RV-CM Series RV Reducers – Hollow Shaft Design for Efficient Cable Management and Compact Layout

Product Overview

The RV-CM Series RV Reducers are engineered to address the challenges faced in modern automation, robotics, and industrial machinery, particularly where space constraints and cable management are critical concerns. Unlike traditional RV reducers, the RV-CM Series incorporates a hollow shaft design that allows cables, wiring, and pneumatic or hydraulic lines to pass directly through the reducer. This feature not only eliminates the risk of cable interference or tension during mechanical motion but also enables more compact and efficient system layouts, making it ideal for robotic arms, automated machinery, and general industrial equipment.

In addition to cable routing, the RV-CM Series RV Reducers integrates large-capacity bearings directly into the reducer body, which reduces the need for separate bearing platforms and additional support components. This design simplifies assembly, decreases the number of components, and minimizes adjustment and calibration time, ultimately saving labor costs and improving overall system reliability.

The RV-CM Series also features a robust construction optimized for both torsional rigidity and vibration reduction. Its hollow shaft, dual-column support structure, and high-capacity internal bearings work together to deliver smooth torque transmission, minimal backlash, and precise positioning, even under dynamic load conditions. These characteristics make the RV-CM Series a high-performance solution for industrial robotics, CNC machines, pick-and-place systems, and medical automation devices.

This combination of space efficiency, high rigidity, and simplified assembly makes the RV-CM Series an ideal choice for engineers who need flexible, high-performance, and maintenance-friendly solutions in tight installation environments. Whether for standard industrial equipment, advanced robotics, or specialized automation systems, the RV-CM Series enables designers to maximize efficiency, reduce system complexity, and improve reliability.

Key Features

  • Hollow Shaft for Efficient Cable Routing
    The RV-CM Series RV Reducers features a hollow center that allows cables, air hoses, or sensor lines to pass directly through the reducer. This prevents cable interference during rotation and simplifies the mechanical layout. For guidance on cable management in robotic systems, visit Robotics Tomorrow.
  • Built-In Large Capacity Bearings
    Integrating high-capacity bearings within the reducer eliminates the need for external bearing platforms. This reduces the number of components, minimizes adjustment efforts, and ensures robust load handling. Engineers benefit from faster assembly and reduced maintenance time.
  • Compact, Space-Saving Design
    The RV-CM Series RV Reducer is designed for tight installation spaces without compromising torque output or precision. Its hollow construction and compact profile make it ideal for applications with limited mechanical room.
  • Simplified Assembly & Reduced Components
    By integrating bearings and reduction components inside the housing, the RV-CM Series minimizes the number of external parts required. This translates to faster assembly, less calibration, and reduced labor costs, streamlining both production and maintenance processes.
  • High Precision and Reliability
    RV-CM Series RV Reducers maintain minimal backlash, ensuring precise torque transmission and consistent positioning accuracy. This is critical in robotic, CNC, and automation applications that demand repeatable, accurate motion.
  • Versatile Applications
    Suitable for a wide range of equipment, including industrial robots, CNC machinery, pick-and-place systems, and general automation devices, the RV-CM Series RV Reducer allows engineers to optimize system layouts, reduce interference, and achieve reliable operation.

