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 / 1specs 9evidence [n]sources 2
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114 N·mAllowable start/stop torque
25Reduction ratio
1
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field · keyvaluesource sentencesourceEvidenceRetrieved · Changed
Allowable start/stop torqueallowable_startstop_torque
valuemeasured at Reduction ratio 25
as printed 114114 N·m
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Weightweight
valuemeasured at Reduction ratio 25
as printed 4.64.6 kg
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Allowable start/stop torqueallowable_startstop_torque
value
as printed 114114 N·m
source sentenceLimit for Repeated Peak Torque 114 Nm
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox/20/hpn-20a-25 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-06Changed —
Reduction ratioreduction_ratio
value
as printed 2525
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio 25 · Rated life basis Rated Torque L10
as printed 7272 N·m
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio 25 · Rated life basis Rated Torque L50
as printed 8080 N·m
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio 25
as printed 256256 N·m
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Max input speedmax_input_speed
valuemeasured at Reduction ratio 25
as printed 6,0006000 r/min
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Backlashbacklash
valuemeasured at Reduction ratio 25
< 7
source sentenceHPN-20A-25 20 90 25 72 80 114 256 6,000 < 7 4.6
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
specs 9, 9 shown
Source documents.
2 sources the values were read from
2 documents
harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearboxMaker's document · 8 valuesRetrieved 2026-09-08
harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox/20/hpn-20a-25Maker's document · 1 valueRetrieved 2026-09-06
DownloadSource files are not published yet: which documents may be published is undecided.
No change
2026-09-06first collected · 2 sources
Next update2026-10-01
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Check joint combinationsJOINT · HPN-20A-25 · Unclassified
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