--- title: "EC-A4310-P2-36 vs RMD-X8 Pro V2 (1:9)" description: "Compare EC-A4310-P2-36 and RMD-X8 Pro V2 (1:9): catalog torque, mass, speed, price and source/revision caveats. Not a matched-condition test or compatibility recommendation." canonical: https://actuatorlist.com/comparisons/encos-ec-a4310-p2-36-vs-myactuator-rmd-x8-pro-v2 last-updated: 2026-11-01T14:05:43.000Z --- # EC-A4310-P2-36 vs RMD-X8 Pro V2 (1:9) Compare EC-A4310-P2-36 and RMD-X8 Pro V2 (1:9): catalog torque, mass, speed, price and source/revision caveats. Not a matched-condition test or compatibility recommendation. Unknown means not documented, not zero. ## EC-A4310-P2-36 ![EC-A4310-P2-36: illustrative catalog photo; revision/variant unconfirmed](/actuator-images/encos-ec-a4310-p2-36.webp) [Catalog and sources](/actuators/encos-ec-a4310-p2-36) ## RMD-X8 Pro V2 (1:9) ![RMD-X8 Pro V2 (1:9): illustrative catalog photo; revision/variant unconfirmed](/actuator-images/myactuator-rmd-x8-pro-v2.webp) [Catalog and sources](/actuators/myactuator-rmd-x8-pro-v2) ## Specifications | Specification | EC-A4310-P2-36 | RMD-X8 Pro V2 (1:9) | | --- | --- | --- | | Peak torque (catalog) | 36 N·m | 25 N·m | | Rated torque (catalog) | 12 N·m | 13 N·m: Revision conflict: retained 13 N·m legacy rating; current X8-25 documents specify 10 N·m. Applicability unconfirmed. | | Maximum speed (catalog) | 89 rpm | 160 rpm: Revision conflict: retained 160 rpm legacy no-load value; current curve lists 254.3 rpm at 48.14 V. Applicability unconfirmed. | | Mass | 382 g | 710 g | | Gear ratio | 36:1 | 9:1 | | Voltage | 24-48 V | 24-48 V: Revision conflict: retained 24–48 V legacy range; current actuator sheet specifies 48 V. Driver range is not actuator rating. | | Price (catalog, not a live quote) | 700 USD | 557.24 USD | | Encoder (resolution is not accuracy) | dual encoder | 18-bit magnetic: Revision conflict: current 240814 sheet says 16-bit, while 241227 manual says 18 bits. Confirm installed revision; resolution is not accuracy. | | Complete actuator efficiency | Unknown: not documented | Unknown: not documented. A manufacturer curve is available; boundary and revision unconfirmed. Source: model/topic scope & sources. | | Cooling / thermal duty | Unknown: not documented | Current 10 N·m rating: 24 °C ambient / 60 °C rise; not confirmed for legacy 13 N·m. Repeated duty/recovery unknown. Source: model/topic scope & sources. | | Loaded repeatability | Unknown: not documented | Unknown: not documented. Resolution/backlash are not loaded accuracy. Source: model/topic scope & sources. | | Calibrated simulation model | Unknown: not documented | Unknown: not documented. CAD available; not calibrated dynamics. Source: model/topic scope & sources. | 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. EC-A4310-P2-36: Unverified catalog: confirm sources. 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. RMD-X8 Pro V2 (1:9): Revision conflict: unresolved. Current X8-25 alias does not establish unchanged legacy winding/driver/firmware or rating applicability. Retained torque, speed, voltage, encoder and IP54 values require revision/variant confirmation. Peak-based density uses matching 25 N·m and 0.710 kg; rated-torque conflict does not change it. Catalog entry only; confirm the exact revision and operating conditions with the linked source. ## Engineering scope & sources ### RMD-X8 Pro V2 (1:9) / efficiency **Revision scope:** RMD-X8-Pro 1:9 V2 / current X8-25 alias; unchanged winding/driver/firmware not established Current X8-25 curve prints 80.8%, 7.19 N·m, 242.0 rpm, 47.99 V, 4.676 A, 224.36 W input and 181.30 W output; source arithmetic discrepancy: torque × angular speed gives 182.21 W and 81.21% of printed input, not the printed output/efficiency. **Scope / unknowns:** Printed values are retained, not corrected; not a coherent verified operating point. Current characteristic sweep only; applicability to the legacy catalog unit is unconfirmed. Electrical metering location, driver/cable loss boundary, thermal state, dwell and uncertainty are unspecified; not a verified bus-to-output map or continuous-duty guarantee. - [X8-25 product archive](https://www.myactuator.com/_files/archives/cab28a_85824a1893de4b058080c363664a1c9f.zip): 240814 product parameter PDF p1, Motor Characteristic Curve summary/table - [X Series V2 manual archive](https://www.myactuator.com/_files/archives/cab28a_82abda57fa5a4db1b99e86d416ba2e94.zip): X Series-V2 Product Manual-241227.pdf, PDF p5 / printed E-11/12, characteristic curve ### RMD-X8 Pro V2 (1:9) / thermal **Revision scope:** RMD-X8-Pro 1:9 V2 / current X8-25 alias; unchanged winding/driver/firmware not established Current rated-torque footnote specifies 24 °C ambient, no other heat dissipation, rated speed and 60 °C rise to thermal equilibrium. **Scope / unknowns:** Applies to current 10 N·m / 110 rpm, not the legacy 13 N·m rating without confirmation. Sensor location, fixture conduction, equilibrium criterion, repeated peak duty and recovery remain unknown. - [X Series V2 manual archive](https://www.myactuator.com/_files/archives/cab28a_82abda57fa5a4db1b99e86d416ba2e94.zip): X Series-V2 Product Manual-241227.pdf, PDF p5 / E-11/12, rated-torque footnote ### RMD-X8 Pro V2 (1:9) / precision **Revision scope:** RMD-X8-Pro 1:9 V2 / current X8-25 alias; unchanged winding/driver/firmware not established 240814 sheet says 16-bit input encoder; 241227 manual/current page say 18 bits. Current backlash is 10 arcmin versus legacy 5 arcmin. **Scope / unknowns:** Installed revision remains unresolved. Encoder resolution/backlash do not establish loaded output accuracy or bidirectional repeatability; those remain unknown. - [X8-25 product archive](https://www.myactuator.com/_files/archives/cab28a_85824a1893de4b058080c363664a1c9f.zip): 240814 product parameter PDF p1, encoder/backlash table - [X Series V2 manual archive](https://www.myactuator.com/_files/archives/cab28a_82abda57fa5a4db1b99e86d416ba2e94.zip): X Series-V2 Product Manual-241227.pdf, PDF p5, encoder/backlash table - [Legacy manufacturer manual (RobotShop mirror)](https://cdn.robotshop.com/media/M/Mya/RBC-Mya-19/pdf/RMD-X%20V2%20Series%20Product%20Manual.pdf): PDF p9 / printed pp15–16, X8-Pro V2 1:9, item A00085; revision date unresolved ### RMD-X8 Pro V2 (1:9) / modeling **Revision scope:** RMD-X8-Pro 1:9 V2 / current X8-25 alias; unchanged winding/driver/firmware not established Official X8-25 archive contains drawings and AP214 STEP geometry whose HEADER identifies RMD-X8pro-P9 V2.step, exported by SolidWorks 2020. **Scope / unknowns:** Geometry/tabulated inertia are not identified friction, compliance, control delay or validated sim2real dynamics. Driver V3 / protocol V4.2 cover does not establish compatibility with the catalog MC-X-300-O hardware/firmware; calibrated model remains unknown. - [X8-25 product archive](https://www.myactuator.com/_files/archives/cab28a_85824a1893de4b058080c363664a1c9f.zip): Archive drawing/STEP members; RMD-X8pro-P9 V2.step HEADER, 2023-12-27 - [Driver/protocol archive](https://www.myactuator.com/_files/archives/cab28a_82abda57fa5a4db1b99e86d416ba2e94.zip): MC driver manual V3.0 cover; protocol PDF p1, Applicable driver V3 / Version V4.2 / 2024.05 ## 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: EC-A4310-P2-36 (36 N·m) minus RMD-X8 Pro V2 (1:9) (25 N·m) = 11 N·m. - Rated torque: EC-A4310-P2-36 (12 N·m) minus RMD-X8 Pro V2 (1:9) (13 N·m) = -1 N·m. Revision conflict: retained 13 N·m legacy rating; current X8-25 documents specify 10 N·m. Applicability unconfirmed. - Maximum speed: EC-A4310-P2-36 (89 rpm) minus RMD-X8 Pro V2 (1:9) (160 rpm) = -71 rpm. Revision conflict: retained 160 rpm legacy no-load value; current curve lists 254.3 rpm at 48.14 V. Applicability unconfirmed. - Mass: EC-A4310-P2-36 (382 g) minus RMD-X8 Pro V2 (1:9) (710 g) = -328 g. ## Catalog source links ### EC-A4310-P2-36 / catalog sources [Catalog-linked product page](https://aifitlab.com/products/encos-ec-a4310-p2-36-motor) ### RMD-X8 Pro V2 (1:9) / catalog sources [Catalog-linked product page](https://www.robotshop.com/products/my-actuator-rmd-x8-pro-v2-can-bus-bldc-actuator-w-19-reduction-mc-x-300-o-driver) · [Catalog-linked datasheet](https://www.myactuator.com/x8-25-details) ## Related catalog comparisons Catalog specifications and source caveats, not compatibility recommendations. - [DM-J4340-2EC vs EC-A4310-P2-36](/comparisons/damiao-dm-j4340-2ec-vs-encos-ec-a4310-p2-36) - [DM-J4340P-2EC vs EC-A4310-P2-36](/comparisons/damiao-dm-j4340p-2ec-vs-encos-ec-a4310-p2-36) - [EC-A4310-P2-36 vs MG5010E-i36 V3](/comparisons/encos-ec-a4310-p2-36-vs-lkmtech-mg5010e-i36-v3) - [EC-A4310-P2-36 vs GIM6010-36 (48V)](/comparisons/encos-ec-a4310-p2-36-vs-steadywin-gim6010-36) - [MG5010E-i36 V3 vs RMD-X8 Pro V2 (1:9)](/comparisons/lkmtech-mg5010e-i36-v3-vs-myactuator-rmd-x8-pro-v2) - [RMD-X8 Pro V2 (1:9) vs GIM6010-36 (48V)](/comparisons/myactuator-rmd-x8-pro-v2-vs-steadywin-gim6010-36) [Browse actuator comparisons](/compare). 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