Changing a sanding belt.

On most sanders, a belt change takes a minute. Handheld belt sanders, bench belt sanders, belt-and-disc sanders, edge sanders and belt files all follow the same pattern: release the tension, swap the belt, match the direction, tension it again and set the tracking. This page explains that pattern so your manual is easier to follow. Where your manual says something different, the manual is right.

Before you start.

• The right belt. The width and full loop length for your exact machine and configuration. Look up your machine.
• Your machine’s manual. Our machine pages link the manufacturer’s copy where we have one.
• A check of the new belt. Do not fit a belt that is torn, creased or has a lifting joint.

The usual sequence.

1. Make the machine safe. Switch it off and unplug it, or remove the battery. Wait until the belt has stopped completely.
2. Release the tension. Most sanders have a tension lever that moves one roller in. On some machines you first remove a guard or side cover.
3. Remove the old belt. Slide it off the side of the rollers. While it is off, clear dust from the rollers and, if your sander has one, check the flat plate behind the belt for wear.
4. Check the direction arrow. Most belts have an arrow printed on the back. Fit the belt so the arrow points the way the belt runs; many machines show that direction on the housing. On a belt with an overlapping joint, running it backwards can catch the joint and tear the belt. Belts without an arrow can usually run either way.
5. Fit the new belt. Slide it over the rollers, centred and square to them.
6. Tension it again. Return the tension lever or knob to its working position.
7. Set the tracking. Most sanders have a tracking knob that tilts one roller. Follow your manual’s procedure: usually you turn the belt by hand or run the sander briefly, watch which way the belt drifts and turn the knob a little at a time until the belt runs where the manual says, clear of the housing.
8. Close up and test. Refit any guard and the dust collection, reconnect the power and check the tracking once more on scrap material.

When a belt is due.

Change a belt when it no longer cuts, clogs or glazes and leaves burn marks, or when it is torn or the joint lifts. Store spare belts away from damp and heat, without kinks, so they stay flat and run true.