... 2.low noise 3.transmission torque 1, four shaft level among decorate, add cent, reduce the material ... roller, completely through the steel nails in the shaft, not tighten appear roll;5, eight bearing can ... the service life of the bearing;6, driving shaft adopt bevel gear transmission design, low noise, transmission ... save the cost 500 yuan, and from the motor power limitations, but in the field in the operations ...