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 13evidence [n]sources 2
No verified public price. Request a quotation from the seller.
700 N·mAllowable average load torque
752 N·mAllowable start/stop torque
31Reduction ratio
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
Allowable average load torqueallowable_average_load_torque
value
as printed 700700 N·m
source sentenceLimit for Average Torque 700 Nm
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox/40/hpn-40a-31 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-06Changed —
Allowable start/stop torqueallowable_startstop_torque
value
as printed 752752 N·m
source sentenceLimit for Repeated Peak Torque 752 Nm
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox/40/hpn-40a-31 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-06Changed —
Allowable start/stop torqueallowable_startstop_torque
valuemeasured at Reduction ratio 31
as printed 752752 N·m
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
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 31
as printed 1717 kg
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
value
as printed 3131
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
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 31 · Rated life basis Rated Torque L10
as printed 437437 N·m
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
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 31 · Rated life basis Rated Torque L50
as printed 700700 N·m
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
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 31
as printed 1,0971097 N·m
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
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 31
as printed 6,0006000 r/min
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
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 31
< 7
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Torsional stiffnesstorsional_stiffness
valuemeasured at Reduction ratio 31 · Stiffness region K1 Torsional Stiffness
as printed 14.3143000 N·m/rad
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Radial loadradial_load
valuemeasured at Reduction ratio 31
as printed 5,5005500 N
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Axial loadaxial_load
valuemeasured at Reduction ratio 31
as printed 5,4005400 N
source sentenceHPN-40A-31 40 142 31 437 700 752 1,097 6,000 < 7 17 14.3 5,500 5,400
sourcehttps://www.harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
specs 13, 13 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 · 11 valuesRetrieved 2026-09-08
harmonicdrive.net/products/servo-mount-gearheads/harmonic-planetary/hpn-a-planetary-gearbox/40/hpn-40a-31Maker's document · 2 valuesRetrieved 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
Change history kept
Build a joint around this part.
Once the family is set, this part can go into a joint.
Check joint combinationsJOINT · HPN-40A-31 · Unclassified
StatusNot applicable
- Family not yet set
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.