Harmonic Drive SHG-20-100-2UH Hollow-Shaft Strain-Wave Gear Unit
Harmonic Drive · MPN SHG-20-100-2UH · Maglev ID ac-harmonicdrive-shg-20-100-2uh
JP Maker in Japan, factory not confirmed unknown VERIFIED
Benchmark size-20 100:1 high-torque silk-hat hollow-shaft gear unit; the standard for cable-through robot joints.
Specifications
| Ratio | 100:1 |
|---|---|
| Rated torque | 52 N·m at 2,000 rpm input |
| Peak torque (repeated / momentary) | 107 N·m repeated (start/stop) / 191 N·m momentary |
| Backlash | Zero backlash (maker claim; no arcsec figure published) |
| Outer diameter | 90 mm (φA h7, SHG-20-2UH) |
| Hollow shaft | yes (hollow-shaft unit) |
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.
Loading duty data…
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
Leaderdrive LHSG-20-100 High-Torque Hat-Type Strain-Wave ReducerLeaderdrive · CN · QuoteKOFON KBG-HO-20-100 High-Torque Hollow Hat-Type Strain-Wave ReducerKOFON · CN · QuoteNidec FLEXWAVE WPU-50-100-SRH Hollow-Shaft Strain-Wave UnitNidec Drive Technology · JP · Quote
Han's Motion HMHG-20-100-I Hollow Harmonic ReducerHan's Motion · CN · QuoteSources
- https://www.harmonicdrive.net/products/gear-units/hollow-shaft-gear-units/shg-2uhSHG-2UH table: SHG-20-100-2UH torques; mass 1.38 kg
- https://www.harmonicdrive.net/_hd/content/documents1/SHG-SHF_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.