The PT magnetic drive gear is a magnetic assembly designed for non-contact power transmission. Its magnetic poles are oriented perpendicular to the base, allowing for parallel torque transmission. Since it transmits power without generating dust, it is primarily used in the electronics industry for product conveyance and similar applications.
The gear consists of a multi-pole magnetic ring, an aluminum support frame, and, in some models, a reinforcing iron ring (though not all specifications require the iron ring). The magnetic ring and iron ring are typically plated with nickel-copper-nickel, while the aluminum frame undergoes anodization for surface protection.
Magnetic Gears
Industrial Application of PT Magnetic Drive Gears
The PT-series magnetic drive gears serve as the core transmission component in turntable-type multi-station CNC machining centers, offering precise non-contact torque transfer for high-speed indexing and workpiece positioning. This technology has become indispensable in automated production lines requiring micron-level repeatability.
Structure of PT Magnetic Drive Gear
The PT magnetic drive gear is typically protected by a coating or anodization, which prevents surface oxidation and corrosion under normal operating conditions. However, as electronic products continue to evolve, the PT magnetic drive gear is being used in more diverse environments, including those with water, acidic or alkaline gases, and liquids. In such environments, traditional PT magnetic drive gears may eventually rust or corrode over time, compromising their performance.
To address this issue, we now encapsulate the magnetic ring in stainless steel (with a thickness ranging from 0.1mm to 3mm to avoid affecting magnetic strength). The central support is also made of the same stainless steel material. After encapsulating the magnetic ring and the reinforcing iron ring (in some cases, only the magnetic ring is encapsulated), the seams are welded and sealed, followed by polishing to ensure a smooth and finished appearance.
This design effectively isolates the magnetic ring and reinforcing iron ring from external environments, providing superior protection against oxidation and corrosion. Traditional PT magnetic drive gears, which rely on nickel-plated surfaces, are unsuitable for use in humid, acidic, or alkaline environments. In contrast, the stainless steel-encapsulated PT magnetic drive gear can withstand such conditions because the stainless steel itself is resistant to these environments, and the magnetic ring is fully encapsulated, never exposed to external elements. As a result, this product can operate reliably in humid, acidic, or alkaline environments without risk of corrosion.
Operating Principle
PT-series magnetic gears feature vertically oriented magnetic poles perpendicular to the gear baseplate. When two PT gears are engaged, their perpendicular pole alignment induces automatic parallel orientation through magnetic field interactions. This self-aligning mechanism eliminates mechanical backlash while maintaining consistent air gap distances (typically 0.5-1.2mm). Widely adopted across Asian manufacturing sectors, this contactless transmission technology has evolved into a proven industrial solution for contamination-sensitive environments.
Performance Tiers
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Material Differentiation
- Stainless Steel Encapsulated Units: Full stainless steel housing provides IP69K-rated corrosion resistance, making them ideal for chemical processing and food-grade applications where hygiene standards prohibit lubricant use.
- Aluminum Alloy Units: Lightweight (35% mass reduction vs. steel) and cost-effective, these variants dominate general industrial applications requiring ≥200Nm torque transmission.
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Pole Configuration
Standard models employ optimized 10-pole arrays to balance torque stability (±2% fluctuation) and operational smoothness. High-pole variants (12-16 poles) enhance motion uniformity by 18-22% at the expense of maximum torque capacity (15% reduction per additional pole pair).
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- Enhanced Edition: Incorporates a proprietary ferromagnetic reflector ring to amplify surface magnetic flux density by 40%, achieving 650mT residual induction for demanding high-inertia loads.
- Standard Edition: Utilizes direct pole-to-air coupling configuration suitable for 85% of industrial scenarios with ≤500Nm operational torque.
Technical Advisory
For customized technical inquiries regarding pole configuration optimization, material selection matrices, or ISO 14691-1 compliance verification, please utilize the comment section below or contact our engineering team directly. Comprehensive CAD models and FEA simulation reports are available upon formal request.
Note: All torque values calculated at 25°C ambient temperature with 1mm air gap. Performance metrics may vary under extreme operating conditions.