Figure 19-4. Two ways to store sanding belts. Don't allow them to kink or become dirty.
Abrasive belts are available in three grits: coarse, medium, and fine. The belt sander accepts abrasive belts 6" wide by 48" long. Often, there are slight inconsistencies from belt to belt; some are slightly longer than 48", some shorter. The automatic belt tensioning feature compensates for this. There's no need for you to readjust the distance between the drums every time you change a belt, unless you use a nonstandard belt.
The grit you choose depends on the work you have to do. Remember that for the smoothest surface possible, always work your way from coarse to fine grits.
Belts should be carefully stored by using one of the methods shown in Figure 19-4.