Harmonic Drive CSF-20-100-2UH Strain-Wave Gear Unit
Harmonic Drive · MPN CSF-20-100-2UH · Maglev ID ac-harmonicdrive-csf-20-100-2uh
JP Maker in Japan, factory not confirmed unknown VERIFIED
Benchmark size-20 100:1 standard-torque cup-type gear unit with crossed-roller output bearing; the reference most Chinese LCS/FSS/CS parts copy.
Specifications
| Ratio | 100:1 |
|---|---|
| Rated torque | 40 N·m at 2,000 rpm input |
| Peak torque (repeated / momentary) | 82 N·m repeated (start/stop) / 147 N·m momentary |
| Backlash | Zero backlash (maker claim; no arcsec figure published) |
| Outer diameter | 93 mm (φA, CSG/CSF-20 gear unit) |
| Hollow shaft | no (cup type) |
Who makes it
MakerHarmonic Drive LLC / Harmonic Drive Systems
Based inJapan
RoleBrand owner
Need a different shaft, connector, firmware or enclosure, or a price at 1,000 units? Maglev takes the catalog part to the factory and comes back with a custom version and one fixed price.
Landed cost in the US
CN
40%
TW
10%
VN
15%
IN
12.5%
JP
12.5%
KR
12.5%
DE
10%
MX
12.5%
US
0%
Total US duty on this part by where it is made (2026-10-29). Mexico shown before USMCA preference; qualifying goods enter duty free. Your factory choice, not the shipping port, sets the origin.
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Compliance
| HTS classification | 8483.40.50.10 |
|---|---|
| NDAA | unknown |
| Blue UAS | unknown |
| FCC | n/a |
| Notes | Harmonic Drive rates torque at 2,000 rpm input. Peak column: L10 limit for repeated peak / limit for momentary peak. |
Equivalents from other makers
Sources
- https://www.harmonicdrive.net/products/gear-units/gear-units/csf-2uhCSF-2UH table: CSF-20-100-2UH torques; mass 0.98 kg
- https://www.harmonicdrive.net/_hd/content/documents1/CSG-CSF_GearUnits.pdfoutline dimensions table (outer diameter)
Record confidence: VERIFIED. VERIFIED means the maker's own documents; REPORTED means a credible third party; UNVERIFIED means a single weak source. Anything we could not confirm says unknown.