A: For low cost samples with quantity no more than 5pcs, we can provide them for free with freight paid by buyer (if clients can provide their courier account or arrange courier to pick them up from our company, it'll be okay with us). And for others, we'll charge sample cost and freight. It's not our aim to earn money by charging samples.
If it matters, we can make a refund once got the initial order.
Q: Is there a detailed lifetime for your motors?
A: A: I am afraid not. The lifetime varies a lot for different models, materials and the operating conditions like temp., humidity, duty cycle, input power, and how the motor or gear motor is coupled to the load etc. And the lifetime we normally mentioned is the time when the motor rotate without any stop and the current, speed and torque change is within +/-30% of the initial value. If you can specify the detailed requirements and working condition, we'll make our evaluation to see which one will be suitable to meet your needs.