Official source
Precision reduction gear business ↗
Official corporate route for robot-joint reduction products and stated application scope.
Manufacturer profile
Nabtesco
Precision reduction equipment and motion products used in industrial robot axes.
Identity boundary
Profile, not endorsement.
RCI links the manufacturer identity to public evidence. Inclusion does not imply independent verification of performance, commercial availability in every region, or any commercial relationship with RCI.
Official website ↗Integration relevance
Why this supplier matters to a robot-system decision.
Nabtesco precision reduction gears sit between the servo motor and the robot link, so reducer selection affects torque density, rigidity, backlash, bearing/load assumptions, lubrication, mounting and lifetime. Component, gearhead, actuator and AGV drive-unit forms must remain separate procurement boundaries.
Desk review: 2026-08-13. This dossier maps official research routes and unresolved decision questions; it is not an exact-model recommendation.
Start with responsibility-party material.
These routes define the current desk-research surface. RCI does not treat a portfolio page as a datasheet, purchase commitment or independent result.
Official source
Precision Equipment product portal ↗
Official product-family, selection, application and support route.
Official source
Precision Equipment downloads ↗
Official catalog and technical-document route.
What changes the engineering decision.
Signals organize further evaluation; they are not rankings or proof that one supplier fits a specific robot.
Signal 1
The official product structure separates component, gearhead, actuator, positioner and AGV drive-unit forms; their integration responsibility is materially different.
Signal 2
Reducer lifetime and positioning behavior depend on applied torque, external load, duty, speed, mounting and lubrication—not ratio alone.
Signal 3
Motor fitting, sealing and pre-lubrication can reduce assembly work, but they do not remove robot-side bearing, structure or thermal checks.
Questions to resolve before comparison or purchase.
A useful quotation should identify the configuration and answer these boundaries in writing.
- What exact RV, RD, GH, actuator or drive-unit model and reduction ratio, option suffix and revision are quoted?
- Which rated, acceleration, momentary peak and emergency-stop torque limits apply, with what duration and load spectrum?
- What radial, axial and moment-load assumptions, input-bearing arrangement, lost motion/backlash class and torsional rigidity apply?
- Which lubricant, fill quantity, mounting orientation, seal, maintenance interval and ambient-temperature limits are required?
- What motor adapter, drawing revision, regional availability, lead time, repair route and PCN/EOL process attach to the order code?
What this dossier does not prove.
These limits prevent company-level research from being mistaken for product validation.
Corporate market-share and application statements do not establish performance or supply for an exact reducer order code.
A product-selection tool output is not a complete robot-joint safety or fatigue validation.
RCI has not measured lost motion, efficiency, temperature, life or overload behavior on a Nabtesco reducer.
What the current RCI record set actually supports.
29 claim-level observations point to 3 distinct source URLs; unresolved conditions remain visible.
Profile state
Exact-model evidence linked
At least one exact component record is linked below.
Product focus
Cycloidal precision reduction gears for industrial robot joints
Scope is descriptive and does not establish regional availability, fitness or equivalence across product families.
Evidence surface
2 models · 29 claims
3 distinct claim sources and 11 explicit unknown, conflict or limitation entries.
Editorial next step
Deepen the weakest conditions
Prioritize thermal, lifecycle, compatibility and independent-test gaps.
Questions RCI applies before comparison.
These checks define the evidence work still required; they are not claims about this manufacturer.
A
Motion & Actuation
- Separate continuous, peak and stall output
- Preserve duty cycle, thermal and cooling conditions
- Resolve gearing, backlash, encoder and brake boundaries
- Pin voltage, firmware and communication variant
Components in the current release.
Every value on these records points to a claim-level source and verification date.
Cycloidal precision reduction-gear componentactive
RV-20E (ratio 57)
The RV-20E size and ratio-57 row are kept together so ratings from another ratio or RV product form cannot silently migrate into this record. It remains a customer-integrated reducer component, not a complete robot joint or actuator.
Cycloidal precision reduction-gear componentactive
RV-25N (ratio 81)
The RV-25N size and the ratio-81 selection column are kept together so ratings from another ratio or RV product form cannot silently migrate into this record. Rated torque is defined at the published rated output speed; the acceleration/deceleration and momentary maxima are separate allowable values with their own conditions.