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1 / 1哈默纳科（上海）商贸有限公司 · Harmonic Drive Systems
FHA-25C
A · Joint Actuation · active · sources 3 · multiple values 1specs 24evidence [n]sources 3multiple values 1
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field · keyvaluesource sentencesourceEvidenceRetrieved · Changed
12 values for this fieldConfirm with the supplier.
Reduction ratioreduction_ratio
value
as printed 50:150
source sentenceReduction ratio 50:1 80:1 or
sourcehttps://www.harmonicdrive.net/media/3176/fha-c.pdf · p.26 · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-03Changed —
Reduction ratioreduction_ratio
value
as printed 50:150
source sentenceReduction ratio 50:1 80:1 or
sourcehttps://www.harmonicdrive.net/media/3176/fha-c.pdf · p.26 · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-03Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 5050
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 8080
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 100100
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 120120
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 160160
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 50 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 0.818100000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 80 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 2.121000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 100 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 3.232000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 120 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 4.747000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 160 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 8.383000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Weightweight
valuemeasured at Reduction ratio Gear Ratio: 50 / 80 / 100 / 120 / 160 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 4.04 kg
source sentenceMass kg 2.5 2.5 2.5 2.5 2.5 4.0 4.0 4.0 4.0 4.0 6.5 6.5 6.5 6.5 6.5 12 12 12 12 12
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 5050
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 8080
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 100100
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 120120
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 160160
source sentenceGear Ratio Gear Ratio 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160 50 80 100 120 160
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 50 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 0.818100000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 80 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 2.121000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 100 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 3.232000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 120 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 4.747000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 160 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 8.383000000 g·cm²
source sentenceMoment of Inertia(GD 2 /4) kg.m 2 0.17 0.43 0.67 0.97 1.7 0.81 2.1 3.2 4.7 8.3 1.8 4.5 7.1 10.2 18.1 4.9 12.5 19.5 28.1 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Weightweight
valuemeasured at Reduction ratio Gear Ratio: 50 / 80 / 100 / 120 / 160 · How it was measured FHA-C Hollow Shaft Servo Actuators | Harmonic Drive
FHA-C Rotary Actuator
A large hole through these brushless actuator allows wires, tubing, laser beams or other components to pass directly through the axis of rotation.
as printed 4.04 kg
source sentenceMass kg 2.5 2.5 2.5 2.5 2.5 4.0 4.0 4.0 4.0 4.0 6.5 6.5 6.5 6.5 6.5 12 12 12 12 12
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-c · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
specs 24, 24 shown
Source documents.
3 documents · 1 fields with several values
3 documents
harmonicdrive.net/products/rotary-actuators/actuators-hollow-shaft/fha-cMaker's document · 11 valuesRetrieved 2026-09-08
harmonicdrive.net/products/rotary-actuators/hollow-shaft-servo-actuators/fha-cMaker's document · 11 valuesRetrieved 2026-09-08
DownloadSource files are not published yet: which documents may be published is undecided.
1 fields with several values
2026-09-03first collected · 3 sources
multiple values · 1Reduction ratio
Next update2026-10-01
Change history kept
Build a joint around this part.
Put a motor, a reducer and an encoder into the slots to see whether they combine.
Check joint combinationsJOINT · FHA-25C · A · Joint Actuation
StatusNeeds checking
- Missing specs for the joint check
- No verdict: the specification keys it needs are not settled
To settle before a verdict
Supplier.
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This supplier's parts 1,815Supplier page
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Keep this part in your BOM.
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