1: high precision, single stage up to 3 arc points, bipolar arc can be up to 5 points.
2: helical can increase the flange match, take more torque (90 with 1-2 kw motor)
3: adopt high strength alloy steel, whole gear after hardening treatment, not only the surface hardening, ensure the service life of use for a long time still keep the original precision
4: noise below 65 db
5: single sections of work efficiency over 97%, double stages in more than 95%