Portable machining apparatus

A portable machining apparatus, comprising:

• a housing;
• an electric motor installed in the housing, the electric motor including a motor shaft extending in an axial direction;
• a tip tool partially or fully exposed outside the housing, the tip tool being rotatable by the electric motor;
• a controller installed in the housing and aligned with the electric motor in the axial direction, the controller being configured to control an operation of the electric motor;
• a first electric component and a second electric component installed in an electric component compartment between the controller and the electric motor, the first electric component and the second electric component being aligned in a same plane perpendicular to an axis of the motor shaft;
• and
• an internal support having a rectangular prism shape, the internal support positioning the first electric component and the second electric component relative to each other, the internal support including
• a first positioner which is a framed enclosure located at a first side of the internal support, wherein the first electric component is disposed inside the first positioner, and
• a second positioner which is a framed enclosure separate from the first positioner and is located at a second side of the internal support opposite to the first side so as to be aligned side-by-side with the first positioner, wherein the second electric component is disposed inside the second positioner in a removable manner.