{
 "id": "ac-rls-aksim-4-dual-concentric",
 "name": "RLS AksIM-4 Dual Concentric Off-Axis Absolute Encoder",
 "subcategory": "magnetic-encoders",
 "brand": "RLS",
 "mpn": "AksIM-4 Dual Concentric",
 "summary": "Two 19-bit absolute off-axis encoders in one ultra-thin ring (motor + reducer output), launched 2026 for humanoid and cobot joints.",
 "maker": {
  "name": "RLS d.o.o.",
  "country": "SI",
  "role": "brand"
 },
 "made_in": "unknown",
 "specs": {
  "resolution_bits": {
   "label": "Resolution",
   "value": "19 bit per revolution on each ring (inner and outer)",
   "num": 19,
   "unit": "bit"
  },
  "accuracy_deg": {
   "label": "Accuracy",
   "value": "System accuracy ±0.015° (inner MRA039) / ±0.010° (outer MRA053) after self-calibration; typical installed calibrated ±0.020° / ±0.015°; uncalibrated ±0.050° / ±0.040°",
   "num": 0.01,
   "unit": "deg"
  },
  "max_speed_rpm": {
   "label": "Max speed",
   "value": "7,500 rpm (both rings)",
   "num": 7500,
   "unit": "rpm"
  },
  "interface": {
   "label": "Interface",
   "value": "BiSS C over RS422 (12-pin connector, separate channel per ring); SPI EncoLink for Dual Encoder (board-to-board)"
  },
  "form": {
   "label": "Form",
   "value": "off-axis ring kit, dual (MD053 readhead, 180° arc, + MRA039 inner ring + MRA053 outer ring)"
  },
  "sensing": {
   "label": "Sensing",
   "value": "unknown"
  },
  "supply_v": {
   "label": "Supply",
   "value": "4.5-5.5 V at connector",
   "num": 5,
   "unit": "V"
  },
  "bore_mm": {
   "label": "Bore",
   "value": "20 mm inner ring ID (MRA039); outer ring ID 40 mm, readhead ID 25 mm",
   "num": 20,
   "unit": "mm"
  },
  "od_mm": {
   "label": "Outer diameter",
   "value": "53 mm outer ring OD; readhead OD 62 mm",
   "num": 53,
   "unit": "mm"
  },
  "multiturn": {
   "label": "Multi-turn",
   "value": "yes, 16-bit multiturn counter option (inner ring interface only)"
  },
  "operating_temp": {
   "label": "Operating temp",
   "value": "-40 to 105 °C"
  }
 },
 "price": [],
 "moq": "unknown",
 "lead_time": "unknown",
 "hts": "unknown",
 "compliance": {
  "ndaa": "unknown",
  "blue_uas": "unknown",
  "fcc": "n/a",
  "notes": ""
 },
 "links": {
  "product": "https://www.rls.si/eng/aksim-dual",
  "datasheet": null,
  "cad": null
 },
 "equivalents": [
  "ac-rls-aksim-2",
  "ac-kingkong-dpt",
  "ac-kingkong-dpb"
 ],
 "pairs_with": [
  "ac-rls-aksim-2-redundant"
 ],
 "maglev": {
  "custom": "",
  "directory_ref": null
 },
 "sources": [
  {
   "url": "https://www.rls.si/eng/aksim-dual",
   "what": "specs: 19+19 bit, up to ±0.006°, 4.5-5.5 V, -40 to +105 °C"
  },
  {
   "url": "https://www.rls.si/cn/news/aksim4-dual-concentric-launch",
   "what": "launch news 2026-02-11, samples available"
  },
  {
   "url": "https://cdn.rls.si/media/documents/MDD01.pdf",
   "what": "AksIM-4 Dual Concentric datasheet MDD01: 19+19 bit, accuracy, 7,500 rpm, 4.5-5.5 V, ring sizes, interfaces, temperature"
  }
 ],
 "confidence": "VERIFIED",
 "stock": {
  "status": "unknown",
  "source": "https://www.rls.si/cn/news/aksim4-dual-concentric-launch",
  "as_of": "2026-10-30",
  "note": "maker says samples available; request quote"
 },
 "category": "actuators",
 "subcategory_title": "Magnetic Encoders",
 "icon": "encoder",
 "image": {
  "url": "https://parts.trymaglev.com/img/ac-rls-aksim-4-dual-concentric.webp",
  "thumb": "https://parts.trymaglev.com/img/t/ac-rls-aksim-4-dual-concentric.webp",
  "source_image": "https://cdn.rls.si/legacy/products/web.main.260.10.aksimdual.jpg",
  "source_page": "https://www.rls.si/eng/aksim-dual",
  "background": "removed (Apple Vision)",
  "as_of": "2026-10-30"
 },
 "origin": {
  "code": "SI",
  "basis": "hq"
 },
 "hts_resolved": {
  "code": "9031.80.80.85",
  "typical": true,
  "key": "encoders",
  "basis": "subcategory",
  "confidence": "low",
  "note": "Resolvers/RVDTs: 8543.70.45 (CBP N360060). Encoder ICs sold alone go to 8542."
