{
 "id": "ac-harmonicdrive-shg-20-100-2uh",
 "name": "Harmonic Drive SHG-20-100-2UH Hollow-Shaft Strain-Wave Gear Unit",
 "subcategory": "strain-wave-reducers",
 "brand": "Harmonic Drive",
 "mpn": "SHG-20-100-2UH",
 "summary": "Benchmark size-20 100:1 high-torque silk-hat hollow-shaft gear unit; the standard for cable-through robot joints.",
 "maker": {
  "name": "Harmonic Drive LLC / Harmonic Drive Systems",
  "country": "JP",
  "role": "brand"
 },
 "made_in": "unknown",
 "specs": {
  "ratio": {
   "label": "Ratio",
   "value": "100:1",
   "num": 100
  },
  "rated_torque_nm": {
   "label": "Rated torque",
   "value": "52 N·m at 2,000 rpm input",
   "num": 52,
   "unit": "N·m"
  },
  "peak_torque_nm": {
   "label": "Peak torque (repeated / momentary)",
   "value": "107 N·m repeated (start/stop) / 191 N·m momentary",
   "num": 107,
   "unit": "N·m"
  },
  "backlash_arcsec": {
   "label": "Backlash",
   "value": "Zero backlash (maker claim; no arcsec figure published)",
   "num": 0,
   "unit": "arcsec"
  },
  "od_mm": {
   "label": "Outer diameter",
   "value": "90 mm (φA h7, SHG-20-2UH)",
   "num": 90,
   "unit": "mm"
  },
  "hollow_shaft": {
   "label": "Hollow shaft",
   "value": "yes (hollow-shaft unit)",
   "num": null
  }
 },
 "price": [],
 "moq": "unknown",
 "lead_time": "unknown",
 "hts": "8483.40.50.10",
 "compliance": {
  "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."
 },
 "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": null
 },
 "equivalents": [
  "ac-leaderdrive-lhsg-20-100",
  "ac-kofon-kbg-ho-20-100",
  "ac-nidec-wpu-50-100-srh",
  "ac-hansmotion-hmhg-20-100-i"
 ],
 "pairs_with": [],
 "maglev": {
  "custom": "",
  "directory_ref": null
 },
 "sources": [
  {
   "url": "https://www.harmonicdrive.net/products/gear-units/hollow-shaft-gear-units/shg-2uh",
   "what": "SHG-2UH table: SHG-20-100-2UH torques; mass 1.38 kg"
  },
  {
   "url": "https://www.harmonicdrive.net/_hd/content/documents1/SHG-SHF_GearUnits.pdf",
   "what": "outline dimensions table (outer diameter)"
  }
 ],
 "confidence": "VERIFIED",
 "stock": {
  "status": "unknown",
  "source": "https://www.harmonicdrive.net/products/gear-units/hollow-shaft-gear-units/shg-2uh",
  "as_of": "2026-10-30"
 },
 "category": "actuators",
 "subcategory_title": "Strain-Wave (Harmonic) Reducers",
 "icon": "driver",
 "origin": {
  "code": "JP",
  "basis": "hq"
 },
 "hts_resolved": {
  "code": "8483.40.50.10",
  "typical": false,
  "confidence": "part"
 },
 "us_duty_by_origin": {
  "as_of": "2026-10-29",
  "rates": [
   {
    "origin": "CN",
    "duty_pct": 40,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "TW",
    "duty_pct": 10,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "VN",
    "duty_pct": 15,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "IN",
    "duty_pct": 12.5,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "JP",
    "duty_pct": 12.5,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "KR",
    "duty_pct": 12.5,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "DE",
    "duty_pct": 10,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "MX",
    "duty_pct": 12.5,
    "possible_pct": 0,
    "usmca": true
   },
   {
    "origin": "US",
    "duty_pct": 0,
    "possible_pct": 0,
    "usmca": false
   }
  ]
 },
