#RV reducers (4)

The Complete Robot Joint Module Selection Guide: Harmonic, Planetary, RV, Cycloidal & Quasi-Direct Drive — Vendor Research and Configurations by Robot Weight Class

How should robot joint modules actually be selected? Drawing on 200+ joint-module/reducer entries in the RobotWorld knowledge base, product research on leading vendors (Harmonic Drive, Nabtesco, Leaderdrive, Laifual, Leadshine, EYOBOT, ZeroErr, JIECANG, CubeMars, ENCOS), and item-by-item verification of the supply chains behind Tesla, Unitree, UBTECH, AgiBot and Fourier, this guide systematically compares harmonic, planetary, RV, cycloidal and quasi-direct-drive (QDD) transmission routes on performance and cost, provides a torque-tier product cheat-sheet (0.5-200 N·m) and full configuration recipes by robot weight class (small <=25kg / mid 30-55kg / large 60-100kg), plus a practical pitfall-avoidance playbook.

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Joint modulesHarmonic reducersPlanetary reducersQuasi-direct driveHumanoid robots

Qinchuan BX Series RV Reducer for Robotics

Qinchuan high-precision drive, a national manufacturing single-champion, offers BX RV reducers in E/C/F/N/integrated/GS series with 50+ sizes and 200+ ratios; rated torque 98 Nm (BX10C) to 265 Nm (BX27C), up to BX700F (~6.9 kNm).

COMPONENT

RV reducersQinchuanWorm GearReducers

Nabtesco RV Series Precision Cycloidal Reducers (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.

COMPONENT

RV reducersWorm GearPrecision reducersNabtescoIndustrial Robot Joint

Shuanghuan SHPR-E Precision Cycloidal (RV) Reducer

Huandong Technology, the robot-joint reducer arm of Shuanghuan Driveline, covers robots from 3 to 1000 kg payload. The SHPR-E precision cycloidal (RV) series' representative SHPR-20E offers a 57/56 ratio, 153 N.m output at 20 r/min, 412 N.m start-stop torque, 833 N.m peak torque, 1 arc.min backlash and 4.7 kg weight for industrial robot and automation joints.

COMPONENT

RV reducersCycloidal reducersJoint modulesDual Ring DriveHuanong Technology