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
421 N·mAllowable average load torque
421 N·mAllowable start/stop torque
2.9 kgWeight
1
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field · keyvaluesource sentencesourceEvidenceRetrieved · Changed
Allowable average load torqueallowable_average_load_torque
value
as printed 421421 N·m
source sentenceLimit for Average Torque 421 Nm
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2/fb-50-120-2-gr · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Allowable start/stop torqueallowable_startstop_torque
value
as printed 421421 N·m
source sentenceLimit for Repeated Peak Torque 421 Nm
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2/fb-50-120-2-gr · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Weightweight
value
as printed 2.92.9 kg
source sentenceMass 2.9 kg
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2/fb-50-120-2-gr · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Allowable start/stop torqueallowable_startstop_torque
valuemeasured at Reduction ratio 120
as printed 421421 N·m
source sentenceFB-50-120-2-GR 50 120 304 421 706 < 3 2.9
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Weightweight
valuemeasured at Reduction ratio 120
as printed 2.92.9 kg
source sentenceFB-50-120-2-GR 50 120 304 421 706 < 3 2.9
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Reduction ratioreduction_ratio
value
as printed 120120
source sentenceFB-50-120-2-GR 50 120 304 421 706 < 3 2.9
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Rated torquerated_torque
valuemeasured at Reduction ratio 120 · Rated life basis Rated Torque L10
as printed 304304 N·m
source sentenceFB-50-120-2-GR 50 120 304 421 706 < 3 2.9
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Peak torquepeak_torque
valuemeasured at Reduction ratio 120
as printed 706706 N·m
source sentenceFB-50-120-2-GR 50 120 304 421 706 < 3 2.9
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2 · Maker's document
EvidenceSourced
Retrieved · Changed2026-09-08Changed —
Backlashbacklash
valuemeasured at Reduction ratio 120
< 3
source sentenceFB-50-120-2-GR 50 120 304 421 706 < 3 2.9
sourcehttps://www.harmonicdrive.net/products/component-sets/pancake/fb-2 · 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/component-sets/pancake/fb-2Maker's document · 6 valuesRetrieved 2026-09-08
harmonicdrive.net/products/component-sets/pancake/fb-2/fb-50-120-2-grMaker's document · 3 valuesRetrieved 2026-09-08
DownloadSource files are not published yet: which documents may be published is undecided.
No change
2026-09-08first collected · 2 sources
Next update2026-10-01
Change history kept
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Once the family is set, this part can go into a joint.
Check joint combinationsJOINT · FB-50-120-2-GR · Unclassified
StatusNot applicable
- Family not yet set
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