Nabtesco RV series high-precision reducer

Product positioning and core technology

The Nabtesco RV series is a two-stage high-precision cycloidal pinwheel reducer, which is the core transmission component of industrial robots and precision equipment.

Structure: First stage spur gear reduction+second stage cycloidal pinwheel reduction

Core advantages:

Simultaneous meshing of multiple teeth, uniform force distribution

Full rolling friction, high efficiency, minimal wear

Double supported crankshaft, high rigidity, impact resistance

Integrated angular contact bearing, no additional bearings required

Comparison of Three Major Product Series

Series Structure Features Core Advantages Typical Models

RV-E solid output shaft, with built-in main bearings for high rigidity, high precision, and universal RV-6E to RV-450E

RV-C hollow shaft structure, cable can pass through space saving, robot joint dedicated RV-10C~RV-500C

RV basic standard structure with high cost-effectiveness, general automation RV-15~RV-550

Key performance parameters

Torque Range

RV‑E：58 ~ 4410 N·m

RV‑C：98 ~ 4900 N·m

RV：137 ~ 5390 N·m

Speed ratio range: 31~192.4

Back gap: ≤ 1 arc · min

Anti impact torque: 5 times the rated torque

Rated lifespan: 6000 hours

Efficiency: 75%~90%

Selection method

Calculate the average load torque and average output speed

Verify acceleration and deceleration torque, emergency stop impact torque

Verify the rated lifespan, overturning moment, and torsional rigidity

Confirm installation form, concentricity, and lubrication method

Installation and lubrication specifications

Installation accuracy

Concentricity tolerance: ≤ 0.03 mm

Parallelism tolerance: ≤ 0.03 mm

Lubrication requirements

Special grease: Molywhite RE00

Fat replacement cycle: 20000 hours

Fat injection amount: horizontal/vertical installation differentiation

Tightening requirements

Bolt strength: 12.9 grade

Tighten according to specifications with torque and equipped with anti loosening washers

Model Naming and Ordering

Naming convention: RV+model+series+speed ratio+structure+axle type

Output Structure: Bolt Tightening Type/Pin+Bolt Tightening Type/Through Bolt Type

The document is accompanied by a complete list of part numbers, which can be ordered directly

Typical applications

Industrial robots: boom, forearm, wrist, rotating axis

Machine tools: CNC rotary table, dividing head, tool magazine

Automation: precision handling, assembly, inspection, servo positioning