Belt sanding belts are made with an overlapping joint. Because of this, it’s important to fit the belt in the right direction, otherwise it’ll break at the join during use.
On the inside of every belt, you’ll see directional arrows. Simply fit the belt in the same direction as he arrows on the side of the tools. The position of the arrow will vary between models.
To fit or replace the belt, unplug the power cord if you have an AC model, or if you have a cordless one, remove the battery.
Then take the tension off the belt, by pulling back the tensioning lever and sliding the old belt out.
Position the belt roughly in the centre of the metal back plate, and push the tensioning lever in.
At this stage, the belt should fit firmly on the rollers. Once the belts fitted, it needs to be aligned on the rollers, by adjusting the tracking. This ensures the sanding belt doesn’t come off during use.