--- title: "AK80-9 (V3.0 KV100) vs GIM8108-8" description: "Compare AK80-9 (V3.0 KV100) and GIM8108-8: catalog torque, mass, speed, price and source/revision caveats. Not a matched-condition test or compatibility recommendation." canonical: https://actuatorlist.com/comparisons/cubemars-ak80-9-vs-steadywin-gim8108-8 last-updated: 2026-11-01T14:05:43.000Z --- # AK80-9 (V3.0 KV100) vs GIM8108-8 Compare AK80-9 (V3.0 KV100) and GIM8108-8: catalog torque, mass, speed, price and source/revision caveats. Not a matched-condition test or compatibility recommendation. Unknown means not documented, not zero. ## AK80-9 (V3.0 KV100) ![AK80-9 (V3.0 KV100): illustrative catalog photo; revision/variant unconfirmed](/actuator-images/cubemars-ak80-9.webp) [Catalog and sources](/actuators/cubemars-ak80-9) ## GIM8108-8 ![GIM8108-8: illustrative catalog photo; revision/variant unconfirmed](/actuator-images/steadywin-gim8108-8.webp) [Catalog and sources](/actuators/steadywin-gim8108-8) ## Specifications | Specification | AK80-9 (V3.0 KV100) | GIM8108-8 | | --- | --- | --- | | Peak torque (catalog) | 22 N·m | 22 N·m | | Rated torque (catalog) | 9 N·m | 7.5 N·m | | Maximum speed (catalog) | 570 rpm | 320 rpm | | Mass | 485 g: Revision conflict: retained catalog value; confirm installed revision. Density inherits mass uncertainty. | 375 g | | Gear ratio | 9:1 | 8:1 | | Voltage | 24-48 V | 24-56 V | | Price (catalog, not a live quote) | 580 USD | 129.2 USD | | Encoder (resolution is not accuracy) | 14-bit magnetic (motor-side): Revision conflict: retained catalog value; confirm installed revision. Density inherits mass uncertainty. | 16-bit | | Complete actuator efficiency | Unknown: not documented. A manufacturer curve is available; boundary and revision unconfirmed. Source: model/topic scope & sources. | Unknown: not documented | | Cooling / thermal duty | Motor/MOS temperature telemetry only; not a thermal-duty measurement. Repeated duty/recovery unknown. Source: model/topic scope & sources. | Unknown: not documented | | Loaded repeatability | Unknown: not documented. Resolution/backlash are not loaded accuracy. Source: model/topic scope & sources. | Unknown: not documented | | Calibrated simulation model | Unknown: not documented. CAD available; not calibrated dynamics. Source: model/topic scope & sources. | Unknown: not documented | Sensor bits do not establish loaded accuracy. CAD geometry is not a calibrated simulation model. Verify thermal conditions, duty and exact revision before engineering use. Catalog photo; illustrative. Confirm hardware revision/variant. AK80-9 (V3.0 KV100): Revision conflict: unresolved. Catalog mass and encoder conflict with reviewed V3.0 documentation; confirm installed revision. Derived density inherits the mass conflict. Catalog entry names V3.0 KV100; retained values are not confirmed V3.0 specifications. GIM8108-8: Catalog headline specs spot-checked: confirm revision. The legacy verified flag is a catalog spot-check, not verification of every field, installed revision or independent performance validation. Catalog entry only; confirm the exact revision and operating conditions with the linked source. ## Engineering scope & sources ### AK80-9 (V3.0 KV100) / efficiency **Revision scope:** AK80-9 V3.0 KV100; installed hardware/firmware unconfirmed Manufacturer 48 VDC KV100 torque sweep plots efficiency, output power, current and varying speed; no numeric efficiency is digitized here. **Scope / unknowns:** Electrical-input boundary, temperature, cooling, duration, uncertainty and graph revision are unspecified. Complete bus-to-output efficiency remains unknown. - [Manufacturer operating curve](https://www.cubemars.com/images/20250424/1745462214935457.jpg): Image title AK80-9 KV100@48VDC; efficiency/output power/current/speed axes ### AK80-9 (V3.0 KV100) / thermal **Revision scope:** AK80-9 V3.0 KV100; installed hardware/firmware unconfirmed Manual exposes separate motor/MOS temperature and fault telemetry, and serial input voltage/current versus output and d/q currents. **Scope / unknowns:** Telemetry is