RV-EM Series RV Reducers – Lightweight, High-Impact-Resistant Gearboxes for Robotic Arms

Product Overview

The RV-EM Series RV Reducers are specifically engineered for robotic arms and precision automation systems, combining a lightweight, slim-profile body with enhanced impact resistance and high-precision torque transmission. By reducing the inertia in robotic arm transmissions, the RV-EM Series ensures exceptional positioning accuracy, smooth motion, and reliable dynamic response, making it ideal for industrial robots, CNC machines, automated assembly lines, and other high-performance applications.

Unlike traditional planetary gear reducers, which often suffer from low meshing efficiency and limited impact resistance, the RV-EM Series employs a needle gear mechanism that significantly improves the meshing rate and durability under sudden loads or shocks. This design ensures that the reducer can withstand unexpected mechanical impacts, such as emergency stops or operational confrontations, without compromising device reliability or longevity.

The RV-EM Series RV Reducer is also optimized for compact layouts. Its slim and lightweight construction reduces the mechanical footprint while maintaining high torque capacity. By minimizing mass and inertia in the robotic arm, the reducer improves energy efficiency and enhances the dynamic responsiveness of high-speed movements, which is critical in automated production systems.

Furthermore, the RV-EM Series RV Reducer incorporates a highly reliable gear structure, ensuring that even under heavy loads, sudden stops, or emergency shutdowns, the reducer maintains its structural integrity and consistent performance. The combination of needle gear engagement, high meshing rates, and impact resistance makes it an ideal choice for applications where reliability and precision are equally important. The RV-EM Series RV Reducer enables engineers and designers to maximize system performance, ensure operational reliability, and simplify integration, making it a preferred solution for high-performance robotics and industrial automation.

Key Features

  • Enhanced Needle Gear Mechanism
    Improves meshing rate and torque transfer efficiency.
    Provides high impact resistance, ensuring the reducer withstands operational shocks and emergency stops.
    Multiple simultaneous engagements between needle gears and RV gears increase durability.
  • Lightweight, Slim Profile
    Reduces inertia in robotic arm transmissions.
    Ideal for tight installation spaces in industrial robots and automated machinery.
    Improves dynamic responsiveness and energy efficiency.
  • High Reliability and Structural Integrity
    Maintains performance under sudden impacts or mechanical confrontations.
    Minimizes the risk of reducer damage during emergency stops or operational interruptions.
    Ensures stable and consistent torque output even in demanding applications.
  • Compact Installation & Layout Flexibility
    Slim housing allows integration into robotic arms and machinery with limited space.
    Supports optimized cable routing and mechanical layouts, reducing system complexity.
  • Durable, Long-Life Construction
    Precision-engineered components reduce wear and extend operational lifespan.
    Needle gear engagement ensures low backlash, precise motion, and smooth torque transmission.
    High-quality materials and manufacturing processes enhance reliability in high-speed and heavy-load conditions.

