01
RA1–RA7
Right-Angle Gearmotors
Compact PMDC, BLDC and AC geared platforms with space-saving 90° output arrangements.
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Genuine SDT product overview
Gearmotor Product Families
Start with the required output speed, continuous and peak torque, duty and mechanical arrangement; then select the closest motor-and-gearbox family for detailed review.
02
S1–S4
Compact Inline & Parallel-Shaft Gearmotors
Compact inline and offset parallel-shaft PMDC gearmotors from 50 W to 750 W for space-conscious OEM equipment.
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03
Coaxial precision drive
Planetary Gearmotors
Compact, high-torque-density planetary solutions combined with PMDC, BLDC or servo motors.
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04
Application-specific integration
Custom Motor & Gearbox Solutions
Motor, ratio, shaft, mounting, brake, feedback and control interfaces coordinated around the equipment.
Explore More →PMDC, brushless DC and AC right-angle gearmotors
Right-Angle Series — RA1 to RA7
Eight model-matched products, including the RA1-New platform, presented at a consistent scale and orientation. Open the technical comparison when detailed ratings are required.
RA1–RA7 Technical ComparisonCompare motor technology, frame, power, output speed, voltage and configuration notes
| Model | Motor technology | Motor diameter / frame (mm) | Rated motor power (W) | Nominal output speed (rpm) | Supply voltage (V) |
|---|---|---|---|---|---|
| RA1 | PMDC / BLDC | 63 | 100 | 120 | 12/24 DC |
| RA1-New | PMDC / BLDC | 63 | 100 | 120 | 12/24 DC |
| RA2 | PMDC | 63 | 180 | 150 | 12/24 DC |
| RA3 | PMDC / BLDC | 70 | 250 | 200 | 12/24 DC |
| RA4 | PMDC / BLDC | 70 | 350 | 150 | 12/24 DC |
| RA5 | PMDC / BLDC / AC | 90 | 550 | 180 | 12/24 DC; custom windings up to 230 AC |
| RA6 | BLDC | 110 | 750 | 250 | 12–48 DC |
| RA7 | AC induction / synchronous PM | IEC frame—configuration dependent | 1,200–8,000 | Up to 500 | 230 AC |
Custom configurations: Motor technology, winding voltage, rated power, gear ratio, output speed, shaft, mounting, brake, feedback and protection can be tailored to the OEM application. Where an established platform is unsuitable, SDT can support a clean-sheet solution from concept through validation and production supply.
Technical note: Ratings shown are representative family values. Final power, output speed, torque, ratio, voltage and operating duty are confirmed against the selected motor and gearbox configuration.
Right-Angle Gearmotor Technical DataRequest the representative RA1–RA7 motor, frame, power, output-speed and supply information.
Technical dataRequest Technical Data →Compact inline and parallel-shaft gearmotors
S1–S4 Motor Models
Representative PMDC gearmotor platforms presented with standardised orientation, scale and image alignment for reliable family comparison.
S1–S4 Technical ComparisonCompare ratings, selection checks and application-specific configuration guidance
| Model | Motor technology | Motor diameter / frame (mm) | Rated motor power (W) | Nominal output speed (rpm) | Supply voltage (V) |
|---|---|---|---|---|---|
| S1 | PMDC | 60 | 50 | Up to 150 | 12 DC |
| S2 | PMDC | 90 | 400 | Up to 200 | 24 DC |
| S3 | PMDC | 90–105 | 160 | Up to 200 | 24 DC |
| S4 | PMDC | 124 | 750 | Up to 150 | 24 DC |
Confirm for final selection
Custom configurations: Motor winding, gear ratio, output speed, shaft, mounting arrangement, brake, feedback and protection can be tailored to the OEM application.
Technical note: Ratings shown are representative family values. Model numbers identify mechanical platforms and do not indicate ascending power. Final power, output speed, continuous and peak torque, ratio, voltage, shaft loading and operating duty are confirmed against the selected motor and gearbox configuration.
Compact coaxial transmission
Planetary Gearmotor Configurations
Actual supplied product examples presented in the same comparison format as the S range. SDT combines planetary gearheads with PMDC, brushless DC and servo motors around the required output and duty.
