Holding Torque: 0.09 N·mTemp: −60 ~ +85 °C
HK2851A Wide-Temperature Stepper Motor 28 mm (NEMA 11)
HS-grade 28 mm stepper with special low-temperature bearings and weather-resistant magnets.
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Extreme Environment Motion Solutions
Motors that keep moving at −196 °C, 10⁻⁵ Pa, +200 °C
Vacuum-rated and high/low temperature stepper motors, servo motors, drivers and reducers — engineered, tested and customized for the environments where standard motors fail.
−196 ~ +200 °COperating range
10⁻⁵ PaVacuum rating (VHT)
12+ yrsExtreme-motion engineering
1,000+Motors in furnace production
Product Lines
One partner for the whole motion axis
Motors matched with wide-temperature drives, feedback and gearing — qualified together, delivered together.
Drives & Feedback
HD235/HD265 wide-temperature stepper drivers (pulse & RS-485 bus types), HF36 wide-temperature resolvers and HFT resolver decoders…
BrowseReducers & Linear Motion
GP/GZ vacuum planetary gearboxes (frames 42–120, ratios to 200:1, −196 ~ +200 °C, 10⁻⁵ Pa) and…
BrowseServo Motors
HSK series wide-temperature and HSV/HSS stainless-steel high-temperature vacuum AC servo motors, 100–1800 W, 220 VAC with…
BrowseStepper Motors
HK series wide-temperature (−60 ~ +85 °C), HS/HV high-temperature vacuum (−20 ~ +200 °C, to 10⁻⁵…
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Featured Products
Proven in production, not just in the lab
Holding Torque: 0.35 N·mProtection: IP65
HK4248A Wide-Temperature Stepper Motor 42 mm (NEMA 17)
42 mm IP65 stepper with high-precision low-backlash bearings for wide-temperature duty.
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Holding Torque: 1.3 N·mTemp: −60 ~ +85 °C
HK5776A Wide-Temperature Stepper Motor 57 mm (NEMA 23)
57 mm high-torque stepper with professional thermodynamic design for extreme temperature envelopes.
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Holding Torque: 5.5 N·mFrame: 86 mm
HK86118W Wide-Temperature Stepper Motor 86 mm (NEMA 34)
86 mm flagship wide-temperature stepper, the maximum holding torque in the HK series.
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Holding Torque: 0.09 N·mVacuum: to 10⁻⁵ Pa
HS2851A High-Temperature Vacuum Stepper Motor 28 mm (NEMA 11)
Stainless-steel 28 mm stepper for vacuum chambers and thermal environments to +200 °C.
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Holding Torque: 0.15 N·mVacuum: to 10⁻⁵ Pa
HV4249A High-Temperature Vacuum Stepper Motor 42 mm (NEMA 17)
42 mm stainless-body HV series stepper for vacuum furnaces, coating and semiconductor equipment.
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Featured Case Study
1,000+ motors inside silicon crystal growth furnaces
Semiconductor10⁻⁵ Pa · 200 °C
Ultra-Low Temperature Motors Safeguard Automated Biological Sample Storage
SLT-grade cryogenic stepper motors automate storage and retrieval of biological samples at −150 °C and below.
- Failure-free 24/7 operation under 10⁻⁵ Pa vacuum at 200 °C
- Vibration-free rotation for uniform wafer thickness
- From trial to mass production in one co-development program
Why CTRL Motor
Built, tested and certified in-house
52Patents & software copyrights
2,000 m²R&D and production site
ISO + GJB9001:2015 & GJB9001C-2017 certified
−196 °CLiquid-nitrogen verified designs
Custom OEM engineering
Nearly one-year co-development programs are our norm — windings, shafts, flanges, enclosures and connectors tailored to your equipment.
Extreme-environment test lab
Thermal-vacuum characteristic chambers, temperature cycling, salt spray and dynamometers — every design verified before shipment.
1-on-1 engineer support
From raw material selection to solution implementation, a dedicated technical team supports your project end to end.
