Mobile robot drive trains
37 mm 12 V gearmotor at 10:1 — a drive for mid-size wheeled robots (add an external encoder or use the encoder version for closed loop).
Engineering inference
Pololu
Pololu #4748 10:1 37D Gearmotor
Pololu #4748 is a 12 V brushed DC 37D metal gearmotor (no encoder) with 10:1 reduction (helical first stage), 1000 rpm no-load output, 4.9 kg·cm extrapolated stall torque, 5.5 A extrapolated stall current, 6 mm D-shaft, six M3 face holes, two solder-tab terminals, 37 mm × 50 mm, 175 g.
4748MotorPrice$38.95www.pololu.com · in stock
Buy at www.pololu.com Overview
Motor essentials
Facts about the complete product. Unknown values remain open design questions.
- Rated voltage
- 12 V
- No-load speed
- 1,000 RPM
- Stall torque
- 0.48053 N·m
- Gear reduction
- 10:1
- Shaft diameter
- 6 mm
- Encoder
- none
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
No-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)
- 37 × 37 × 66 mm
- Verification
- generated
- Envelope complete
- Yes
Mechanical interface
Mechanical output interface
The motor body, transmission and output shaft have separate roles in a mechanism.
- Motor type
- gearmotor
- Gear reduction
- 10:1
- Shaft diameter
- 6 mm
- Body diameter
- 37 mm
- Body length
- 50 mm
- Encoder
- none
Reported body dimensions may exclude the shaft, terminals and other protrusions. Use the manufacturer drawing to establish the complete mounting and clearance envelope.
Specifications
Motor performance
No-load, rated-load and stall figures retain their separate test conditions.
- Rated voltage
- 12 V
- No-load speed
- 1,000 RPM
- No-load current
- 0.2 A
- Stall torque
- 0.48053 N·m
- Stall current
- 5.5 A
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
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 37 mm
- Width
- 37 mm
- Reported height / thickness
- 66 mm
- Mounting hole records
- 6
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 |
|---|---|---|---|
| terminalstwo solder tabs on the motor end cap | 2 | Unknown | — |
Software and certifications
- Recorded certifications
- RoHS 3 compliant
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.
www.pololu.com
US · USD
$38.95Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 1, 2026, 11:51 PM UTC
- Delivery estimate
- Not quoted
Observed within the last 24 hours. Confirm the current supplier quote.
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
Pololu #4748 10:1 37D gearmotor (no encoder) (opens in a new tab)
Manufacturer reference
inspected: maker product photo
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.compliance.certifications, spec.constraints.electrical.supply_voltage_nominal_v, spec.geometry.body_diameter_mm, spec.geometry.body_length_mm, 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.mounting_holes, spec.geometry.other.weight_g, spec.geometry.shaft_diameter_mm, spec.geometry.shaft_extension_mm, spec.provides.features, spec.provides.feedback, spec.provides.gear_ratio, spec.provides.motor_type, spec.provides.no_load_speed_rpm, spec.provides.output_type, spec.provides.stall_torque_nm, spec.usage.connectors, spec.usage.pinout, spec.usage.pinout_complete, spec.usage.requirements.driver_required, spec.usage.requirements.no_load_current_a, spec.usage.requirements.rated_voltage_v, spec.usage.requirements.stall_current_a
sha256 c83181cc9e00af2a97788029dc364f114d672d4eb33c2dd4340b1676489920b1
Supports: offers
FAQ
Pololu #4748 10:1 37D Gearmotor questions
How much does the Pololu #4748 10:1 37D Gearmotor cost?
From $38.95 at www.pololu.com. Prices are observed unit prices before tax and shipping.
What are the Pololu #4748 10:1 37D Gearmotor dimensions?
37 × 37 × 66 mm. A STEP model is available for enclosure fit checks.
Where does this Pololu #4748 10:1 37D Gearmotor 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.