Planetary Selection DetailsCompare configurations, torque, backlash, loading, efficiency and duty checks
| Configuration | Motor technology | Gearhead arrangement | Technical selection parameters |
|---|---|---|---|
| Compact PMDC | PMDC | Compact cylindrical coaxial | Voltage, ratio, output speed, torque and shaft interface |
| Integrated BLDC | Brushless DC | Integrated inline planetary | Ratio, control method, feedback, duty and thermal capacity |
| Servo Planetary | Servo / BLDC | Precision flange-mounted planetary | Backlash, ratio, inertia, flange and positioning duty |
| Flange PMDC | PMDC | Square-flange coaxial | Ratio, shaft loads, mounting, voltage and operating cycle |
Confirm for final selection
Technical note: Planetary gearhead diameter, ratio, stages, output speed, continuous and peak torque, backlash, efficiency, maximum input speed, radial and axial loads, service life and thermal duty are confirmed against the application before a specific configuration is proposed.
Planetary Gearmotor Technical DataRequest the representative planetary configurations, torque, backlash, loading, efficiency and duty information.
Technical dataRequest Technical Data →Industrial Gear Motors
01Power coverage
Indicative 0.12–55 kW industrial AC gearmotor coverage, subject to gearbox, ratio and duty.
02Gear arrangements
Inline helical, parallel-shaft, right-angle, worm and bevel arrangements selected around the equipment.
03Mounting & interface
Foot, flange, solid-shaft and application-specific output interfaces coordinated with the installation.
04Application selection
Output torque, service factor, mounting, environment and certification confirmed for each project.
Selection basis: Motor power alone does not define gearbox capacity. Final continuous and peak output torque, ratio, thermal duty, external shaft loads and service life are confirmed for the selected motor-and-gearbox platform.
Industrial Gear Motor Technical DataRequest the representative power coverage, gearbox arrangements, mounting and application-selection information.
Technical dataRequest Technical Data →Select by mechanical arrangement
Choose the Gearbox Architecture Around the Equipment
Compare the installation logic first, then confirm the ratio, loads, efficiency, thermal duty and service life. Hover, focus or tap each arrangement for its selection consequence.
Duty-led product guidance
Preliminary Selection Framework
Start with the supply, load cycle and output requirement, then open the comparison framework when detailed guidance is needed.
Preliminary Selection FrameworkCompare motor and gearbox approaches, typical supply, benefits and confirmation requirements
| Motor & gearbox approach | Typical supply | Best suited to | Primary benefits | Confirm during selection |
|---|---|---|---|---|
| PMDC + spur / parallel-shaft / planetary | 12–48 V DC; higher-voltage windings available | Simple speed control, cyclic duty and strong starting torque | Compact, cost-effective and readily customised | Continuous and peak torque, current, brush life, ratio and thermal duty |
| BLDC + planetary / worm | DC supply with electronic controller | High-cycle, variable-speed and long-life operation | Efficiency, controllability and feedback integration | Controller, continuous and peak torque, backlash, ratio and temperature |
| AC / synchronous PM + helical / worm | AC supply; inverter control where required | Continuous industrial duty and higher-power equipment | Robust operation and broad power capability | Supply, frequency, service factor, efficiency, mounting and protection |
| Application-specific integrated unit | Matched to the equipment | Restricted envelope or specialised mechanical interface | Motor, gearbox and controls engineered as one system | Full load cycle, shaft forces, braking, feedback, environment and production volume |
Selection note: Final ratio and motor power are selected only after required output speed, continuous and peak torque, starts per hour, duty cycle, gearbox efficiency, service factor, radial and axial shaft loads, thermal conditions and required service life have been reviewed.
Where gearmotors fit
Application and Technical Guidance
Review representative applications and the information SDT needs for an effective preliminary selection.
Application and Technical GuidanceReview main applications and the six essential inputs for preliminary selection
Main Applications
Conveyors & Material HandlingTransport, transfer and indexing with controlled low-speed torque
Packaging MachineryFeeding, sealing, labelling and repeatable machine movements
Robotics & AutomationPositioners, grippers and compact auxiliary axes
Doors, Gates & ActuatorsReversible motion, holding and restricted installation envelopes
Medical & Mobility EquipmentQuiet, controlled and application-specific movement
Pumps & Dosing EquipmentStable low-speed drive for metering and fluid-handling mechanisms
Commercial EquipmentReliable repeated operation in compact equipment platforms
Information for preliminary selection
Start with the Output Requirement
These inputs allow SDT to assess the motor technology, transmission type, ratio, mechanical interface and level of customisation required.
01Output speed & torque
02Operating duty cycle
03Available power supply
04Installation envelope
05Shaft & external loads
06Application environment
Complementary drive and control
A Complete Geared Motion Solution
Where required, the selected gearmotor can be supplied with a matched speed controller, inverter, feedback device or brake as part of the complete motor solution.
Define the right geared solution
Share Your Application Requirements
Provide the output speed and torque, duty cycle, input power source, mounting envelope, shaft arrangement and application environment.