Angle grinders are versatile power tools used for cutting, grinding, and polishing metal, masonry, and other materials. A well‑maintained angle grinder generally lasts 5 to 10 years, but heavy use and harsh job sites can shorten this lifespan.
Average lifespan of an angle grinder
For DIY users and occasional professionals, a quality angle grinder can provide five to ten years of reliable service. Heavy‑duty industrial grinders may last longer with regular servicing. Budget models used frequently on demanding jobs may wear out within a few years.
What affects how long an angle grinder lasts
Continuous heavy loading, such as cutting thick steel or stone, overheats the motor and can burn out windings. Dust and debris entering the housing wear down bearings and gears. Using the wrong size or type of discs can strain the tool. Cordless models also depend on battery packs that degrade over time.
Signs an angle grinder needs replacing
A noticeable loss of power, unusual vibrations, or sparking around the brushes indicate internal wear. Excessive heat or burning smells during use suggest imminent failure. A damaged or cracked guard, grinding head play, or difficulty maintaining speed are other signals.
How to make an angle grinder last longer
Allow the tool to cool between extended cuts and avoid applying excessive pressure. Use correct discs rated for the speed of the grinder and secure attachments properly. Blow out dust and debris from the vents with compressed air after each use. Inspect and replace worn brushes, bearings, or cords.
When replacement is necessary
If the motor fails, or if the spindle and bearings are severely worn, replacement of the entire tool may be more economical than repair. Upgrading to a more powerful or safer model with features like automatic shutoff can improve productivity and safety.