From Raw Material to Refined Product — Powered by 20+ Years of Gear Engineering Expertise
In-House development
&production
Customization Projects
Rigorous Tests
In pursuit of the ultimate low noise and light weight, we use special modification design solutions, combined with high-performance polymer materials, to create high-quality products with both light weight and low noise characteristics.
Different from traditional injection molding, based on our 20+ years of gear mold experience, pressure and temperature sensors are installed in each mold cavity to capture parameter changes in each molding cycle in real time, and cooperate with CCD inspection equipment to achieve precise monitoring of every step from raw material molding to finished product output. It ensures the high consistency and stability of the product and provides customers with products of consistent quality.
Our gears break free from conventional manufacturing. Using multi-step precision processes, we meet stringent DIN 5 standards — a level typically reserved for premium automotive components.
Equipped with Klingelnberg gear testers and Zeiss CT scanning systems, we conduct full-spectrum inspections: tooth profile, lead and pitch accuracy, internal bubble detection, impact strength, and fatigue resistance. Every gear undergoes standardized, traceable testing that eliminates defects at the source.
We perform advanced topology optimization on both the stator and rotor. By minimizing cogging torque and reducing back-EMF harmonics, we improve ride smoothness. Rotor geometry is redesigned to increase magnetic flux density, boosting torque density. A segmented stator increases slot fill rate and reduces losses — delivering more power in a smaller footprint.
All rotors undergo 100% dynamic balancing to eliminate vibration. Stators are tested for inter-turn resistance and high-voltage insulation to ensure electrical safety. Our overmolded stator design provides a seamless seal for better cooling and durability — enabling consistent high-power output, even in demanding conditions.
With fully automated Siemens SMT lines, PREETO controls every micrometer. Solder paste is printed with laser-cut stencils for precise volume control. Our linear-motor-driven pick-and-place systems ensure ultra-fast and stable movement for higher accuracy.
We apply dual-stage inspection with SPI, AOI (pre- and post-reflow), and X-ray detection. SPI verifies solder paste thickness; AOI catches misalignment; X-ray scans for hidden solder joint issues — minimizing PCBA defects and ensuring long-term reliability.
Our automated assembly lines are custom-developed for motor applications. Equipped with CCD vision and multiple sensors, they perform 30+ specialized tests — including press-fit accuracy, thermal response, performance verification, noise spectrum analysis, and vacuum air-tightness tests. We’ve built a closed-loop data system that tracks the product journey from raw material to final shipment — ensuring traceability, consistency, and lifetime reliability.
During product design, we use the B&K PULSE acoustic analysis system from Denmark to simulate and optimize vibration and sound propagation paths across the full frequency spectrum. Detailed modal analysis allows us to suppress resonance at the source — achieving best-in-class low-noise performance.
With 20+ years of gear development behind us, we’ve established an extensive fatigue and impact testing database.
We apply automotive-grade validation protocols to critical components like gears, clutches, splined shafts, and spindles — ensuring stable performance in extreme conditions: heat, cold, vibration, and humidity.
Each product undergoes over 200 different tests — from individual parts like motors and PCBA to complete assemblies. We run 5,000+ hour durability testing, simulating real-world stresses to verify long-term performance and safety.
To deliver ultra-silent and lightweight e-bike mid-drive motors, we employ specialized gear profile modification design and high-performance polymer materials. Additionally, we install pressure and temperature sensors into every cavity, which is significantly different from conventional injection molding. This process allows us to capture real-time data changes within each molding cycle and integrates with CCD inspection for full-process precision monitoring—from raw material molding to final product output.
Our gears break free from conventional manufacturing. Using multi-step precision processes, we meet stringent DIN 5 standards — a level typically reserved for premium automotive components.
Equipped with Klingelnberg gear testers and Zeiss CT scanning systems, we conduct full-spectrum inspections: tooth profile, lead and pitch accuracy, internal bubble detection, impact strength, and fatigue resistance. Every gear undergoes standardized, traceable testing that eliminates defects at the source.
We perform advanced topology optimization on both the stator and rotor. By minimizing cogging torque and reducing back-EMF harmonics, we improve ride smoothness. Rotor geometry is redesigned to increase magnetic flux density, boosting torque density. A segmented stator increases slot fill rate and reduces losses — delivering more power in a smaller footprint.
All rotors undergo 100% dynamic balancing to eliminate vibration. Stators are tested for inter-turn resistance and high-voltage insulation to ensure electrical safety. Our overmolded stator design provides a seamless seal for better cooling and durability — enabling consistent high-power output, even in demanding conditions.
With fully automated Siemens SMT lines, PREETO controls every micrometer. Solder paste is printed with laser-cut stencils for precise volume control. Our linear-motor-driven pick-and-place systems ensure ultra-fast and stable movement for higher accuracy.
We apply dual-stage inspection with SPI, AOI (pre- and post-reflow), and X-ray detection. SPI verifies solder paste thickness; AOI catches misalignment; X-ray scans for hidden solder joint issues — minimizing PCBA defects and ensuring long-term reliability.
Our automated assembly lines are custom-developed for motor applications. Equipped with CCD vision and multiple sensors, they perform 30+ specialized tests — including press-fit accuracy, thermal response, performance verification, noise spectrum analysis, and vacuum air-tightness tests. We’ve built a closed-loop data system that tracks the product journey from raw material to final shipment — ensuring traceability, consistency, and lifetime reliability.
During product design, we use the B&K PULSE acoustic analysis system from Denmark to simulate and optimize vibration and sound propagation paths across the full frequency spectrum. Detailed modal analysis allows us to suppress resonance at the source — achieving best-in-class low-noise performance.
With 20+ years of gear development behind us, we’ve established an extensive fatigue and impact testing database.
We apply automotive-grade validation protocols to critical components like gears, clutches, splined shafts, and spindles — ensuring stable performance in extreme conditions: heat, cold, vibration, and humidity.
Each product undergoes over 200 different tests — from individual parts like motors and PCBA to complete assemblies. We run 5,000+ hour durability testing, simulating real-world stresses to verify long-term performance and safety.
PREETO is committed to building a closed-loop ecosystem from material to finished motor — powered by precision, performance, and an obsession with quality. Through every innovation, we aim to deliver an e-bike experience that’s smoother, stronger, and smarter.