Technical Information

ModelRatio CodeReduction Ratio (Shaft Rotation)Reduction Ratio (Case Rotation)Output Torque (N·m)/Input Capacity (kW) @5 rpmOutput Torque (N·m)/Input Capacity (kW) @10 rpmOutput Torque (N·m)/Input Capacity (kW) @15 rpmOutput Torque (N·m)/Input Capacity (kW) @20 rpmOutput Torque (N·m)/Input Capacity (kW) @25 rpmOutput Torque (N·m)/Input Capacity (kW) @30 rpmOutput Torque (N·m)/Input Capacity (kW) @40 rpmOutput Torque (N·m)/Input Capacity (kW) @50 rpmOutput Torque (N·m)/Input Capacity (kW) @60 rpm
RV-6EM313130101/0.0781/0.1172/0.1566/0.1962/0.2258/0.2554/0.3050/0.3547/0.40
RV-6EM434342101/0.0781/0.1172/0.1566/0.1962/0.2258/0.2554/0.3050/0.3547/0.40
RV-6EM53.553.552.5101/0.0781/0.1172/0.1566/0.1962/0.2258/0.2554/0.3050/0.3547/0.40
RV-6EM595958101/0.0781/0.1172/0.1566/0.1962/0.2258/0.2554/0.3050/0.3547/0.40
RV-6EM797978101/0.0781/0.1172/0.1566/0.1962/0.2258/0.2554/0.3050/0.3547/0.40
RV-6EM103103102101/0.0781/0.1172/0.1566/0.1962/0.2258/0.2554/0.3050/0.3547/0.40
RV-20EM575756231/0.16188/0.26167/0.35153/0.43143/0.50135/0.57124/0.70115/0.81110/0.92
RV-20EM818180231/0.16188/0.26167/0.35153/0.43143/0.50135/0.57124/0.70115/0.81110/0.92
RV-20EM105105104231/0.16188/0.26167/0.35153/0.43143/0.50135/0.57124/0.70115/0.81110/0.92
RV-20EM121121120231/0.16188/0.26167/0.35153/0.43143/0.50135/0.57124/0.70115/0.81110/0.92
RV-20EM141141140231/0.16188/0.26167/0.35153/0.43143/0.50135/0.57124/0.70115/0.81110/0.92
RV-20EM161161160231/0.16188/0.26167/0.35153/0.43143/0.50135/0.57124/0.70115/0.81110/0.92
RV-40EM575756572/0.40465/0.65412/0.86377/1.05353/1.23334/1.40307/1.71287/2.00271/2.27
RV-40EM818180572/0.40465/0.65412/0.86377/1.05353/1.23334/1.40307/1.71287/2.00271/2.27
RV-40EM105105104572/0.40465/0.65412/0.86377/1.05353/1.23334/1.40307/1.71287/2.00271/2.27
RV-40EM121121120572/0.40465/0.65412/0.86377/1.05353/1.23334/1.40307/1.71287/2.00271/2.27
RV-40EM153153152572/0.40465/0.65412/0.86377/1.05353/1.23334/1.40307/1.71287/2.00271/2.27
RV-80EM5757561088/0.76885/1.24784/1.64719/2.01672/2.35637/2.67584/3.26546/3.81517/4.33
RV-80EM8181801088/0.76885/1.24784/1.64719/2.01672/2.35637/2.67584/3.26546/3.81517/4.33
RV-80EM1011011001088/0.76885/1.24784/1.64719/2.01672/2.35637/2.67584/3.26546/3.81517/4.33
RV-80EM1211211201088/0.76885/1.24784/1.64719/2.01672/2.35637/2.67584/3.26546/3.81517/4.33
RV-80EM1531531521088/0.76885/1.24784/1.64719/2.01672/2.35637/2.67584/3.26546/3.81517/4.33
RV-110EM8181801499/1.051215/1.701078/2.26990/2.76925/3.23875/3.67804/4.49––
RV-110EM1111111101499/1.051215/1.701078/2.26990/2.76925/3.23875/3.67804/4.49––
RV-110EM1611611601499/1.051215/1.701078/2.26990/2.76925/3.23875/3.67804/4.49––
RV-110EM1751227/71220/71499/1.051215/1.701078/2.26990/2.76925/3.23875/3.67804/4.49––
RV-160EM8181802176/1.521774/2.481568/3.281441/4.021343/4.691274/5.34–––
RV-160EM1011011002176/1.521774/2.481568/3.281441/4.021343/4.691274/5.34–––
RV-160EM1291291282176/1.521774/2.481568/3.281441/4.021343/4.691274/5.34–––
RV-160EM1451451442176/1.521774/2.481568/3.281441/4.021343/4.691274/5.34–––
RV-160EM1711711702176/1.521774/2.481568/3.281441/4.021343/4.691274/5.34–––
RV-320EM8181804361/3.043538/4.943136/6.572881/8.052695/9.412548/10.70–––
RV-320EM101.5101.5100.54361/3.043538/4.943136/6.572881/8.052695/9.412548/10.70–––
RV-320EM118.5118.5117.54361/3.043538/4.943136/6.572881/8.052695/9.412548/10.70–––
RV-320EM1291291284361/3.043538/4.943136/6.572881/8.052695/9.412548/10.70–––
RV-320EM1411411404361/3.043538/4.943136/6.572881/8.052695/9.412548/10.70–––
RV-320EM1711711704361/3.043538/4.943136/6.572881/8.052695/9.412548/10.70–––
RV-320EM1851851844361/3.043538/4.943136/6.572881/8.052695/9.412548/10.70–––
