SOURCE: Porter Cable belt sander
try to rig the nozzle of a shop vac to the part where the bag would normally connect and run the sander simultaneously with vac for a few minutes and see if that helps
SOURCE: belt won't stay on belt sander
Check first that you have retensioned the belt... i.e. when you removed the other belt, you would have had to pull on a spring-loaded lever to remove the belt tension before you added the new one... make sure the tension lever is flipped back in to ensure the new belt is tensioned...
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.
That should stop your belt spinning off to one side.
SOURCE: Porter Cable 352V belt sander eats belts
I've never had any particular problems with norton belts. All belts will require some adjustment as they wear in,however.
Try this: Put a new belt on, turn the sander upside down and rest it on the front handle. Get a good grip on the rear handle and turn it on while you use your other hand to turn the tracking adjustment. Just center the belt on the drum. I don't know what the manual tells you to do, but that's what matters, that the belt rides across the platen without hanging out loose in space or running up against the housing of the machine. If it does ride in against the housing, and you don't track it away, eventually you'll have a groove worn right through the side of the machine.
If you try this, and it still doesn't work, make sure the drums are secure and look right. Is it possible the machine was dropped and the drum bent? If so, parts will have to be replaced.
The only other cause I can imagine is that there is some kind of something jammed inside the housing that is protruding into the belt pathway that they're getting caught on, but that seems unlikely. Check anyway. Look with a flashlight.
There are better belts available than Norton, but they should work.
Some belts have an arrow on the inside of the belt indicating the direction of travel. Make sure if yours does, that you put it on that way. I try to install them so the joint will tend to ride up over the work instead of the work tending to want to tear the joint apart, but this is not always obvious, depending on the mfr.
I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!
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
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