Official source
Precision motion product surface ↗
Official route separating rotary actuators, integrated actuators, gear units, component sets, servo gearheads and motors.
Manufacturer profile
Harmonic Drive
Precision motion components centered on strain-wave gearing and robot-joint reduction.
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.
Harmonic Drive supplies strain-wave component sets, housed gear units, servo gearheads and integrated actuators. Those forms assign very different responsibility for bearings, housing, lubrication, motor matching, feedback, cabling and thermal behavior, so a robot-joint decision must begin with the exact product form and order code rather than a generic “harmonic reducer” label.
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
Gear-unit portfolio ↗
Official housed, hollow-shaft, miniature and lightweight gear-unit family route.
Official source
Reducer engineering and selection catalog ↗
Official rating definitions, torque limits, life, engineering data and product-sizing 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
Component sets, gear units and integrated actuators cannot be treated as interchangeable because the robot builder assumes different bearing, sealing, motor and assembly responsibilities.
Signal 2
Zero-backlash portfolio language does not remove lost motion, torsional stiffness, hysteresis, repeatability, wear and test-condition questions at joint level.
Signal 3
The engineering catalog exposes multiple torque and life boundaries, making the named rating definition and load spectrum more important than one headline torque value.
Questions to resolve before comparison or purchase.
A useful quotation should identify the configuration and answer these boundaries in writing.
- What exact series, size, ratio, product form, option suffix, accuracy class, input interface and revision are being quoted?
- Which rated, acceleration, momentary peak, collision or emergency-stop torque definitions apply, and for what duration, speed and duty cycle?
- What lost-motion, torsional-stiffness, repeatability, efficiency and life conditions apply at the intended temperature and load spectrum?
- Who owns input/output bearing support, housing tolerances, alignment, fastener preload, lubrication, sealing and thermal dissipation in the selected form?
- What grease, mounting orientation, maintenance interval, regional lead time, repair route, PCN/EOL notice and approved substitution process apply?
What this dossier does not prove.
These limits prevent company-level research from being mistaken for product validation.
Portfolio-level zero-backlash language does not prove zero measured lost motion or hysteresis in an assembled robot joint.
An engineering catalog rating cannot be promoted to allowable robot operation without matching the exact series, ratio, load spectrum, mounting and thermal boundary.
RCI has not inspected, instrumented or life-tested a Harmonic Drive reducer or complete joint.
What the current RCI record set actually supports.
44 claim-level observations point to 6 distinct source URLs; unresolved conditions remain visible.
Profile state
Exact-model evidence linked
At least one exact component record is linked below.
Product focus
Strain-wave gearing, precision reducers and rotary actuators
Scope is descriptive and does not establish regional availability, fitness or equivalence across product families.
Evidence surface
3 models · 44 claims
6 distinct claim sources and 15 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.
Strain-wave gear unitactive
CSF-14-50-2UH
An exact size-and-ratio gear-unit record. Published torque and stiffness values remain rating-table claims, not an RCI robot-joint duty-cycle, thermal, life or backlash test.
Strain-wave gear unitactive
SHG-20-100-2UH
An exact size-and-ratio gear-unit record frozen from the official exact-model page. Rated, average, repeated-peak and momentary-peak torques are four separately conditioned catalog values and are transcribed separately; none of them is an RCI robot-joint duty-cycle, thermal or life result.
Strain-wave gear unitactive
CSG-17-100-2UH
An exact size-and-ratio gear-unit record for the high-torque CSG unit family, frozen from the official exact-model page. All torque figures remain separately conditioned rating-table claims, not RCI robot-joint measurements.