Technical Information

ParametersRV-10CMRV-27CMRV-50CMRV-100CMRV-200CMRV-320CMRV-500CM
Reduction Ratio81、108
153、189
243		79、103
157、177
231.5		80、107
151、177
234		76.3、100.2
124.7、151.6
214.3、264.6		34.8635.6137.34
Shaft Rotation Number271390/281985/6136.751499/432778/783099/83
Case Rotation Number261352/281924/6133.751456/432700/783016/83
Output Torque (N·m)/Input Capacity (kW) @5 rpm136/0.09368/0.26681/0.481362/0.952724/1.904361/3.046811/4.75
Output Torque (N·m)/Input Capacity (kW) @10 rpm111/0.16299/0.42554/0.771107/1.552215/3.093538/4.945537/7.73
Output Torque (N·m)/Input Capacity (kW) @15 rpm98/0.21265/0.55490/1.03980/2.051960/4.113136/6.574900/10.26
Output Torque (N·m)/Input Capacity (kW) @20 rpm90/0.25243/0.68450/1.26899/2.511803/5.042881/8.054498/12.56
Output Torque (N·m)/Input Capacity (kW) @25 rpm84/0.29227/0.79420/1.47841/2.941686/5.882690/9.41–
Output Torque (N·m)/Input Capacity (kW) @30 rpm80/0.34215/0.90398/1.67796/3.331597/6.69––
Output Torque (N·m)/Input Capacity (kW) @40 rpm73/0.41197/1.10366/2.04730/4.08–––
Output Torque (N·m)/Input Capacity (kW) @50 rpm68/0.47184/1.29341/2.38––––
Output Torque (N·m)/Input Capacity (kW) @60 rpm65/0.54174/1.46–––––
Rated Torque (Tr) (N·m)98264.6490980196031364900
Rated Output Speed (Nr) (rpm)15151515151515
Rated Service Life (L₁₀) (h)6000600060006000600060006000
Allowable Start/Stop Torque (Tsi) (N·m)245662122524504900784012250
Momentary Maximum Allowable Torque (Ts2) (N·m)49013232450 (Bolt Fastening)
1960 (Through-hole Bolt)		4900 (Bolt Fastening)
3430 (Through-hole Bolt)		9800 (Bolt Fastening)
7350 (Through-hole Bolt)		1568024500
Maximum Allowable Output Speed (Nso) (rpm)80605040302520
Backlash (B) (arcsec)1111111
Lost Motion MAX. (arcmin)1.01.01.01.01.01.01.0
Angular Transmission Error MAX. (arcsec)70706050505050
Startup Efficiency (Typical Value) (%)75807580808580
Allowable Moment (Mo1) (N·m)6869801764245088202058034300
Momentary Allowable Moment (Mo2) (N·m)1372196035284900176403920078400
Allowable Radial Load (Wr) (N)57556520942811802314555708782970
Inertia Moment (Reduced to Input Shaft) (kg·m²)1.38×10⁻⁵0.550×10⁻⁴1.82×10⁻⁴0.475×10⁻³1.39×10⁻³0.518×10⁻²0.996×10⁻²
Inertia Moment (I=GD²/4) (kg·m²)0.678×10⁻³0.563×10⁻³0.363×10⁻²0.953×10⁻²1.94×10⁻²0.405×10⁻¹1.014×10⁻¹
Weight (kg)4.68.514.619.555.679.5154
RV-CM SERIES ROBOT HARMONIC GEARBOX DIMENSIONS 10 CM
RV-CM SERIES ROBOT HARMONIC GEARBOX DIMENSIONS 27 CM
RV-CM SERIES ROBOT HARMONIC GEARBOX DIMENSIONS 50 CM
RV-CM SERIES ROBOT HARMONIC GEARBOX DIMENSIONS 100CM

RV-CM Series Technical Datasheet (PDF)

3D CAD Models (STEP/IGES)

Installation & Maintenance Manual

Applications

The RV-CM Series is suitable for applications requiring compact layout, high precision, and easy cable management, including:

  • Industrial Robotics: Robotic arms, assembly manipulators, and collaborative robots (cobots).
  • Automation Systems: Pick-and-place equipment, material handling robots, and conveyor systems.
  • CNC Machinery: Rotary tables, spindle drives, and precision actuators.
  • Medical & Laboratory Automation: Surgical robots, diagnostic devices, and laboratory handling systems.
  • General Industrial Equipment: Applications where space is limited and cable routing is critical.

The hollow shaft design allows engineers to improve mechanical layouts, reduce interference, and ensure smooth operation even in compact systems.

Contact Us

Optimize your systems with RV-CM Series RV reducers. Complete the form to request a quote, download technical datasheets, or consult with our engineering team for customized solutions.

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