Vacuum-oriented design
Supports equipment that requires clean materials and controlled environments.
20/28 mm Vacuum Stepper Motor
Vacuum Stepper Motor (10⁻⁷ Pa)
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
Original model-specific ratings, dimensions, curves and connection information are preserved below for engineering review.
Engineering data
Technical Specifications 1
| Specification | Value |
|---|---|
| ? | Company symbol |
| ② | Frame sizefmm]:20、28、35、42、57、60、86 |
| ? | Hybrid Screw Type: C: Type C fixed shaft type; K: Type K fixed shaft type; N: Through shaft type; E: External drive type; |
| None: Regular style | |
| ④ | Step angle(°): 2: 1.8; 4: 0.9 |
| 5 | Fuselage length(mm):32、38、42、48、51、55、76、80、118… |
| ? | Rated current: 0 5: 0.5A; 10: 1.0A; 20: 2.0A; 30: 3.0A; 40: 4.0A; 50: 5.0A; 60: 6.0A |
| Screw Type: 4T: Long screw; 2T: Diagonal diagonal screw; None: Default conventional | |
| controller: BK: with brake; None; Outgoing shaft type: SZ: Double output shaft; Ts: Thermocouple | |
| 9 | Type of screw rod: B: Ball screw; Tr: Trapezoidal screw rod |
| Other information of screw rod: 06: Screw rod diameter; 01: Lead; xx: Screw rod length/Effective stroke | |
| Vacuum environment(Pa): Low vacuum (LV) : 102~10-1; High vacuum (HV): 10-1-10-5; Ultra high vacuum (UHV): < 10-5; | |
| 10 | Radiation dosage (Gry): Low radiation LRA: Less than 10; High radiation (HRA): 10310F; Ultra high radiation {URA):106; |
| Clean motor: JJ | |
| 11 | Lxx-Hxx: Low (L)-High (H) temperature customization; xx: Specific temperature |
| 12 | Outgoing line length at motor end: None: Default outgoing line; M scattered line; 5M: Outgoing line at motor end 5m; 1: |
| Scattered line; 2: Cable line |
Engineering data
General Specifications
| StepAngle | 1.8° | InsulationClass | Grade B |
|---|---|---|---|
| RadialClearance | 0.025mm(Load 450g) | DielectricStrength | 500VAC 50HZ 1mA 1Minute |
| AxialClearance | 0.075mm(Load 920g) | MotorTemperaturerise | 80°C Max(Rated current and normal voltage) |
| ResistanceAccuracy | ±5% | AmbientTemperature | Optional grade |
| Series 20/28/35 / 10N Max(Distance to flange face20mm) | |||
| AccuracyOfInductance | ±10% | Radial Load | |
| Series 42 / 22N Max(Distance to flange face20mm) | |||
| Series 20 / 2N Max | |||
| InsulationResistance | 100MΩ | Axial Loading | Series 28/35 / 5N Max |
| Series 42 / 10N Max |
Engineering data
Model Specifications
| Modeland | Step | Fuselagelength | Rated | Phase | Phase | Holding | Momentof | Weight | Adaptivedriveunit |
|---|---|---|---|---|---|---|---|---|---|
| specification | angle (°) | Imax(mm) | current(A) | resistance (Q) | inductance(mH) | torque(N·m) | inertia（g·cm2) | (kg) | (Recommended) |
| YC20242** | 1.8 | 42[0ptional 30] | 0.5 | 11.8 | 5.5 | 0.036 | 2.7 | 0.06 | DM422S |
| YC28251** | 1.8 | 51[0ptional 33} | 0.5 | 11 | 11 | 0.14 | 18 | 0.2 | 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.
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