RV-450EM8181806135/4.284978/6.954410/9.244047/11.33783/13.2––––
RV-450EM1011011006135/4.284978/6.954410/9.244047/11.33783/13.2––––
RV-450EM118.5118.5117.56135/4.284978/6.954410/9.244047/11.33783/13.2––––
RV-450EM129.5129.5128.56135/4.284978/6.954410/9.244047/11.33783/13.2––––
RV-450EM154.8154.8153.86135/4.284978/6.954410/9.244047/11.33783/13.2––––
RV-450EM1711711706135/4.284978/6.954410/9.244047/11.33783/13.2––––
RV-450EM1921921916135/4.284978/6.954410/9.244047/11.33783/13.2––––
ModelRatio CodeRated Torque (Tr) (N·m)Rated Output Speed (Nr) (rpm)Rated Service Life (L₁₀) (h)Allowable Start/Stop Torque (Tsi) (N·m)Momentary Maximum Allowable Torque (Ts2) (N·m)Maximum Allowable Output Speed (Nso) (rpm)Backlash (B) (arcsec)Lost Motion MAX. (arcmin)Angular Transmission Error MAX. (arcsec)Startup Efficiency (Typical Value) (%)Allowable Moment (Mo1) (N·m)Momentary Allowable Moment (Mo2) (N·m)Allowable Radial Load (Wr) (N)Inertia Moment (Reduced to Input Shaft) (kg·m²)Weight (kg)
RV-6EM31583060001172941001.51.5807019639221402.63×10⁻⁶2.5
RV-6EM43583060001172941001.51.5807019639221402.00×10⁻⁶2.5
RV-6EM53.5583060001172941001.51.5807019639221401.53×10⁻⁶2.5
RV-6EM59583060001172941001.51.5807019639221401.39×10⁻⁶2.5
RV-6EM79583060001172941001.51.5807019639221401.09×10⁻⁶2.5
RV-6EM103583060001172941001.51.5807019639221400.74×10⁻⁶2.5
RV-20EM57167156000412833751.01.07075882176477859.66×10⁻⁶4.7
RV-20EM81167156000412833751.01.07075882176477856.07×10⁻⁶4.7
RV-20EM105167156000412833751.01.07075882176477854.32×10⁻⁶4.7
RV-20EM121167156000412833751.01.07075882176477853.56×10⁻⁶4.7
RV-20EM141167156000412833751.01.07075882176477852.88×10⁻⁶4.7
RV-20EM161167156000412833751.01.07075882176477852.39×10⁻⁶4.7
RV-40EM5741215600010292058701.01.0608516663332115943.25×10⁻⁵9.3
RV-40EM8141215600010292058701.01.0608516663332115942.20×10⁻⁵9.3
RV-40EM10541215600010292058701.01.0608516663332115941.63×10⁻⁵9.3
RV-40EM12141215600010292058701.01.0608516663332115941.37×10⁻⁵9.3
RV-40EM15341215600010292058701.01.0608516663332115941.01×10⁻⁵9.3
RV-80EM5778415600019603920 (Bolt Fastening Only)701.01.050852156 (Bolt Fastening Only)4312 (Bolt Fastening Only)12988 (Bolt Fastening Only)8.16×10⁻⁵13.1
RV-80EM8178415600019603920 (Bolt Fastening Only)701.01.050852156 (Bolt Fastening Only)4312 (Bolt Fastening Only)12988 (Bolt Fastening Only)6.00×10⁻⁵13.1
RV-80EM10178415600019603920 (Bolt Fastening Only)701.01.050852156 (Bolt Fastening Only)4312 (Bolt Fastening Only)12988 (Bolt Fastening Only)3.96×10⁻⁵13.1
RV-80EM12178415600019603920 (Bolt Fastening Only)701.01.050852156 (Bolt Fastening Only)4312 (Bolt Fastening Only)12988 (Bolt Fastening Only)2.98×10⁻⁵13.1
RV-80EM15378415600019603920 (Bolt Fastening Only)701.01.050852156 (Bolt Fastening Only)4312 (Bolt Fastening Only)12988 (Bolt Fastening Only)2.84×10⁻⁵13.1
RV-110EM81107815600026955390501.010.0508529405880166489.88×10⁻⁵17.4
RV-110EM111107815600026955390501.010.0508529405880166486.96×10⁻⁵17.4
RV-110EM161107815600026955390501.010.0508529405880166484.36×10⁻⁵17.4
RV-110EM175107815600026955390501.010.0508529405880166483.89×10⁻⁵17.4
RV-160EM81156815600039207840 (Bolt Fastening Only)451.010.050853920 (Bolt Fastening Only)7840 (Bolt Fastening Only)185871.77×10⁻⁴26.4
RV-160EM101156815600039207840 (Bolt Fastening Only)451.010.050853920 (Bolt Fastening Only)7840 (Bolt Fastening Only)185871.40×10⁻⁴26.4
RV-160EM129156815600039207840 (Bolt Fastening Only)451.010.050853920 (Bolt Fastening Only)7840 (Bolt Fastening Only)185871.06×10⁻⁴26.4
RV-160EM145156815600039207840 (Bolt Fastening Only)451.010.050853920 (Bolt Fastening Only)7840 (Bolt Fastening Only)185870.87×10⁻⁴26.4
