Question about Dewalt DW433KT Heavy Duty 8 Amp 3 Inch By 21 Inch Variable Speed Belt Sander Kit With Dust Canister, Case, And Inversion/Sanding Frame

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The belt slips off my Belt Sander

When I operate my belt sander, the belt rides off. I have engaged the lever to tighten the belt. Is there something else I need to do?

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All sander will have two adjustments. The first is to release the sanding belt by retracting the position of one of the rollers. The second adjustment moves one of the rollers belt tension from side to side. The roller angular position is changed, sometime by a single knob or screw, and sometimes by two separate adjusting screws.

Posted on Jun 19, 2009

  • Nancy Branath
    Nancy Branath Aug 12, 2013

    ive tried that. i have tighened the knob all the way and the rollers are unchanged. the front roller has a lot of play in it and the belt moves around.

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Next, and the likely problem you are having, is belt tracking... There should be an adjustment knob up near the front of the sander near the front roller, either on top of the front part of the sander, or to the side near the front roller... When you turn this knob, it makes the belt track either left or right over the sander's base. This knob will allow your belt to run square and true and not spin off to one side...You need to adjust the tracking using this knob while the belt sander is running and with the new belt tensioned and in place, so turn the sander upside down, and power it on with one hand, then turn the knob with the other hand whichever way is needed to have the belt track square and in the middle of the rollers. Make small adjustments on the tracking knob to begin with. They can be sensitive at times.

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1 Answer

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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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