Part comparison

ROBOTIS AX-18A vs ROBOTIS MX-28

A side-by-side comparison of source-backed specifications within the same subcategory.

13 shared specs3 scored

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ROBOTISROBOTIS AX-18AAX-18A

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ROBOTISROBOTIS MX-28MX-28

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Directional spec summary

Counts across 3 numeric specifications with a clear higher-or-lower direction.

Part A leads

Tied

Part B leads

These are metric-by-metric differences, not an overall performance score. Check the values below.

Specifications

13 specifications compared side by side.

ROBOTIS AX-18A / ROBOTIS MX-28
Compare bySpecification	AROBOTISROBOTIS AX-18A	BROBOTISROBOTIS MX-28
Physical1
Weight	-18 g	-28 g10 g lower
Performance2
Stall torque	1.8 Nm	2.3 Nm0.5 Nm higher
Maximum speed	97 rpm47 rpm higher	50 rpm
Electrical3
Nominal voltageUse-dependent	11.1 V	12 V
Minimum voltageUse-dependent	9 V	10 V
Maximum voltageUse-dependent	12 V	14.8 V
Mechanical & integration4
Motor kind	Smart servo	Smart servo
Drive principle	servo actuator	servo actuator
Architecture	Integrated motor controller reducer network	Integrated motor controller reducer network
Gear ratioUse-dependent	254:1	193:1
Control & communication3
Encoder	integrated position sensor	integrated position sensor
Communication interfacesUse-dependent	TTL	RS485
Control modes	position;velocity;current/PWM;feedback	position;velocity;current/PWM;feedback

AROBOTISROBOTIS AX-18A

BROBOTISROBOTIS MX-28

Physical1

Weight

Part A-18 g

Part B-28 g10 g lower

Performance2

Stall torque

Part A1.8 Nm

Part B2.3 Nm0.5 Nm higher

Maximum speed

Part A97 rpm47 rpm higher

Part B50 rpm

Electrical3

Nominal voltageUse-dependent

Part A11.1 V

Part B12 V

Minimum voltageUse-dependent

Part A9 V

Part B10 V

Maximum voltageUse-dependent

Part A12 V

Part B14.8 V

Mechanical & integration4

Motor kind

Part ASmart servo

Part BSmart servo

Drive principle

Part Aservo actuator

Part Bservo actuator

Architecture

Part AIntegrated motor controller reducer network

Part BIntegrated motor controller reducer network

Gear ratioUse-dependent

Part A254:1

Part B193:1

Control & communication3

Encoder

Part Aintegrated position sensor

Part Bintegrated position sensor

Communication interfacesUse-dependent

Part ATTL

Part BRS485

Control modes

Part Aposition;velocity;current/PWM;feedback

Part Bposition;velocity;current/PWM;feedback

Product sources

Product sources used by this comparison

ROBOTIS AX-18AOpen source ↗

ROBOTIS MX-28Open source ↗