What Are the Common Faults When an Angle Grinder Fails to Rotate?
3 Answers
Common faults that may cause an angle grinder to stop rotating include: power disconnection; loose or detached connectors; poor switch contact; lack of contact between the brushes and commutator surface; burnt switch contacts; mechanical jamming. Below is relevant information about angle grinders: Usage Tips: Before use, always check whether the angle grinder has a protective cover, whether the cover is secure, and whether the grinding disc is properly installed. Precautions: It is strictly prohibited to use damaged grinding discs. During cutting, prevent sparks from scattering to avoid harming others and keep away from flammable and explosive materials. Always wear protective goggles and appropriate work clothing. Avoid loose-fitting clothing, do not wear jewelry, and tie back long hair. Never operate the grinder while wearing gloves or with unbuttoned cuffs.
I've been repairing angle grinders for over a decade, and found that common issues causing them not to spin mainly fall into several categories: power supply problems like loose plugs, damaged wires, or tripped household fuses; switch failures where buttons get stuck or internal contacts wear out, blocking signal transmission; more deeply, carbon brush wear is a frequent issue—they turn black and shorten with use, requiring replacement with a new pair; then there's seized bearings inside the motor due to dirt blockage or rust, necessitating disassembly for cleaning and lubrication; overheating protection activation also counts, where the machine shuts down automatically when overworked. Regular maintenance is advised—wiping off dust after each use, checking wiring every six months—don't wait for breakdowns to fix. These basic troubleshooting methods can help most people solve issues quickly, avoiding professional repair costs.
As a home DIY enthusiast, I've summarized some troubleshooting tips when my angle grinder stops working: The most common issue is a loose power cord, where an improperly secured plug interrupts the current; switch aging is also frequent, with unresponsive buttons requiring reinstallation or replacement; another culprit is severely worn carbon brushes—after several uses, poor contact occurs, but installing new inexpensive brushes solves it; other possibilities include machine overload causing it to overheat (just let it rest) or dust-clogged bearings jamming the mechanism. My routine before use includes checking plugs and testing switches to prolong tool life. Always unplug for safety during repairs and wear protective gear just in case—these small tricks have saved me much trouble.
