JOINTDEX
Start Your Project

Data captured: · Published: · Update delayed: this release is over 8 days old.

Components › A · Joint Actuation › Harmonic Drive Systems
RH-8DAdd to cart
Series reference image, not this exact model · from harmonicdrive.netRH-8D — RH-Mini series picture — manufacturer series reference image1 / 1
哈默纳科（上海）商贸有限公司 · Harmonic Drive Systems

RH-8D

A · Joint Actuation · active · sources 1 · multiple values 3
specs 15evidence [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.

Put into a jointAsk on the supplier's site
Shipping · lead time[value]

Specs.

Check before you order.

field · keyvaluesource sentencesourceEvidenceRetrieved · Changed
2 values for this fieldConfirm with the supplier.
Reduction ratioreduction_ratio
value
as printed 5050
source sentenceReduction ratio - 50 80 100 50 100 50 100 50 100
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
value
as printed 100100
source sentenceReduction ratio - 50 80 100 50 100 50 100 50 100
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
4 values for this fieldConfirm with the supplier.
Rated torquerated_torque
valuemeasured at Reduction ratio 50
as printed 1.41.4 N·m
source sentenceRated torque N·m 0.16 0.29 0.29 1.4 2 2.2 3.9 3.2 5.9
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio 100
as printed 22 N·m
source sentenceRated torque N·m 0.16 0.29 0.29 1.4 2 2.2 3.9 3.2 5.9
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio 50
as printed 12.41.401 N·m
source sentenceRated torque In.lb 1.42 2.57 2.57 12.4 17.7 19.5 34.5 28.3 52.2
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio 100
as printed 17.72 N·m
source sentenceRated torque In.lb 1.42 2.57 2.57 12.4 17.7 19.5 34.5 28.3 52.2
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Weightweight
valuemeasured at Reduction ratio Reduction ratio: 50 / 100
as printed 0.30.3 kg
source sentenceMass kg 0.09 0.09 0.09 0.3 0.3 0.5 0.5 0.77 0.77
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
4 values for this fieldConfirm with the supplier.
Peak torquepeak_torque
valuemeasured at Reduction ratio 50
as printed 2.72.7 N·m
source sentenceMaximum momentary torque N·m 0.39 0.59 0.69 2.7 3.5 4.9 7.8 14 20
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio 100
as printed 3.53.5 N·m
source sentenceMaximum momentary torque N·m 0.39 0.59 0.69 2.7 3.5 4.9 7.8 14 20
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio 50
as printed 23.92.7 N·m
source sentenceMaximum momentary torque In.lb 3.45 5.22 6.11 23.9 31.0 43.4 69.0 123.9 177.0
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio 100
as printed 31.03.503 N·m
source sentenceMaximum momentary torque In.lb 3.45 5.22 6.11 23.9 31.0 43.4 69.0 123.9 177.0
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceConflicting
Retrieved · Changed2026-09-08Changed —
Max speedmax_speed
valuemeasured at Reduction ratio 50
as printed 100100 r/min
source sentenceMax. rotational speed rpm 180 110 90 100 50 100 50 100 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Max speedmax_speed
valuemeasured at Reduction ratio 100
as printed 5050 r/min
source sentenceMax. rotational speed rpm 180 110 90 100 50 100 50 100 50
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Rated speedrated_speed
valuemeasured at Reduction ratio 50
as printed 6060 r/min
source sentenceRated rotational speed rpm 88 55 44 60 30 60 30 60 30
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Rated speedrated_speed
valuemeasured at Reduction ratio 100
as printed 3030 r/min
source sentenceRated rotational speed rpm 88 55 44 60 30 60 30 60 30
sourcehttps://www.harmonicdrive.net/products/rotary-actuators/actuators-without-hollow-shaft/rh-mini · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
specs 15, 15 shown

Source documents.

1 documents · 3 fields with several values

1 documents
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 combinations
JOINT · RH-8D · 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.

哈默纳科（上海）商贸有限公司Harmonic Drive Systems
WRC2026-B-008Hall BBooth B110CNharmonicdrive.net · official
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.

Enquire about this partSee other parts