Engineered for food service machinery, hearth products, and localized HVAC control units operating in humid marine climates.
Built with high-temperature insulation class H to withstand intensive baking processes in commercial bakeries.
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Delivers precise rotation rates vital for specialty coffee drum turning and custom culinary mixers.
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Corrosion-resistant casing design specifically geared for humid environments in ice makers.
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Multi-frequency motor with dynamic gear ratios, ideal for commercial duct valves and air handlers.
Request Spec SheetIn the Pacific Northwest's thriving commercial and industrial sector, demand for reliable, cost-efficient, and long-lasting mechanical movement has driven the adoption of advanced AC Shaded Pole Gear Motors.
Whether in commercial ventilation dampers regulating damp coastal air, high-duty heating pellet stoves heating homes in Puget Sound, or commercial kitchen appliances driving local restaurant infrastructure, these motors serve as the unheralded workhorses. Shaded pole motors offer a distinct advantage: simplicity of design, absolute starting reliability under low voltage conditions, and tolerance to stall-related thermal overloads.
At Quark Motion, we combine twenty years of micro-drive innovation with deep localized expertise to deliver products certified for the North American market, conforming directly to UL, CSA, and CE requirements.
Aligning raw mechanical output with modern automation demands and local environmental regulations.
Our motors are natively engineered for 60Hz grids, maintaining stable magnetic flux and reducing heating.
Protected against condensation and moisture intrusion prevalent in the Puget Sound climate zone.
Continuous operational durability reducing replacement intervals for localized automated systems.
Washington State has instituted some of the country’s most stringent energy conservation laws, notably the Washington Clean Buildings Performance Standard. Every component integrated into commercial building infrastructures, from variable air volume (VAV) dampers to automated exhaust systems, must meet precise energy footprints. Quark Motion's AC Shaded Pole Geared Motors leverage high-grade electrical steel laminations and tight copper windings to reduce parasitic eddy current losses, aiding OEMs in staying compliant with statewide eco-efficiency policies.
Explore our advanced production lines, testing laboratories, and raw material processing stations.
Welcome to Quark Motion, where the physics of advanced rotation meets world-class manufacturing efficiency. As a premier, ISO9001-certified factory, we specialize in the R&D, custom engineering, and mass production of high-performance AC Shaded Pole Gear Motors, DC Gear Motors, and Brushless DC Motors (BLDC).
For over twenty years, Quark Motion has been the silent power behind the world's smartest devices. From high-end medical pumps and automotive electronics to smart home automation and precision robotics, our micro-drives are chosen by global OEM buyers for their exceptional power-to-size ratio, whisper-quiet acoustics, and enduring operational lifespans. We control the entire lifecycle of production, utilizing automated assembly and strict 100% in-house quality inspection to guarantee that every unit leaves our facility performing flawlessly.




























Every Shaded Pole Gear Motor is verified under extreme stresses to confirm it stands up to our standards and those of the Pacific Northwest.
Using our specialized design modules and metrology rooms, we conduct rigorous verification testing on core features: starting torque limits, gear reduction backlash, material hardness, noise level compliance in residential areas, and durability against salt fog and corrosion in near-coast application zones.
We understand that true B2B success lies in flexibility. That is why Quark Motion thrives on 100% custom-engineered solutions. Backed by an elite technical team holding multiple industry patents, we provide rapid prototyping and factory-direct technical support. Whether you require specific voltage tuning, custom shaft modifications, or bespoke gear ratios, we engineer the robust drive that keeps your business moving forward.

















Specialized physical configurations engineered for precise torque transmission and durability.
Built with integrated speed tachometers to deliver smooth speed adjustments under heavy weight loads.
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Designed with high thermal safety limits, optimal for heavy feeding augers in residential stoves.
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Corrosion-proof shaft treatments ensure survival in marine engine bays and saltwater environments.
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Combines low-RPM rotisserie rotation with secondary stator-cooling fans to ensure operation under high heat.
