Robot joints and actuation
13.4 g metal-gear position servo, 2.2 kgf·cm stall at 6 V over 180° on 50 Hz PWM — small arm joints, pan-tilt heads and legged-robot toys where SG90 nylon gears strip.
Engineering inference
Generic
MG90S Metal Gear Micro Servo
MG90S metal-gear micro servo: 4.8–6 V, 180° travel, 1.8 kg·cm stall at 4.8 V and 2.2 kg·cm at 6 V (Tower Pro spec), 0.10 s/60° at 4.8 V, 700 mA stall and 10 mA idle measured by ProtoSupplies, 13.4 g, 22.8 x 12.4 mm case — the metal-gear upgrade of the SG90 with the same footprint class.
MG90SDevelopment boardPrice$5.49protosupplies.com · in stock
Buy at protosupplies.com Overview
Motor essentials
Facts about the complete product. Unknown values remain open design questions.
- Rated voltage
- 6 V
- No-load speed
- 125 RPM
- Encoder
- potentiometer
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Small grippers and fingers
22.8 x 12.4 mm case and metal gears at 2.2 kgf·cm suit a small claw that holds against a load; budget 700 mA stall current.
Engineering inferenceNo-load speed, rated performance and stall limits describe different operating points. A stall specification is not a continuous operating rating.
3D model & CAD
3D model & CAD files
Generated from the datasheet's dimensioned drawing and measured against it. Download the STEP to check fit in your own enclosure.
- Envelope (L × W × H)
- 32.1 × 12.4 × 32.5 mm
- Verification
- generated
- Envelope complete
- No — some heights assumed
ear_thickness=2.5 mm assumed: ear thickness not dimensioned — 2.5 mm assumed for the CAD envelope only output_offset_x=16.8 mm assumed: spline position not dimensioned; about three quarters along the case on the top-view drawing — CAD envelope only shaft_d=4.8 mm assumed: spline diameter not dimensioned — 4.8 mm assumed for the CAD envelope only
Torque & control
Torque, speed and control
What the joint can deliver and how the controller talks to it.
- Type
- PWM_SERVO
- Gearbox
- metal gear train
- No-load speed
- 125 rpm
- Encoder
- potentiometer
- Control
- PWM · position (180°)
| Connector | Type |
|---|---|
| servo | 1×3 female JR-type servo plug on a 24–25 cm lead |
Rated torque is continuous; peak torque is short-duration. Values with two figures (e.g. 24/48 V) are per supply voltage.
Specifications
Motor performance
No-load, rated-load and stall figures retain their separate test conditions.
- Rated voltage
- 6 V
- No-load speed
- 125 RPM
Stall torque and current are not continuous ratings. Check the duty cycle and starting load when choosing the driver and power supply.
Thermal limits by level
Product operating conditions, chip ambient ratings, package case limits and junction maxima remain separate.
Motor body
- Product operating range
- 0 to 55 °C
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 32.1 mm
- Width
- 12.4 mm
- Reported height / thickness
- 32.5 mm
Attached generated geometry is an approximate envelope. A generated outline does not establish an electrically verified PCB footprint.
Board connectors
| ID / type | Pins | Pitch | Notes |
|---|---|---|---|
| servo1×3 female JR-type servo plug on a 24–25 cm lead | 3 | 2.54 mm | — |
Complete structured record
Every available field, including details beyond the summaries. Null means the value has not been established.
Sourcing & files
Supplier offers
US / USD is the target market. Observed price and stock are separate from a delivery quote.
protosupplies.com
US · USD
$5.49Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 13, 2026, 05:09 AM UTC
- Delivery estimate
- Not quoted
This observation is stale or has no verified check time. Recheck with the supplier.
Visit supplier (opens in a new tab)Delivery depends on quantity, postal code and shipping method. A dispatch statement such as “ship today” is not an arrival estimate.
Design files and references
Each source keeps its own verification status. Confirm the part revision and file contents before using it in a design.
Datasheet (opens in a new tab)
Manufacturer reference
MG90S micro servo with horns, screws and lead (ProtoSupplies photo) (opens in a new tab)
Unverified reference
inspected: black MG90S case labelled MG90S Micro servo, metal spline, 3 horns, screws, brown/red/orange lead
STEP (generated from datasheet drawing) — link unavailable
Generated asset
cad_check passed
Generated envelope geometry may also exist for this record. It does not replace manufacturer CAD or a verified electrical land pattern.
Source evidence
Document provenance, retrieval dates and the field groups supported by each source.
Supports: spec.constraints.electrical.supply_voltage_nominal_v, spec.constraints.thermal.operating_temp_max_c, spec.constraints.thermal.operating_temp_min_c, spec.geometry.body_length_mm, spec.geometry.cad.assumptions, spec.geometry.cad.bbox.height_mm, spec.geometry.cad.bbox.length_mm, spec.geometry.cad.bbox.width_mm, spec.geometry.cad.envelope_complete, spec.geometry.cad.mesh_path, spec.geometry.cad.step_path, spec.geometry.cad.verification, spec.geometry.dimensions.height_mm, spec.geometry.dimensions.length_mm, spec.geometry.dimensions.width_mm, spec.geometry.other.weight_g, spec.provides.actuator_type, spec.provides.control_interface, spec.provides.control_modes, spec.provides.encoder, spec.provides.features, spec.provides.gear_type, spec.provides.integrated_driver, spec.provides.motor_type, spec.provides.no_load_speed_rpm, spec.provides.peak_torque_nm, spec.usage.connectors, spec.usage.pinout, spec.usage.pinout_complete, spec.usage.requirements.other.peak_current_a, spec.usage.requirements.rated_voltage_v
sha256 550f6cc993af3765087723fb8b5c13bc7bdeec9229c8ab1b5450e5eab6761244
Supports: offers
FAQ
MG90S Metal Gear Micro Servo questions
How much does the MG90S Metal Gear Micro Servo cost?
From $5.49 at protosupplies.com. Prices are observed unit prices before tax and shipping.
What are the MG90S Metal Gear Micro Servo dimensions?
32.1 × 12.4 × 32.5 mm. A STEP model is available for enclosure fit checks.
Where does this MG90S Metal Gear Micro Servo data come from?
Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.