Hi Paul,
Yes these tools definitely aren't made with any sort of longevity figured into the design or manufacturing processes.
How much would a tool like this cost to purchase?.
I'm guessing that it's one of the very cheap brands, like the one's here that have popped up at our supermarkets.
I've never thought of buying an Electric Drill with my groceries.
But generally they are priced under NZ$20 and as the old saying goes "You gets whats you pays for".
Paul I take it this is a Double-Insulated Appliance, but in the bottom pic there is a screw holding a wire and terminal to the outer part of the motor "body".
This obviously isn't for any kind of earthing is it?.
Going by the brushes and the commutator, the brushes aren't applying equal and even pressure on the commutator either.
I wouldn't personally use a tool of this particular quality for very long in one spell, it may melt in your hands, given the large amount of plastic in it's construction.