Nabtesco RV Series Precision Cycloidal Reducers (RV-E / RV-C)
Vendor: 纳博特斯克 Nabtesco
Product: RV 系列摆线针轮精密减速器（RV-E / RV-C）
Nabtesco (Japan) invented and dominates the RV cycloidal reducer used in industrial robots. The RV series uses two-stage reduction (involute center gear plus cycloidal pin stage) with an integrated angular ball main bearing: RV-E spans sizes 6E-450E and RV-C 10C-500C, rated torque 72-4,410 N·m (RV-E) and 98-4,900 N·m (RV-C) at 15 r/min output, ratios 31-192, lost motion under 1 arcmin and shock capacity of 5x rated torque, the de-facto standard for heavy industrial robot joints.
| type | RV cycloidal (two-stage) precision reducer, integral angular ball bearing |
| models | RV-E: 6E/20E/40E/80E/110E/160E/320E/450E; RV-C: 10C/27C/50C/100C/200C/320C/500C |
| backlash | lost motion <1 arcmin |
| structure | two-stage: involute center gear + cycloidal pin stage; crankshafts supported both sides |
| applications | industrial robot joints (base/shoulder axes), machine tools, factory automation |
| main_bearing | integrated angular contact ball bearing (high moment rigidity) |
| rated_torque | RV-E 72-4,410 N·m; RV-C 98-4,900 N·m @15 r/min output |
| shock_capacity | 5x rated torque (momentary) |
| reduction_ratio | RV-E 31-192.4; RV-C base 27-37.3 (overall per configuration) |