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A DCA 4-inch armature is the rotating core (rotor) used in a 4-inch angle grinder from DCA (Dongcheng Tools). It’s a critical replacement part when your grinder loses power, sparks excessively, or burns out.
Key Details
Tool size: 4-inch (100mm) angle grinder
Function: Converts electrical energy into mechanical rotation
Material: Copper windings + laminated steel core
Shaft size: Usually ~10mm (varies slightly by model)
Voltage compatibility: Typically 220–240V grinders
Common DCA Models Using 4” Armature
DCA ASM02-100
DCA ASM03-100
DCA SIM-100A
(Important: Always confirm your exact model before buying — DCA parts are not always interchangeable.)