A brushless angle grinder consists of several precision components working together. Its core components include:
1. Motor: A brushless DC motor boasts 20%-30% higher efficiency than brushed motors (source: Bosch Technical White Paper), a longer lifespan, and requires no carbon brush maintenance.
2. Gearbox (front): Located at the front of the grinder, it houses a planetary gearset and converts the motor's high speed (typically 20,000-12,000 RPM) into torque suitable for grinding. The housing is typically made of aluminum alloy for heat dissipation.
3. Output Shaft and Chuck: Directly connects to the grinding or cutting disc. The standard shaft diameter is M10 or M14 (common on professional-grade models).
4. Cooling System: Includes cooling fins and a fan to ensure the unit temperature does not exceed 60°C during extended operation (according to DEWALT testing).
5. Electronic Control System: An integrated PCB provides speed regulation, overload protection, and battery level display.
