws. Tighten securely.


Good Luck!  Middles

Posted on Jan 08, 2009

3 Suggested Answers

comax
  • 154 Answers

SOURCE: Sanding Belt Slips Badly

Check and see if the pulleys on the sander are not glazed this somtimes will cause the belt to slip. Give them a good cleaning. If this does not help there is a good chance the spring on the belt tensioner is weak and need changed.

Hop this helps

Posted on Apr 14, 2009

  • 1 Answer

SOURCE: Belt slipping

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

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Check and see if the pulleys on the sander are not glazed this somtimes will cause the belt to slip. Give them a good cleaning. If this does not help there is a good chance the spring on the belt tensioner is weak and need changed.

Hop this helps

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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. >.<

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