RV-C Series RV Reducers – Lightweight, High-Precision, Compact Design for Robotic Arms

Product Overview

The RV-C series RV reducers are purpose-built for robotic arms and high-precision automation systems, combining lightweight design, slim profile, and high rigidity to deliver unmatched positioning accuracy. Designed with the modern industrial automation environment in mind, these reducers are ideal for applications that demand smooth torque transmission, minimal vibration, and compact installation space.

One of the standout features of the RV-C series RV reducers is its hollow shaft mechanism, which allows for cabling and wiring to pass directly through the reducer, reducing clutter and simplifying installation in robotic systems. Coupled with a built-in main bearing system and dual-column support structure, these reducers provide exceptional structural rigidity, high torsional strength, and impact resistance.

The 2-stage reduction mechanism of the RV-C Series reduces vibrations and rotational inertia, improving the dynamic response of robotic arms while decreasing wear on connected motors. By leveraging a rolling contact mechanism and needle gear engagement, these reducers achieve extremely low backlash (as low as 1 arc minute), making them perfect for applications that require ultra-precise motion control.

Whether you are designing industrial robots, CNC machinery, or medical robotic devices, the RV-C Series RV reducer combines precision engineering with reliability.

Key Features

  • Lightweight, Slim Profile
    The RV-C Series RV reducer’ compact housing reduces overall weight while maintaining high torque output. This enables robotic arms to move faster, reduces motor strain, and improves overall system energy efficiency. For insights into lightweight industrial actuators, see Robotics Business Review.
  • Hollow Shaft Mechanism
    This mechanism allows internal routing of cables, air tubes, or sensors for clean and organized system integration. It also reduces installation footprint, saving valuable space in compact robotic and automation environments.
  • Built-In Main Bearings
    Built-in main bearings support external radial and axial loads through angular contact ball bearings. They simplify construction by reducing the number of additional components and enhance system reliability and load-carrying capacity, critical for industrial applications.
  • 2-Stage Reduction Mechanism
    The two-stage reduction minimizes vibration and rotational inertia (GD²) for smoother motion. Slower rotation of RV gears reduces vibration in connected motor systems, allowing smaller motors to achieve the same torque output with improved precision.
  • Dual Column Support Structure
    The dual column support provides high torsional rigidity and impact resistance (rated torque impact up to 500%). It reduces vibration and enhances crankshaft stability, critical for high-precision operations.
  • Rolling Contact Mechanism
    The rolling contact mechanism optimizes startup efficiency and reduces wear over time while maintaining minimal backlash (1 arc minute) to ensure precise motion.
  • Needle Gear Engagement
    Multiple simultaneous engagement points between RV gear and needle gears ensure smooth torque transmission and high impact resistance for demanding industrial applications.

Technical Information

ParameterRV-10CRV-27CRV-50CRV-100CRV-200CRV-320CRV-500C
Reduction Ratio2736.5732.5436.7534.8635.6137.34
Shaft Rotation271390/381985/6136.751499/432778/783099/83
Case Rotation261352/381924/6135.751456/432700/783016/83
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-C SERIES ROBOT Harmonic GEARBOX Dimensions 10C
RV-C SERIES ROBOT Harmonic GEARBOX Dimensions 27C
RV-C SERIES ROBOT Harmonic GEARBOX Dimensions 50C
RV-C SERIES ROBOT Harmonic GEARBOX Dimensions 100C
RV-C SERIES ROBOT Harmonic GEARBOX Dimensions 200C
RV-C SERIES ROBOT Harmonic GEARBOX Dimensions 320C
RV-C SERIES ROBOT Harmonic GEARBOX Dimensions 500C

RV-C Series Technical Datasheet (PDF)

3D CAD Models (STEP/IGES)

Installation & Maintenance Manual

Applications

The RV-C Series excels in applications requiring lightweight, high-precision, and compact reducers, including:

  • Industrial Robotics: Robotic arms, assembly manipulators, and collaborative robots (cobots). See examples on Robotics Tomorrow.
  • CNC Machinery & Automation: Spindle drives, rotary tables, precision actuators, and pick-and-place systems.
  • Medical Robotics: Surgical robots, lab automation, and diagnostic devices requiring precise motion.
  • Aerospace & Defense: High-accuracy gimbals, flight simulators, and radar positioning mechanisms.
  • Semiconductor Manufacturing: Wafer handling, robotic assembly, and precision conveyors.

Thanks to the low vibration, high rigidity, and minimal backlash of RV-C RV reducers, engineers can achieve repeatable, precise movements even in high-speed or high-torque operations.

Contact Us

Enhance your robotic systems with high-precision, lightweight RV-C Series RV reducer. Fill out the form to request a quote, download technical datasheets, or consult with our engineering team.

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