Stepper Motor Stator and Rotor
- We specialize in custom stepper motor stator and rotor manufacturing, tailored to meet your specific design, size, and performance requirements.
- From prototype to mass production, our precision-engineered cores ensure high torque, smooth motion, and efficiency, suited for industries requiring accuracy and reliability.
- Stator Outer Diameter: 10 mm – 200 mm
- Rotor Outer Diameter: 10 mm – 180 mm
- Compatible with All Stepper Motor Types
- Flexible Minimum Order Quantities (MOQ)
- OEM & ODM Services Available
How the Stator and Rotor Work Together in an Stepper Motor?
- In a stepper motor, the stator and rotor move in steps to turn electrical pulses into precise motion.
- The stator has laminated cores with many teeth, each with coil windings. When powered in order, these coils create shifting magnetic poles that form a rotating magnetic field around the rotor.
- The rotor is often composed of laminated steel and may contain soft iron teeth or permanent magnets. It moves step-by-step as it aligns with the stator’s magnetic field.
- Each pulse turns the rotor by a set angle. The close coordination between stator and rotor ensures accurate and repeatable movement. Good lamination, tooth shape, and a small air gap help improve accuracy, reduce vibration, and lower torque ripple.
Stepper Motor Stator and Rotor Specifications
Below are standard specifications for our stepper motor stator and rotor components. We offer full customization based on your design drawings and technical requirements.
| Parameter | Stator | Rotor |
| Outer Diameter | 20 mm – 200 mm | 15 mm – 180 mm |
| Stack Height | 5 mm – 100 mm | 5 mm – 100 mm |
| Lamination Thickness | 0.2 mm / 0.35 mm | 0.2 mm / 0.35 mm |
| Material | Non-oriented Silicon Steel | High-permeability Steel / Magnetic Alloy |
| Slot Type | Open / Semi-closed / Tooth-slot | Multi-tooth / Helical teeth |
| Number of Phases Supported | 2-phase / 3-phase / 5-phase | N/A |
| Insulation Class | Class B / F | N/A |
| Skewing | Optional | Available for torque smoothness |
| Surface Treatment | Anti-rust Coating / Epoxy Insulation | Dynamic Balancing / Surface Coating |
| Tolerance (OD/ID/Gap) | ±0.03 mm | Air Gap Tolerance ≤ 0.2 mm |
Stepper Motor Types We Support
We supply stator and rotor sets compatible with various stepper motor technologies, each precisely engineered for optimal magnetic performance.
Permanent Magnet (PM) Stepper Motor
- Stators feature simple laminated cores with salient poles; rotors use permanent magnets for fixed polarity and stable detent torque.
Variable Reluctance (VR) Stepper Motor
- Stators have multiple soft iron poles; rotors are toothed and non-magnetic, enabling precise positioning through varying magnetic reluctance.
Hybrid Stepper Motor
- Combines toothed stator poles and a permanent magnet rotor; offers improved torque and resolution for high-precision positioning applications.
Gear Stepper Motor
- Customized stator-rotor sets designed to integrate with gearboxes, optimizing torque transfer and minimizing backlash in space-limited applications.
Linear Stepper Motor
- Stators and moving magnetic forcers engineered for linear translation; lamination stacks designed for smooth motion and accurate displacement control.
Custom Stepper Motor Types
- We provide tailored stator and rotor solutions based on your drawings, specifications, and performance needs for unique stepper motor applications.
Customer Case
A robotics company in Seoul, South Korea, required a compact, high-resolution stator and rotor set for hybrid stepper motors used in robotic joints.
Customer Requirements
- Stator OD: 48 mm, Stack Height: 32 mm
- Rotor with helical teeth for reduced torque ripple
- Lamination thickness ≤ 0.2 mm
- Air gap tolerance: ≤ 0.02 mm
- Dynamic balancing and Class F insulation
Our Solution
- Produced a 48 mm stator using 0.2 mm silicon steel laminations with epoxy insulation.
- Rotor featured precision-machined helical teeth and was dynamically balanced to ISO G1.0 standard.
- Achieved air gap tolerance of 0.018 mm.
- Full QC inspection ensured stack height uniformity and rotor smoothness
Results
| Parameter | Required | Delivered |
| Stator Outer Diameter | 48 mm | 47.98 mm |
| Air Gap Tolerance | ≤ 0.02 mm | 0.018 mm |
| Rotor Tooth Profile | Helical | Helical (±0.1° precision) |
| Stack Height Uniformity | ±0.05 mm | ±0.03 mm |
| Vibration Level | ISO G1.0 | ISO G1.0 compliant |
