SECRET ABOUT COILED MACHINES:
COIL IS THE MOST IMPORTANT PART OF ANY ELECTRONIC WHICH PROVIDE THE CURRENT and regulates it. therefore the quality of the coil determines the temperature(hot or cool) and durability when using it. there are 3 common types of coil specifically for grinder/blenders which includes;

(A)PURE COPPER coil WIRE IS THE BEST BECAUSE IT
> EXCELLENT CONDUCTIVITY & POWER EFFICIENT
> RUNS COOLER(LESS HEAT BUILDUP)
> longer lifespan and less likely to burn out.

(b)ALUMINUM COIL HAS LESS QUALITY, HEAT UP FASTER, BURNS OUT EASILY WITH HEAVY DUTY LOADS.

(C) copper-clad aluminum has less quality because is coated with thin copper wire, has less capacity, mostly uses in these regular blenders.