NOSEN Spiral Bevel Gearbox, RN Series, is case-harden and it is of high rigidity and wear resistance. For Model RN-4M, the biggest torque it can transmit is 43N.m, with normal ratio 1:1 or 1:2 for your choice. Other ratio can be customized. Rated power up to 4.9KW. It has 42 kinds of transimission directions. You can consult to us for your application and we will offer you proposal for free.