Vacuum-oriented design
Supports equipment that requires clean materials and controlled environments.
20/28 mm Vacuum Stepper Motor
Vacuum Two-Phase Stepper Motor
Vacuum-compatible motor designed for precise motion, repeatable positioning and integration into demanding vacuum equipment.
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
Precision motion for vacuum equipment
Reliable controlled motion in demanding vacuum environments
A dedicated motor platform for accurate positioning and dependable operation inside advanced vacuum systems.
Precise motion
Enables repeatable positioning for demanding machine axes.
Integration flexibility
Original rated data supports mechanical and electrical planning.
Engineering information
Technical data
Electrical, mechanical and load specifications for the 20 mm and 28 mm vacuum stepper motor variants.
Engineering data
General Specifications
| Specification | Value | Specification | Value |
|---|---|---|---|
| Step angle | 1.8° | Insulation class | Class B |
| Radial clearance | 0.025 mm (450 g load) | Dielectric strength | 500 VAC, 50 Hz, 1 mA, 1 minute |
| Axial clearance | 0.075 mm (920 g load) | Motor temperature rise | 80°C max. (rated current, atmospheric pressure) |
| Resistance accuracy | ±5% | Ambient temperature | Temperature class selectable |
| Inductance accuracy | ±10% | Radial load | 10 N max. for 20/28 series (at 20 mm from flange face) |
| Insulation resistance | 100 MΩ | Axial load | 20 series: 2 N max.; 28 series: 5 N max. |
Engineering data
Model Specifications
| Model | Step angle (°) | Body length Lmax (mm) | Rated current (A) | Phase resistance (Ω) | Phase inductance (mH) | Holding torque (N·m) | Rotor inertia (g·cm²) | Weight (kg) | Recommended driver |
|---|---|---|---|---|---|---|---|---|---|
| YC20242** | 1.8 | 42 (optional 28) | 0.5 | 11.8 | 5.5 | 0.036 | 2.7 | 0.1 | DM422S |
| YC28251** | 1.8 | 51 (optional 33) | 0.5 | 11 | 11 | 0.14 | 18 | 0.24 | DM422S |
Always confirm the final operating point and installation conditions with Spotlight Motor engineering support.
System integration
Plan the complete vacuum motion axis with confidence
Confirm vacuum level, load profile, cabling, controller interface and thermal conditions during system design.
- Validate target vacuum level and materials
- Match torque and speed to the duty cycle
- Plan cabling and feedthrough interfaces
Application fields
Designed for demanding vacuum automation
A practical fit where vacuum compatibility and precise motion are both essential.
Semiconductor tools
Transfer, alignment and process-support motion.
Vacuum coating
Positioning axes for deposition equipment.
Laboratory systems
Research chambers and analytical instruments.
Precision stages
Rotary and linear positioning assemblies.
Discuss your Vacuum Stepper Motor-20 and 28 requirement with our engineers.
Share your load, speed, duty cycle, controller and installation requirements for model selection and integration support.
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.
The TP+ HIGH TORQUE enables maximum torque density and maximum torsional rigidity—ideal for demanding applications with dynamic load changes and high positioning accuracy.
alpha Advanced Line gearboxes with increased durability and food-grade lubrication available.
The TP+ for coordinated pinion-rack systems for medium to high requirements. Typical areas of application in wood, plastic, and composite processing, in machining centers, or in automation.
With cynapse® and smart services, you can unleash the full potential of your drive system: sensor data is processed, visualized, and analyzed intelligently. Find out how the combination of gearboxes with cynapse® and our Smart Services can make your digital production faster, safer, and more efficient.
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