 },
 "us_duty_by_origin": {
  "as_of": "2026-10-29",
  "rates": [
   {
    "origin": "CN",
    "duty_pct": 37.5,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "TW",
    "duty_pct": 10,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "VN",
    "duty_pct": 12.5,
    "possible_pct": 0,
    "usmca": false
   },
   {
    "origin": "IN",
    "duty_pct": 10,
    "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": 10,
    "possible_pct": 0,
    "usmca": true
   },
   {
    "origin": "US",
    "duty_pct": 0,
    "possible_pct": 0,
    "usmca": false
   }
  ]
 },
 "url": "https://parts.trymaglev.com/p/ac-rls-aksim-4-dual-concentric/",
 "markdown": "https://parts.trymaglev.com/p/ac-rls-aksim-4-dual-concentric/index.md",
 "equivalents_detail": [
  {
   "id": "ac-rls-aksim-2",
   "name": "RLS AksIM-2 Off-Axis Absolute Rotary Encoder",
   "brand": "RLS",
   "mpn": "AksIM-2 (MBxxx readhead + MRAxxx ring; configured)",
   "category": "actuators",
   "subcategory": "magnetic-encoders",
   "summary": "Thin through-hole absolute magnetic ring encoder (ID 8-68 mm) widely used as the output-side encoder in robot joints and exoskeletons.",
   "origin": "SI",
   "origin_basis": "hq",
   "price_usd": 238.97,
   "price_qty": 1,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": "https://parts.trymaglev.com/img/ac-rls-aksim-2.webp",
   "url": "https://parts.trymaglev.com/p/ac-rls-aksim-2/",
   "json": "https://parts.trymaglev.com/api/parts/ac-rls-aksim-2.json"
  },
  {
   "id": "ac-kingkong-dpt",
   "name": "KingKong DPT Series Robot Joint Dual Magnetic Encoder, 24-bit",
   "brand": "KingKong Technology",
   "mpn": "DPT series (DPT-10-25 to DPT-30-45)",
   "category": "actuators",
   "subcategory": "magnetic-encoders",
   "summary": "Two-in-one hollow magnetic encoder (motor + output side) for geared robot joints, 24-bit, from Beijing KingKong.",
   "origin": "CN",
   "origin_basis": "hq",
   "price_usd": 280,
   "price_qty": 1,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": "https://parts.trymaglev.com/img/ac-kingkong-dpt.webp",
   "url": "https://parts.trymaglev.com/p/ac-kingkong-dpt/",
   "json": "https://parts.trymaglev.com/api/parts/ac-kingkong-dpt.json"
  },
  {
   "id": "ac-kingkong-dpb",
   "name": "KingKong DPB Series Robot Joint Dual Magnetic Encoder, 20-bit (DPB-10B-15B-25 to DPB-30B-35B-45)",
   "brand": "KingKong Technology",
   "mpn": "DPB series (e.g. DPB-10B-15B-25-A-20-20-R-N-B-M)",
   "category": "actuators",
   "subcategory": "magnetic-encoders",
   "summary": "Hollow dual encoder (motor side + output side in one stator) for integrated robot joints, sized every 5 mm of bore; KingKong's 20-bit RS485 tier below the 24-bit DPT.",
   "origin": "CN",
   "origin_basis": "hq",
   "price_usd": null,
   "price_qty": null,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": "https://parts.trymaglev.com/img/ac-kingkong-dpb.webp",
   "url": "https://parts.trymaglev.com/p/ac-kingkong-dpb/",
   "json": "https://parts.trymaglev.com/api/parts/ac-kingkong-dpb.json"
  }
 ],
 "pairs_with_detail": [
  {
   "id": "ac-rls-aksim-2-redundant",
   "name": "RLS AksIM-2 Redundant Off-Axis Absolute Encoder (two readheads)",
   "brand": "RLS",
   "mpn": "AksIM-2 Redundant (MB039 / MB053 readheads; configured)",
   "category": "actuators",
   "subcategory": "magnetic-encoders",
   "summary": "AksIM-2 ring read by two electrically isolated readheads 180° apart, giving two independent position channels for joints that need functional-safety style redundancy.",
   "origin": "SI",
   "origin_basis": "hq",
   "price_usd": null,
   "price_qty": null,
   "ndaa": "unknown",
   "blue_uas": "unknown",
   "image": "https://parts.trymaglev.com/img/ac-rls-aksim-2-redundant.webp",
   "url": "https://parts.trymaglev.com/p/ac-rls-aksim-2-redundant/",
   "json": "https://parts.trymaglev.com/api/parts/ac-rls-aksim-2-redundant.json"
  }
 ]
}