Product Selection

Do not select a servo by headline stall torque alone. A viable choice must satisfy interface, voltage, continuous load, speed, size, travel, feedback and environment requirements together.

Servo selector

Find your FEETECH servoFilter instantly and compare candidate models.

Professional selectionReset filters

Search model Control interfaceAllProduct familyAllInput voltageAll Minimum stall torque · kg·cm Minimum no-load speed · rpm

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Selection note

Use the results to compare products quickly. Open the model page for full specifications and allow design margin for load, duty cycle, temperature and mechanism conditions.

Six filters

1. Control: use PWM for conventional pulse control; use a bus servo for addressing, daisy chaining, feedback and configuration.
2. Physical interface: TTL is common inside compact robots; consider RS485 for longer links or noisy environments. Match the existing controller.
3. Power: use the exact model's rated voltage and size the supply for peak current and simultaneous motion.
4. Mechanics: calculate torque at the real lever arm, including gravity, acceleration, friction, impacts and margin.
5. Motion: verify speed, travel, continuous-rotation requirements, resolution and encoder type.
6. Integration: verify envelope, shaft, mass, mounting, gears, protection and operating temperature.

Torque estimate

required torque (kg·cm) ≈ load (kg) × arm (cm) × safety factor

A 1 kg load at 10 cm is 10 kg·cm statically. Real mechanisms need allowance for dynamics and should not operate continuously near stall torque.

Selection worksheet

Constraint	Requirement	Candidate
Interface	PWM / TTL / RS485 / other
Supply	V
Continuous/peak torque	kg·cm or N·m
Speed	s/60° or RPM
Motion	limited / multi-turn / continuous
Feedback	position / speed / load / voltage / temperature
Maximum size and mass	mm / g
Platform	PC / Arduino / ESP32 / Linux / STM32

Use the official product catalog for application information, then compare candidate models in the product specifications catalog.

Need	Start with	Note
Conventional RC control	PWM series	Simple wiring; no bus addressing
Education and desktop robots	SCS / STS TTL	Daisy chaining and feedback; model details vary
Magnetic encoder/high resolution	STS TTL	Several models provide 360° magnetic sensing
Larger or electrically noisy systems	SMS RS485	Differential bus; requires an RS485 interface
Specific high-performance TTL use	HLS TTL	Use the HLS application layer and memory table

Note

Product offerings change over time. Confirm current availability and application requirements with FEETECH before final selection.