Request Spec SheetA shaded-pole motor is a type of self-starting AC single-phase induction motor, utilizing auxiliary copper shading rings to create a rotating magnetic field.
During operation, the main stator winding receives the alternating current, creating an initial pulsating magnetic field. The short-circuited copper strap (the shading coil) delays the buildup of magnetic flux in that specific portion of the pole. The phase delay creates a weak shifting magnetic field across the pole face, generating enough starting torque to spin the squirrel-cage rotor.
Gear Reduction Advantage: Because shaded pole motors natively run at relatively high speeds (usually 2800-3200 RPM at 60Hz) with very low starting torque, the integration of a multi-stage gearbox is crucial. Our gearboxes utilize hardened steel spur gears and precision hobbed gears to step down the rotation rate to as low as 1.5 RPM, converting raw angular speed into substantial torque (up to 150 kg.cm).
| Parameter | Shaded Pole Motor | PSC Motor |
|---|---|---|
| Initial Cost | Extremely Economical | Moderate to High |
| Design Simplicity | No capacitors or switches | Requires external run capacitor |
| Stall Durability | High tolerance (Impedance protected) | Low tolerance (Prone to winding burnout) |
| Maintenance | Virtually Maintenance-Free | Capacitors degrade over time |
Developing next-generation micro-drives to meet future regulatory and industrial requirements.
Integrating fluorosilicone-based long-term lubricants designed to operate smoothly from -40°C to +150°C without viscosity breakdown, targeting commercial freezer applications.
Adopting powder metallurgy gear configurations infused with self-lubricating graphite, boosting torque limits while maintaining silent operations.
Using simulated CAD mapping to wind coils with optimized slot-fill ratios, resulting in lower resistance losses and improved efficiency.
Complete single-phase AC solutions. Match your mechanical space envelopes with our reliable, high-torque configurations.
Built with high-precision double-shielded ball bearings for extended operations.
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Features smooth dial adjustment, ideal for dough rollers, marinators, and food mixers.
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Built with high-torque gearsets to prevent jamming from wood dust and debris.
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Highly reliable gear reduction design, optimized for quiet domestic heating systems.
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High-torque output (150kg.cm) designed to rotate heavy air filters in HVAC purification units.
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Includes integrated drive control cards for precise position feedback and automated setups.
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Built to handle up to 22N.m of torque, perfect for commercial smoking cabinets and rotisseries.
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Customized output shafts and mounting flanges made to drop into existing production systems.
Request QuoteOur engineering team can customize shaft diameters, gear ratios, mounting holes, and wire lead terminations to match your exact spatial and load requirements.
Start Your Custom Design ProjectClear answers to technical inquiries from design engineers, procurement professionals, and distributors.
Shaded pole motors are highly economical and durable due to their simple design without start switches or capacitors. When paired with high-quality gearboxes, they easily convert rotational speeds into high starting torque, making them ideal for pellet feeds, dampers, and rotisseries.
Yes, our motors are engineered to meet UL (Underwriters Laboratories) and CSA standards. They feature built-in impedance protection and auto-reset thermal cutoffs, meeting fire and electrical safety regulations in Washington State and the broader North American market.
Running a motor built for 50Hz on a 60Hz supply can cause overheating and poor efficiency. Our motors are custom-built for 60Hz operation in North America, ensuring stable magnetic flux, optimal gear speeds, and cooler runs.
We offer wide customization options, including custom shaft profiles (flat, spline, hollow), specialized gear ratios for precise RPMs, lead wire terminations, high-temp class H insulation, and dual-direction options.
We apply corrosion-resistant platings to our gears, use sealed dust caps, and apply moisture-resistant insulation coatings to the stator windings. We verify this performance using salt spray chamber testing to ensure durability in marine and coastal climates.
Sleeve bearings are quiet and cost-effective for light loads, while double ball bearings handle radial and axial forces better, extending the motor's lifespan up to 25,000 hours in continuous duty applications.
Prototype samples are finished within 7-10 days, while bulk production runs take 25-30 days. Sea shipping directly to the Port of Seattle takes approximately 18-22 days, and express air options are available for urgent needs.