Robot joints and actuation
9 g position servo with 1.8 kgf·cm stall torque (1.7 kg·cm measured) over 180° on a 50 Hz PWM signal — light arm joints, pan-tilt heads and sensor sweeps, not load-bearing joints.
Engineering inference
Generic
SG90 9 g Micro Servo
SG90 9 g analog micro servo: 4.8–6 V supply (5 V typical), 180° travel, 1.8 kgf·cm stall torque per the datasheet (1.7 kg·cm measured by ProtoSupplies), 0.1 s/60°, 360 mA measured stall current, 10 mA idle, nylon gears, 22.2 x 11.8 mm case, 24 cm lead with a 3-pin 0.1″ connector.
SG90Development boardPrice$3.59protosupplies.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
- 100 RPM
- Encoder
- potentiometer
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Small grippers and fingers
22.2 x 11.8 mm case, 9 g and 1.8 kgf·cm stall torque fit a small claw or finger linkage where space matters more than force.
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)
- 32.2 × 11.8 × 32 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=16.5 mm assumed: spline position not dimensioned; scaled off the top-view drawing (≈16.5 of 22.2 mm) for the 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
- nylon gear train
- No-load speed
- 100 rpm
- Encoder
- potentiometer
- Control
- PWM · position (180°)
| Connector | Type |
|---|---|
| servo | 1×3 female connector for a 0.1″ male header, 24 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
- 100 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
- 32.2 mm
- Width
- 11.8 mm
- Reported height / thickness
- 32 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 connector for a 0.1″ male header, 24 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
$3.59Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 13, 2026, 05:05 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
SG90 micro servo with horns, screws and lead (ProtoSupplies photo) (opens in a new tab)
Unverified reference
inspected: blue SG90 case labelled Micro Servo 9g SG90, 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 94418d40525d405725689b5d752131e01398b5c1dfe1c4b4fad0e3ce6595ba4f
Supports: offers
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FAQ
SG90 9 g Micro Servo questions
How much does the SG90 9 g Micro Servo cost?
From $3.59 at protosupplies.com. Prices are observed unit prices before tax and shipping.
What are the SG90 9 g Micro Servo dimensions?
32.2 × 11.8 × 32 mm. A STEP model is available for enclosure fit checks.
Where does this SG90 9 g 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.