20 Most Recent Black & Decker BR300 3''x18'' Belt Sander Questions & Answers

To change belt:
1) Put front roller on floor and push down until roller locks back.
2) Put on new sand paper.
3) Loosen tracking screw until front roller is released.
4) With sander running, use tracking screw to center belt.

The belt from Jason 110XL031 is Identical in size and apperance.

The front roller (usually a metal cylinder) is spring loaded. The rear roller (usually a rubber cylinder) is fixed and is driven by a belt from the motor. You need to push the front roller against a fixed object (like a benchtop) pretty hard to compress the spring about 1/2 inch. It should "catch" in the compressed position. Belt will now be loose and easy to reeplace. Then, to "un-catch" it, on most models, just stick a screwdriver behind the front roller bracket and pry it forward. It should pop right back into place. Good luck.

On the side of the sander there is a black triangle shaped cover with 3 screws holding it in place. Remove the screws and you will see the drive belt and 2 pullies or gears. The belt will be attached to the gears. Remove and replace the belt. Typically the belt is broken so the only thing you will need is to locate a new belt and slip in over the gears with the side with the teeth facing the gears. This keeps the belt from slipping. Reinstall the cover and you are ready to go back to work. The hardest part may be finding a supplier for the belt.

Hi Anthonyk,

The view of the b&d br300 I saw was rhat the sanding belt goes automaticly.Maybe you need to check the system or try to telephone local shop where you bought it .

Greatings from holland

Appie

You might try Dewalt. I have a Black & Decker weed eater that had a broken belt and I had to order it from Dewalt. I was told that they had some kind of merger. Ordered it and it worked just fine.

if you do not find it, you could change one of the pulleys, with one of greater size, of course this will affect the speed, but is an alternative.

The drive from the motor to the rollers is broken. You will have to replace that belt if available.

Look between the rollers that the sandpaper belt travel on. You will find a lever which can be released. Once you release it, you can pull the old belt off and slip the new belt on. Place the release lever back the way it was and you are done.

theres a adjustment screw on the side to adjust so it wont move side to side

If it smoked, then it's probably toast. These only cost about 70.00 hard to repair at that price.