Data captured: · Published: · Update delayed: this release is over 8 days old.
Series reference image, not this exact model · from harmonicdrive.net
1 / 1
1 / 1哈默纳科（上海）商贸有限公司 · Harmonic Drive Systems
RSF-20A
A · Joint Actuation · active · sources 1 · multiple values 3specs 17evidence [n]sources 1multiple values 3
No verified public price. Request a quotation from the seller.
1
Added to this browser's cart — no account, no contact details.
The prices here are distributors' listed figures, so this page does not take payment — a quote comes back with the real terms.
Shipping · lead time[value]
Specs.
Check before you order.
field · keyvaluesource sentencesourceEvidenceRetrieved · Changed
2 values for this fieldConfirm with the supplier.
Reduction ratioreduction_ratio
valuemeasured at How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 5050
source sentenceGear Ratio Gear Ratio 50 100 50 100 50 100 50 100
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
valuemeasured at How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 100100
source sentenceGear Ratio Gear Ratio 50 100 50 100 50 100 50 100
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
4 values for this fieldConfirm with the supplier.
Rated torquerated_torque
valuemeasured at Reduction ratio Gear Ratio: 50 · Row in other units Rated Torque In.lb 87 177 168 310 257 522 434 867
Rated Torque Nm 9.8 20 19 35 29 59 49 98 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 1919 N·m
source sentenceRated Torque Nm 9.8 20 19 35 29 59 49 98
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio Gear Ratio: 100 · Row in other units Rated Torque In.lb 87 177 168 310 257 522 434 867
Rated Torque Nm 9.8 20 19 35 29 59 49 98 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 3535 N·m
source sentenceRated Torque Nm 9.8 20 19 35 29 59 49 98
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio Gear Ratio: 50 · Row in other units Rated Torque In.lb 87 177 168 310 257 522 434 867
Rated Torque Nm 9.8 20 19 35 29 59 49 98 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 16818.98 N·m
source sentenceRated Torque In.lb 87 177 168 310 257 522 434 867
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio Gear Ratio: 100 · Row in other units Rated Torque In.lb 87 177 168 310 257 522 434 867
Rated Torque Nm 9.8 20 19 35 29 59 49 98 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 31035.03 N·m
source sentenceRated Torque In.lb 87 177 168 310 257 522 434 867
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Rated speedrated_speed
valuemeasured at Reduction ratio Gear Ratio: 50 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 6060 r/min
source sentenceRated Rotational Speed rpm 60 30 60 30 60 30 60 30
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Rated speedrated_speed
valuemeasured at Reduction ratio Gear Ratio: 100 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 3030 r/min
source sentenceRated Rotational Speed rpm 60 30 60 30 60 30 60 30
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
4 values for this fieldConfirm with the supplier.
Peak torquepeak_torque
valuemeasured at Reduction ratio Gear Ratio: 50 · Row in other units Max.Momentary Torque In.lb 301 478 496 726 867 1389 1947 2921
Max.Momentary Torque Nm 34 54 56 82 98 157 220 330 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 5656 N·m
source sentenceMax.Momentary Torque Nm 34 54 56 82 98 157 220 330
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio Gear Ratio: 100 · Row in other units Max.Momentary Torque In.lb 301 478 496 726 867 1389 1947 2921
Max.Momentary Torque Nm 34 54 56 82 98 157 220 330 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 8282 N·m
source sentenceMax.Momentary Torque Nm 34 54 56 82 98 157 220 330
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio Gear Ratio: 50 · Row in other units Max.Momentary Torque In.lb 301 478 496 726 867 1389 1947 2921
Max.Momentary Torque Nm 34 54 56 82 98 157 220 330 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 49656.04 N·m
source sentenceMax.Momentary Torque In.lb 301 478 496 726 867 1389 1947 2921
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio Gear Ratio: 100 · Row in other units Max.Momentary Torque In.lb 301 478 496 726 867 1389 1947 2921
Max.Momentary Torque Nm 34 54 56 82 98 157 220 330 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 72682.03 N·m
source sentenceMax.Momentary Torque In.lb 301 478 496 726 867 1389 1947 2921
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 50 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
0.1
source sentenceMoment of Inertia ( GD 2 /4) kg.m 2 0.05 0.19 0.1 0.39 0.19 0.77 0.67 2.7
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 100 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
0.39
source sentenceMoment of Inertia ( GD 2 /4) kg.m 2 0.05 0.19 0.1 0.39 0.19 0.77 0.67 2.7
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 50 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
1.0
source sentenceMoment of Inertia (J) kgfcm 2 0.48 1.9 1.0 4.0 2.0 7.9 6.9 27
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Moment of inertiamoment_of_inertia
valuemeasured at Reduction ratio Gear Ratio: 100 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
4.0
source sentenceMoment of Inertia (J) kgfcm 2 0.48 1.9 1.0 4.0 2.0 7.9 6.9 27
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Weightweight
valuemeasured at Reduction ratio Gear Ratio: 50 / 100 · How it was measured RSF Actuator
RSF
The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead. When combined with a performance matched servo drive, the RSF actuator delivers precise, reliable motion control for machines requiring both high torque and long life. The RSF Series is designed to operate with a wide range of third party drivers as well as Harmonic Drive LLC’s RTL Series, and REL Series.
as printed 2.92.9 kg
source sentenceMass Kg 2.1 2.1 2.9 2.9 4.7 4.7 8.7 8.7
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsf · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
specs 17, 17 shown
Source documents.
1 documents · 3 fields with several values
1 documents
harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rsfMaker's document · 17 valuesRetrieved 2026-09-08
DownloadSource files are not published yet: which documents may be published is undecided.
3 fields with several values
2026-09-08first collected · 1 sources
multiple values · 3Reduction ratio · Rated torque · Peak torque
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 · RSF-20A · 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.
WRC 2026 Beijing exhibitors, and other suppliers.
This supplier's parts 1,815Supplier page
Alternatives in preparation
Keep this part in your BOM.
When the BOM opens, you can collect parts and send one enquiry.