The transmission structure of worm shaft is simple, compact, small volume and light weight.
Turn a round of worm gear teeth, can get a large transmission ratio.
Like big transmission ratio, if use with gear transmission, will need to take the multi-stage transmission.
material selection, carefully processing create product.
Set include one 0.5 modulus 5mm hole dia brass worm gear shaft and one 40 teeth brass worm gear wheel.