 "url": "https://parts.trymaglev.com/p/ac-harmonicdrive-shg-20-100-2uh/",
 "markdown": "https://parts.trymaglev.com/p/ac-harmonicdrive-shg-20-100-2uh/index.md",
 "equivalents_detail": [
  {
   "id": "ac-leaderdrive-lhsg-20-100",
   "name": "Leaderdrive LHSG-20-100 High-Torque Hat-Type Strain-Wave Reducer",
   "brand": "Leaderdrive",
   "mpn": "LHSG-20-100",
   "category": "actuators",
   "subcategory": "strain-wave-reducers",
   "summary": "Size-20 100:1 high-torque hat-type harmonic reducer with hollow-bore option; Leaderdrive's answer to Harmonic Drive SHG for hollow robot joints.",
   "origin": "CN",
   "origin_basis": "hq",
   "price_usd": null,
   "price_qty": null,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": "https://parts.trymaglev.com/img/ac-leaderdrive-lhsg-20-100.webp",
   "url": "https://parts.trymaglev.com/p/ac-leaderdrive-lhsg-20-100/",
   "json": "https://parts.trymaglev.com/api/parts/ac-leaderdrive-lhsg-20-100.json"
  },
  {
   "id": "ac-kofon-kbg-ho-20-100",
   "name": "KOFON KBG-HO-20-100 High-Torque Hollow Hat-Type Strain-Wave Reducer",
   "brand": "KOFON",
   "mpn": "KBG-HO-20-100",
   "category": "actuators",
   "subcategory": "strain-wave-reducers",
   "summary": "Size-20 100:1 high-torque hat-type harmonic reducer with a hollow cam carried on two ball bearings, usable as a standalone reducer; from Hubei planetary-gearbox maker KOFON.",
   "origin": "CN",
   "origin_basis": "hq",
   "price_usd": null,
   "price_qty": null,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": null,
   "url": "https://parts.trymaglev.com/p/ac-kofon-kbg-ho-20-100/",
   "json": "https://parts.trymaglev.com/api/parts/ac-kofon-kbg-ho-20-100.json"
  },
  {
   "id": "ac-nidec-wpu-50-100-srh",
   "name": "Nidec FLEXWAVE WPU-50-100-SRH Hollow-Shaft Strain-Wave Unit",
   "brand": "Nidec Drive Technology",
   "mpn": "WPU-50-100-SRH",
   "category": "actuators",
   "subcategory": "strain-wave-reducers",
   "summary": "FLEXWAVE high-torque type B2 open hollow-shaft unit, size 50 (HD size-20 class), 100:1; also offered as Smart-FLEXWAVE with built-in torque/temperature sensor (BD code).",
   "origin": "JP",
   "origin_basis": "hq",
   "price_usd": null,
   "price_qty": null,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": null,
   "url": "https://parts.trymaglev.com/p/ac-nidec-wpu-50-100-srh/",
   "json": "https://parts.trymaglev.com/api/parts/ac-nidec-wpu-50-100-srh.json"
  },
  {
   "id": "ac-hansmotion-hmhg-20-100-i",
   "name": "Han's Motion HMHG-20-100-I Hollow Harmonic Reducer",
   "brand": "Han's Motion",
   "mpn": "unknown",
   "category": "actuators",
   "subcategory": "strain-wave-reducers",
   "summary": "Han's Motion HMHG-I hollow-shaft, fully sealed harmonic unit with internal support bearing, size 20, ratio 100; 52 N·m rated at 2000 rpm, 10 arcsec backlash. Order code not published by the maker; size and ratio as listed by a distributor.",
   "origin": "CN",
   "origin_basis": "hq",
   "price_usd": null,
   "price_qty": null,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": "https://parts.trymaglev.com/img/ac-hansmotion-hmhg-20-100-i.webp",
   "url": "https://parts.trymaglev.com/p/ac-hansmotion-hmhg-20-100-i/",
   "json": "https://parts.trymaglev.com/api/parts/ac-hansmotion-hmhg-20-100-i.json"
  }
 ],
 "pairs_with_detail": []
}