not calibrated winding-hotspot metrology. Mounting-specific repeated duty, overload recovery and cooldown remain unknown; board and module limits are different scopes. - [AK manual V3.2.0](https://www.cubemars.com/data/cms/202602/ak-series-prodcut-manual-v3-2-0-for-ak-3-0-robotic-actuator.pdf): PDF pp47,50, section 4.3; temperature/fault and serial feedback fields ### AK80-9 (V3.0 KV100) / precision **Revision scope:** AK80-9 V3.0 KV100; installed hardware/firmware unconfirmed Manual p4 specifies 16-bit sensing, up to 21-bit with custom firmware; p8 still lists unqualified 21-bit. **Scope / unknowns:** This does not reconcile the retained 14-bit catalog or installed revision. Loaded output accuracy and bidirectional repeatability remain unknown; encoder resolution is not accuracy. - [AK manual V3.2.0](https://www.cubemars.com/data/cms/202602/ak-series-prodcut-manual-v3-2-0-for-ak-3-0-robotic-actuator.pdf): PDF p4 sensing/firmware qualifier; p8 family driver inner-loop encoder specification; p7 compatibility table ### AK80-9 (V3.0 KV100) / modeling **Revision scope:** AK80-9 V3.0 KV100; installed hardware/firmware unconfirmed Official archive contains AK80-9 V3.0.STEP geometry; manual documents no-load identification, parameter export and version inspection. **Scope / unknowns:** CAD and configuration are not calibrated dynamics. Published AK80-9 regressions use Dephy FASTER, not the stock V3.0 driver; neither coefficients nor bandwidth transfer. Held-out stock-model validation remains unknown. - [Official CAD](https://www.cubemars.com/data/cms/202602/ak80-9-v3-0-robotic-actuator-3d-drawing.zip): AK80-9 V3.0.STEP; AP214 HEADER identifies V3.0 KV100 - [AK manual V3.2.0](https://www.cubemars.com/data/cms/202602/ak-series-prodcut-manual-v3-2-0-for-ak-3-0-robotic-actuator.pdf): PDF pp17–21, sections 3.1.1–3.1.2; no-load identification and heating warning - [Nesler et al. 2022](https://locolab.robotics.umich.edu/documents/NeslerGregg-RAL2022.pdf): PDF pp4–5, section III.B–D, Fig7; legacy AK80-9/Dephy regression - [Zhao et al. 2024](https://locolab.robotics.umich.edu/documents/ZhaoWaltersGregg-BioRob2024.pdf): PDF pp2–5, section II.C–D, Table I; Dephy FASTER test configuration ## Arithmetic from catalog values Differences are subtraction of retained catalog values, not measured advantages. Ratings may have different test conditions. Unknown means not documented; manufacturer claims and catalog spot-checks are not independent validation. - Peak torque: AK80-9 (V3.0 KV100) (22 N·m) minus GIM8108-8 (22 N·m) = 0 N·m. - Rated torque: AK80-9 (V3.0 KV100) (9 N·m) minus GIM8108-8 (7.5 N·m) = 1.5 N·m. - Maximum speed: AK80-9 (V3.0 KV100) (570 rpm) minus GIM8108-8 (320 rpm) = 250 rpm. - Mass: AK80-9 (V3.0 KV100) (485 g) minus GIM8108-8 (375 g) = 110 g. Revision conflict: retained catalog value; confirm installed revision. Density inherits mass uncertainty. ## Catalog source links ### AK80-9 (V3.0 KV100) / catalog sources [Catalog-linked product page](https://www.cubemars.com/product/ak80-9-v3-0-robotic-actuator.html) · [Catalog-linked datasheet](https://www.cubemars.com/images/file/20240523/1716429938564781.pdf) ### GIM8108-8 / catalog sources [Catalog-linked product page](https://openelab.io/products/steadywin-gim8108-8-robot-motor) · [Catalog-linked datasheet](https://manuals.plus/ae/1005007128509920) ## Related catalog comparisons Catalog specifications and source caveats, not compatibility recommendations. - [AK10-9 (V3.0 KV60) vs AK80-9 (V3.0 KV100)](/comparisons/cubemars-ak10-9-vs-cubemars-ak80-9) - [AK10-9 (V3.0 KV60) vs GIM8108-8](/comparisons/cubemars-ak10-9-vs-steadywin-gim8108-8) - [AK70-10 (KV100) vs AK80-9 (V3.0 KV100)](/comparisons/cubemars-ak70-10-vs-cubemars-ak80-9) - [AK70-10 (KV100) vs GIM8108-8](/comparisons/cubemars-ak70-10-vs-steadywin-gim8108-8) - [AK80-6 (KV100) vs AK80-9 (V3.0 KV100)](/comparisons/cubemars-ak80-6-vs-cubemars-ak80-9) - [GIM6010-8 vs GIM8108-8](/comparisons/steadywin-gim6010-8-vs-steadywin-gim8108-8) [Browse actuator comparisons](/compare). 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