Applications
Where our motors work
Aerospace & Satellite Communications
Attitude control, antenna mechanisms and satellite equipment that must survive vacuum, radiation and thermal cycling.
View casesBiomedical & Life Science
Cryogenic motors for automated biological sample storage, medical devices and laboratory automation.
View casesDefense Equipment
GJB9001C-certified motion systems for weapon systems and military platforms.
View casesNuclear Industry
Radiation-proof motors with 10⁷ Gy tolerance for nuclear instrumentation and handling equipment.
View casesSemiconductor
Vacuum-rated motors and drives for wafer handling, crystal growth furnaces and process equipment.
View casesTest & Measurement
Motion systems for environmental chambers, vacuum material testing and instrumentation.
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FAQ
Frequently asked questions
Straight answers on torque, vacuum, temperature and control — the parameters that decide whether a motor survives your environment.
Every CTRL Motor product is specified against a standardized environmental grade combining temperature range and vacuum level. Select the grade that covers your worst-case condition — custom grades beyond this table are available on request.
| Category | Code | Temperature Range | Max Casing °C | Vacuum (Pa) |
|---|---|---|---|---|
| Wide Temperature | NTL2 | −40 ~ +85 °C | +115 | — |
| NTL3 | −60 ~ +85 °C | +115 | — | |
| High-Temperature Vacuum | VMT1 | −20 ~ +200 °C | +200 | 10⁻³ |
| VMT2 | −20 ~ +150 °C | +150 | 10⁻³ | |
| VHT1 | −20 ~ +200 °C | +200 | 10⁻⁵ | |
| VHT2 | −20 ~ +160 °C | +160 | 10⁻⁵ | |
| Deep Cryogenic | VTL3 | −60 ~ +100 °C | +130 | 10⁻¹ |
| NTL4 | −80 ~ +85 °C | +115 | — | |
| SLT | −196 ~ +40 °C | +100 | — |
Every product in this catalog is built and inspected against one of these standardized grades. Special requirements — radiation resistance, mold resistance, impact resistance, shaft forms, double shafts, encoders and brakes — are customized on request.
The maximum holding torque of our stepper motors is 5.5 N·m (HK86118W / HS86118W, 86 mm frame), and the maximum rated torque of our servo motors is 5.7 N·m (HSK1118A / HSV1118A, 1800 W). GP/GZ planetary reducers with ratios to 200:1 multiply output torque for high-load axes.
Standard motor grades cover 10⁻¹ / 10⁻³ / 10⁻⁵ Pa (VTL / VMT / VHT). The HF36 resolver is rated for 10⁻⁷ Pa, and custom motor constructions to 10⁻⁷ Pa are available with low-outgassing materials and special vacuum sealing.
Our SLT deep-cryogenic grade is verified at −196 ~ +40 °C using our self-developed low-temperature motor performance test platform. NTL4 covers −80 °C and NTL3 covers −60 °C ambient.
The smallest stepper motor frame is 20 mm (HK2030A / HS2030A, 0.08 kg); the smallest servo motor is the 40 mm 100 W HSK0401A / HSV0401A (0.5 kg).
Stepper motors cover frame sizes 20–86 mm; servo motors span 100 W, 400 W, 750 W, 1000 W and 1800 W at 220 VAC — with 24/48 VDC options on selected models — plus brake and encoder variants.
News & Insights
Engineering notes from the extreme
Nov 9, 2026
Why Vacuum Motors Are Different: Outgassing, Lubrication and Heat
A motor in a vacuum chamber cannot rely on air cooling, ordinary grease or standard plastics. What actually has to…
Read MoreNov 9, 2026
Motor Testing at −196 °C: Inside Our Cryogenic Test Platform
Every SLT-grade deep low-temperature design is verified on our self-developed low-temperature test platform before it ships. A look at the…
Read MoreNov 9, 2026
Stepper Motor vs Servo Motor: How to Choose for Extreme Environments
The fundamental trade-offs — open-loop simplicity versus closed-loop dynamics — look different when the motor must survive −196 °C or…
Read More