22 mm hollow bore
The through bore provides a clear central passage within the 50 mm motor frame.
SPHYC5022222-12-H-01 50 mm Large-Bore Hollow Shaft Stepper Motor
Large-Bore Hollow Shaft Stepper Motor
The SPHYC5022222-12-H-01 is a 50 mm two-phase hollow shaft stepper motor with a 22 mm through bore, 1.8° step angle and 0.11 N·m holding torque.
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
SPHYC5022222-12-H-01 hollow shaft stepper motor
A clear center passage in a compact 50 mm frame
The SPHYC5022222-12-H-01 combines a 22 mm hollow bore with a 50 mm square frame, 1.8° step angle and 0.11 N·m holding torque for compact through-axis motion assemblies.
0.11 N·m holding torque
The two-phase motor provides verified holding torque for compact positioning and rotary holding duties.
Controlled shaft play
Maximum radial play is 0.025 mm under a 450 g load; maximum axial play is 0.075 mm under a 920 g load.
Engineering information
Technical data
50 mmFrame size
22 mmHollow bore diameter
0.11 N·mHolding torque
1.8°Basic step angle
Motor specification
Electrical, mechanical and environmental parameters
| Parameter | Value |
|---|---|
| Number of phases | 2 |
| Basic step angle | 1.8° |
| Positional accuracy, no load | ±0.09° max. |
| Rated voltage, per phase | 1.92 V |
| Rated current, per phase | 1.2 A |
| Phase resistance at 20°C | 1.6 Ω ±10% |
| Phase inductance at 1 kHz | 1.4 mH ±20% |
| Holding torque | 0.11 N·m |
| Mass | 0.3 kg |
| Radial play, maximum | 0.025 mm under 450 g load |
| Axial play, maximum | 0.075 mm under 920 g load |
| Duty | Continuous |
| Dielectric strength | 500 V DC |
| Insulation resistance | 100 MΩ (500 VDC) |
| Insulation class (UL) | B |
| Temperature rise | 80°C |
| Life | 5,000 hours minimum |
| Operating ambient temperature | 0°C to +50°C |
| Operating ambient humidity | 20% RH to 90% RH |
| Storage ambient temperature | −20°C to +70°C |
| Storage ambient humidity | 15% RH to 95% RH |
Connection data
Lead-wire assignment
| Lead color | Phase terminal |
|---|---|
| Red | A |
| Green | Ā |
| Orange | B |
| Blue | B̄ |
Two-phase excitation
Excitation sequence
| Step | A | B | Ā | B̄ |
|---|---|---|---|---|
| 1 | + | + | − | − |
| 2 | − | + | + | − |
| 3 | − | − | + | + |
| 4 | + | − | − | + |
| 5 | + | + | − | − |
Large-bore motor architecture
Compact motion around a 22 mm center bore
The SPHYC5022222-12-H-01 package combines a square 50 mm mounting envelope with a large hollow center for machinery layouts that require a passage through the motor axis.
- 50 × 50 mm front mounting envelope
- 22 mm hollow bore diameter
- Continuous-duty two-phase stepper motor
Application fields
For compact mechanisms that require a through-axis passage
The large hollow bore supports mechanical layouts where routing or a central rotating element must pass through the motor axis.
Rotary indexing
Compact indexing mechanisms with a central passage requirement.
Cable routing axes
Motion assemblies that route cables or tubing through the rotation center.
Inspection equipment
Positioning modules for optical, measurement and inspection systems.
Automation modules
Space-conscious rotary modules in customized automation equipment.
System integration
Verified data for mechanical and electrical planning
Use the dimensional drawing and operating values to evaluate mounting, load conditions, wiring and ambient requirements.
Frame size50 × 50 mm
Hollow bore22 mm
Rated phase current1.2 A
DutyContinuous
Operating ambient0°C to +50°C
Discuss your large-bore motion requirement with our engineers.
Share the required bore, torque, load, speed, mounting and environmental conditions for product 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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