Some solid state devices made for 60 Hz may survive on 50 Hz, but anything with a AC motor is trouble. Printer cooling fan and computer power supply fan come to mind. This is different than the DC run electronics. As YVR Cockroach has noticed, small battery chargers are almost all 110-220 volt and 50/60 cycle. Why? These things are made in China and shipped all over the world. For the tiny extra cost of make it dual, the manufacturer only has to make one model power supply and ship it with every product they make, instead of "this shipment is going to the US, make sure the 110 volt units get packed in these boxes."

Less amps is drawn due to the higher voltage, but if the motor is not built for the lower frequency, and assuming the voltage is correct (selector switch repositioned, or in some cases the motor rewired), a 60 Hz motor will try to pull the same power and the amp draw will be higher on 50 Hz. This can pop the circuit breaker. If the motor does run, it will run hotter, after a while it can get so hot it pops its internal thermal protector if it has one. Worse, most cooling fan motors rely on the air over them for cooling. On 50 Hz most motors will run at 5/6 the speed they do on 60 Hz, resulting in less cooling air flow over the overheating motor and less cooling for the machine. Not good for long life but great for starting fires.