Most frequent questions and answers
There are two kind brushes that we normally use in motor: the metal brush and carbon brush. We choose based on speed, current, and lifetime requirements. For quite small motors, we only have metal brushes while for big ones we only have carbon brushes. Compared with metal brushes, the lifetime of carbon brushes are longer since it will reduce the wear on the commutator.
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.
Normally we define the noise level (dB) based on the back ground noise and measure distance. There are two kind noises: mechanical noise and electrical noise. For the former, it’s related to the speed and motor parts. For the latter, it’s mainly related to the sparks caused by the friction between the brushes and commutator. There is no quiet motor (without any noise) and only difference is the dB value.
For all of our motors, they are customized based on different requirements like lifetime, noise, voltage, and shaft etc. The price also varies according to annual quantity. So it’s really difficult for us to provide a price list. If you can share your detailed requirements and annual quantity, we’ll see what offer we can provide.
For normal dc motor samples, the lead time is around 10~15days and for gear motor samples, it’ll be 15~20days. If there is special requirements like extended shaft, special reduction ratio, lead time will be longer. For orders, the standard lead time is 35days and this time can be shorter or longer based on different model, period and quantity.
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.
It depends. If only a few samples for personal use or replacement, I am afraid it’ll be difficult for us to provide because all of our motors are custom made and no stock available if there is no further needs. If just sample testing before the official order and our MOQ, price and other terms are acceptable, we’d love to provide samples.
Normally we recommend the motors based on the size constraints like diameter, length, width, the shaft diameter, rated voltage, no load speed and stall torque or on load speed and on load torque, lifetime requirements and noise level etc. And different motors might be needed for the same application if with different design. If you can send us a picture of your sample with size information, your existing spec or the detailed requirements we mentioned above, we’ll see what we can do. The more information you provide; the better for us to provide what you exactly need.
Sure. But please kindly keep us posted a few days in advance. We need to check our schedule to see if we are available then.
We don’t have any subsidiary oversea but we will consider that in the future. We are always interested in cooperating with any worldwide company or individual who would be willing to be our local agents to serve our customers more closely and efficiently.