RV-160EM171156815600039207840 (Bolt Fastening Only)451.010.050853920 (Bolt Fastening Only)7840 (Bolt Fastening Only)185870.74×10⁻⁴26.4
RV-320EM813136156000784015680 (Bolt Fastening Only)351.01.050807056 (Bolt Fastening Only)14112 (Bolt Fastening Only)28067 (Bolt Fastening Only)4.83×10⁻⁴44.3
RV-320EM101.53136156000784015680 (Bolt Fastening Only)351.01.050807056 (Bolt Fastening Only)14112 (Bolt Fastening Only)28067 (Bolt Fastening Only)3.79×10⁻⁴44.3
RV-320EM118.53136156000784015680 (Bolt Fastening Only)351.01.050807056 (Bolt Fastening Only)14112 (Bolt Fastening Only)28067 (Bolt Fastening Only)3.15×10⁻⁴44.3
RV-320EM1293136156000784015680 (Bolt Fastening Only)351.01.050807056 (Bolt Fastening Only)14112 (Bolt Fastening Only)28067 (Bolt Fastening Only)2.84×10⁻⁴44.3
RV-320EM1413136156000784015680 (Bolt Fastening Only)351.01.050807056 (Bolt Fastening Only)14112 (Bolt Fastening Only)28067 (Bolt Fastening Only)2.54×10⁻⁴44.3
RV-320EM1713136156000784015680 (Bolt Fastening Only)351.01.050807056 (Bolt Fastening Only)14112 (Bolt Fastening Only)28067 (Bolt Fastening Only)1.97×10⁻⁴44.3
RV-320EM1853136156000784015680 (Bolt Fastening Only)351.01.050807056 (Bolt Fastening Only)14112 (Bolt Fastening Only)28067 (Bolt Fastening Only)1.77×10⁻⁴44.3
RV-450EM8144101560001102522050 (Bolt Fastening Only)251.01.050858820 (Bolt Fastening Only)17640 (Bolt Fastening Only)301338.75×10⁻⁴66.4
RV-450EM10144101560001102522050 (Bolt Fastening Only)251.01.050858820 (Bolt Fastening Only)17640 (Bolt Fastening Only)301336.91×10⁻⁴66.4
RV-450EM118.544101560001102522050 (Bolt Fastening Only)251.01.050858820 (Bolt Fastening Only)17640 (Bolt Fastening Only)301335.75×10⁻⁴66.4
RV-450EM12944101560001102522050 (Bolt Fastening Only)251.01.050858820 (Bolt Fastening Only)17640 (Bolt Fastening Only)301335.20×10⁻⁴66.4
RV-450EM154.844101560001102522050 (Bolt Fastening Only)251.01.050858820 (Bolt Fastening Only)17640 (Bolt Fastening Only)301334.12×10⁻⁴66.4
RV-450EM17144101560001102522050 (Bolt Fastening Only)251.01.050858820 (Bolt Fastening Only)17640 (Bolt Fastening Only)301333.61×10⁻⁴66.4
RV-450EM19244101560001102522050 (Bolt Fastening Only)251.01.050858820 (Bolt Fastening Only)17640 (Bolt Fastening Only)301333.07×10⁻⁴66.4
RV-EM SERIES ROBOT HARMONIC GEARBOX DIMENSIONS 20EM & 40 EM
RV-EM SERIES ROBOT HARMONIC GEARBOX DIMENSIONS 80EM & 110EM & 160 EM
RV-EM SERIES ROBOT HARMONIC GEARBOX DIMENSIONS 320 EM

RV-EM Series Technical Datasheet (PDF)

3D CAD Models (STEP/IGES)

Installation & Maintenance Manual

Applications

The RV-EM Series RV Reducer is ideal for applications requiring high precision, impact resistance, and compact design, including:

  • Industrial Robotics: Robotic arms, collaborative robots (cobots), assembly manipulators, and high-speed pick-and-place systems.
  • CNC Machinery: Spindle drives, rotary tables, and precision actuators requiring stable torque under dynamic loads.
  • Automation Systems: Material handling equipment, automated assembly lines, and conveyor systems with high operational demands.
  • Medical & Laboratory Robotics: Surgical robots, diagnostic devices, and laboratory automation requiring both precision and reliability.
  • High-Impact Industrial Applications: Any environment where emergency stops or sudden load changes may occur.

For insights into impact-resistant industrial gear solutions and robotic automation, see Automation World and Robotics Tomorrow.

Contact Us

Enhance your automation systems with RV-EM Series RV reducers. Complete the form to request a quote, download technical datasheets, or consult with our engineering team for optimized solutions.

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