15 mm
Compact motor frame
A small 15 mm motor body and 15 g nominal weight help reduce the size and moving mass of compact equipment.
SP15PM 15 mm Permanent Magnet Linear Actuator
Permanent Magnet Linear Actuator
Compact 15 mm permanent magnet linear actuator with an 18° step angle, 0.5 or 1.0 mm lead, and fixed-nut or external-drive options for guided precision mechanisms.
Positioning accuracy
High torsional rigidity and constant torsional backlash over the entire gearbox service life ensure consistently high performance
Compactness
High torque density thanks to high performance and short design
Low maintenance
Highest quality standards for a long service life and extended maintenance intervals
Technical data
15 mm permanent magnet linear actuator
Compact lead-screw actuation for space-limited mechanisms
The SP15PM converts 18° permanent-magnet stepper motion into controlled linear travel. Fixed-nut and external-drive configurations support compact positioning, adjustment and dispensing mechanisms.
0.025 / 0.05 mm
Two travel increments
AD and AB lead options provide two full-step travel values for balancing linear resolution, speed and available thrust.
2 configurations
Flexible mechanical integration
Choose a fixed-nut or external-drive arrangement with threaded, plain, unmachined or customer-specific screw-end machining.
Technical data
SP15PM electrical and linear-motion specifications
15 mmFrame size
Up to 8 NReference thrust
0.5–1.0 mmLead range
Fixed / ExternalConfigurations
Electrical platform
Motor characteristics
| Parameter | 4 V winding | 5 V winding | 12 V winding |
|---|---|---|---|
| Motor type | Bipolar permanent-magnet stepper | ||
| Drive configuration | Fixed-nut / External-drive | ||
| Step angle | 18° | ||
| Phase current | 200 mA | 160 mA | 70 mA |
| Phase resistance | 20 Ω | 33 Ω | 180 Ω |
| Phase inductance | 506 mH | 8.7 mH | 49 mH |
| Power | 1.6 W | ||
| Rotor inertia | 1 g·cm² | ||
| Insulation class | Class E | ||
| Insulation resistance | 100 MΩ | ||
| Weight | 15 g | ||
Linear travel selection
Available leads and travel per full step
| Lead code | Lead (mm) | Lead (in) | Travel per 18° step (mm) | Travel per step (in) |
|---|---|---|---|---|
| AD | 0.5 | 0.0197 | 0.025 | 0.000985 |
| AB | 1.0 | 0.0394 | 0.05 | 0.00197 |
Reference test points
Speed and pulse-rate relationship
| Motor speed (RPM) | 600 | 1200 | 1800 | 2400 | 3000 | 3600 |
|---|---|---|---|---|---|---|
| Pulse rate (PPS) | 200 | 400 | 600 | 800 | 1000 | 1200 |
| AD linear speed (mm/s) | 5 | 10 | 20 | 30 | 40 | 50 |
| AB linear speed (mm/s) | 10 | 20 | 40 | 60 | 80 | 100 |
Reference thrust-speed curves use a 5 V / 18° motor with a 24 VDC constant-current drive. Actual force depends on winding, lead, driver settings, acceleration, screw support and duty cycle.
Mechanical drawings
Fixed-nut and external-drive configurations
Performance reference
Thrust-speed curve
Integration options
Match the actuator to the guided mechanism
Use the fixed-nut version when the supported screw translates through the mechanism, or select the external-drive version when the application supports and guides the moving nut or load interface.
- AD and AB lead selections
- Fixed-nut and external-drive layouts
- Threaded, plain, unmachined or custom screw ends
- Application-specific screw length and interface dimensions
Typical applications
Compact linear motion for precision equipment
SP15PM is intended for guided, space-limited axes that need a simple bipolar stepper interface and selectable travel per step.
Medical and laboratory devices
Compact adjustment, fluid-handling and sample-positioning mechanisms.
Optical equipment
Lens, aperture and alignment mechanisms with guided linear travel.
Portable instruments
Low-mass motion assemblies where package size and simple drive electronics are important.
Automation modules
Small dispensing, locking, selection and mechanical adjustment functions.
Selection guidance
Define the required stroke, load and speed
For configuration support, provide the required stroke, axial load, target speed, duty cycle, installation orientation, supply voltage and screw-end interface.
Frame15 mm
Step angle18°
Lead options0.5 / 1.0 mm
Full-step travel0.025 / 0.05 mm
ConfigurationsFixed-nut / External-drive
Configure SP15PM
Discuss your compact linear-motion requirement
Send the stroke, load, speed, duty cycle and mechanical interface. Spotlight Motor can help match the winding, lead, actuator layout and screw-end machining.
Contact us
Would you like to learn more about our solutions?
We would be happy to advise you—personally, competently, and tailored to your requirements.
Perfection in a new dimension
Further Information
Short delivery times available for selected product configurations.
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