Why Do My Sanding Belts Keep Breaking?

• Incorrect Manufacturing process

When belt joints are manufactured incorrectly, they can break. The manufacturer may not have used the correct heat setting when pressing the belts together to harden the belt, glue, and backing. Alternatively, the belt may not have been scuffed properly before gluing, meaning that a small part of the joint has not been sanded down to ensure a good bond.
If a large number of belts from the same manufacturer break during use, it may be that a manufacturer's error is at the root of the problem. MOOSEFOS will provide our customers with a guarantee to replace your sanding belt with a new one in case of breakage.

• Too much pressure on the belt sander during use

If you use your belt sander with too high or too low a tension pressure, you may experience tracking problems, belt bending, belt tearing, and joint failure.

• Belt is not running in the right direction

The recommended direction of the belt should be checked before use. If your belt joint is unidirectional, you need to make sure the belt is traveling in the correct direction or it will break at the joint.

• Overloading

If your belt popped, it might have been due to excessive loading of the material being sanded. Sometimes, particles trapped in the machine, or a significant variation in the thickness of the workpiece to be sanded, exert too much pressure and cause the belt to snap. In this case, take steps to minimize the load during sanding.

• Improper temperature control during storage

Well-maintained abrasive belts can last one or two years if stored away from humidity, condensation, excessive cold, or heat. All these factors can contribute to joint deterioration, so belts should be stored in a climate-controlled environment.

• Workpiece defects

Belts can break if the part to be sanded has a nail, staple, or other imperfection protruding from the surface. You should inspect your workpieces before sanding to make sure they are free of any parts that could catch and tear the belt.