Structure features ：
1. Two types of housings: Aluminum alloy and cast iron; Aluminium alloy models: RV025 030 040 050 063 075 090; Cast iron models, RV 110 130 150.
2. Larger output torque.
3. Stable transmission with lower noise.
4. High heat-radiating efficiency.
5. Omnibearing installation available.
6. Reduction ratio:1:5---1:100 for single unit.