# Harmonic Drive SHG-25-100-2UH Hollow-Shaft Strain-Wave Gear Unit

Benchmark size-25 100:1 high-torque silk-hat hollow-shaft gear unit.

- Maglev ID: ac-harmonicdrive-shg-25-100-2uh
- Brand: Harmonic Drive
- MPN: SHG-25-100-2UH
- Category: actuators / Strain-Wave (Harmonic) Reducers
- Origin: JP (maker HQ, factory not confirmed)
- Maker: Harmonic Drive LLC / Harmonic Drive Systems (brand, JP)
- NDAA: unknown · Blue UAS: unknown · FCC: n/a
- HTS: 8483.40.50.10
- MOQ: unknown · Lead time: unknown
- Confidence: VERIFIED

## Price
- No public price. Request a quote via POST /api/rfq or the order pad.

## Specifications
- Ratio: 100:1
- Rated torque: 87 N·m at 2,000 rpm input
- Peak torque (repeated / momentary): 204 N·m repeated (start/stop) / 369 N·m momentary
- Backlash: Zero backlash (maker claim; no arcsec figure published)
- Outer diameter: 110 mm (φA h7, SHG-25-2UH)
- Hollow shaft: yes (hollow-shaft unit)

## Links
- Product: https://www.harmonicdrive.net/products/gear-units/hollow-shaft-gear-units/shg-2uh
- Datasheet: https://www.harmonicdrive.net/_hd/content/documents1/SHG-SHF_GearUnits.pdf
- CAD: none

## Equivalents
- Leaderdrive LHSG-25-100 High-Torque Hat-Type Strain-Wave Reducer (ac-leaderdrive-lhsg-25-100)
- Laifual FHG-25-100 High-Torque Hat-Type Hollow Strain-Wave Reducer (ac-laifual-fhg-25-100)
- TC Drive HSG-25-100-C-H High-Torque Hollow Hat-Type Strain-Wave Unit (ac-tcdrive-hsg-25-100-c-h)

## Sources
- https://www.harmonicdrive.net/products/gear-units/hollow-shaft-gear-units/shg-2uh (SHG-2UH table: SHG-25-100-2UH torques; mass 2.1 kg)
- https://www.harmonicdrive.net/_hd/content/documents1/SHG-SHF_GearUnits.pdf (outline dimensions table (outer diameter))