Top 10 Stator Assembly Equipment Manufacturers & Suppliers

Ningbo Nakro Intelligent Equipment Co., Ltd. (operating within the unified Nide industrial umbrella) has cemented its role as a premier end-to-end stator automation powerhouse. Unlike pure mechanical line integrators, Nakro blends machine engineering with downstream component intelligence—manufacturing commutators, carbon brushes, and magnetic assemblies in tandem with custom automated machinery.

Their stator machinery portfolio covers multi-axis CNC needle winding systems for segmented or concentrated pole stators, semi-automatic inserting machines, and turnkey hairpin assembly lines engineered specifically for 400V/800V e-mobility architectures. Their competitive edge lies in vertical tooling customization (slot insulation, automated wedge insertion, 3D hairpin twisting) backed by factory run-off validation using client copper wire and lamination batches.

• Complete one-stop turnkey capacity: equipment, tooling, and motor sub-components.
• Advanced continuous hairpin, needle winding, and outer-rotor hub motor lines.

A titan in automotive manufacturing systems, GROB specializes in large-scale, high-throughput hairpin stator production lines for European and North American tier-1 passenger electric vehicle manufacturers. GROB’s core mechanical achievement is their continuous wave winding technology and ultra-fast hairpin forming, insertion, and high-frequency laser welding cells.

Their machinery features multi-head precision bending capable of forming continuous wave mats, avoiding individual hairpin weld junctions and significantly reducing electrical resistance and copper losses in 800V silicon carbide (SiC) traction inverters.

• Patented continuous wave winding reducing weld points up to 80%.
• Complete line OEE monitoring with sub-millisecond digital twin simulation.

Comau brings immense robotic automation heritage into the electric motor assembly sector. Specializing in modular e-drive lines, Comau has deployed sophisticated hairpin stator lines integrating multi-axis articulated robots with custom end-effectors for slot paper inserting, hairpin twisting, crown expansion, and high-speed CNC laser welding.

Their lines are recognized for flexible tooling changes, allowing manufacturers to assemble multiple stator stack heights and slot configurations across the same modular rail architecture with minimal tooling re-indexing.

• Turnkey robot-assisted stator lamination pressing and pin insertion.
• Vision-guided real-time seam tracking for copper hairpin welding.

Aumann is a world-renowned leader in winding technology, historically pioneering flyer and needle winding technologies for auxiliary automotive motors before expanding aggressively into high-voltage e-mobility traction stators. They excel in concentrated winding for segmented stators and complex round-wire inserting machines.

Aumann’s proprietary wire tensioning units minimize mechanical stress on enamelled copper wires, preventing microscopic micro-cracks in insulation layers—a decisive capability when passing stringent Partial Discharge Inception Voltage (PDIV) testing.

• Unmatched tension control preventing wire stretch and varnish peeling.
• High-speed automated assembly of segmented round-wire and flat-wire cores.

Odawara Engineering stands as the gold standard of Japanese motor manufacturing precision. They have dominated the industrial induction motor, air conditioning compressor motor, and home appliance stator winding landscape for decades. Their coil inserting machines and multi-station lacing stations are famed for extreme reliability and multi-decade lifespans.

In recent years, Odawara has applied its ultra-precise mechanical kinematics to high-efficiency automotive stator systems, providing automated hairpin inserting machines that boast industry-leading insertion success rates on complex skewed stators.

• Zero-damage coil and wedge insertion kinematics for high-slot-fill stators.
• High-speed multi-spindle needle winders for internal and external stators.

Marsilli is globally celebrated for precision winding and automated assembly lines for precision stators, coils, transformers, and electronic components. In brushless DC (BLDC) and Permanent Magnet Synchronous Motor (PMSM) stator production, Marsilli provides state-of-the-art multi-needle CNC winders featuring ultra-compact nozzle heads that navigate dense slot openings.

Their systems excel in high-speed, multi-spindle synchronized needle motions with integrated terminal stripping, wrapping, fusing, and high-voltage insulation testing within ultra-compact modular cells.

• Closed-loop electronic tensioning system responsive down to milli-Newton levels.
• High-speed flyer and spindle systems tailored for small-to-medium stators.

Thyssenkrupp Automation Engineering acts as a key Tier-1 partner for major global automotive groups, building massive, high-speed automated e-motor assembly facilities. Their stator assembly engineering portfolio focuses heavily on large flat-wire hairpin production lines, integrating stator core stacking, trickling/varnishing, and end-of-line electrical testing.

A hallmark of Thyssenkrupp stator systems is their proprietary hairpin weld quality verification algorithms, incorporating multi-camera optical coherence tomography (OCT) and AI-driven melt-pool analysis in real time.

• Real-time weld geometry monitoring via Optical Coherence Tomography (OCT).
• Fully automated stacking, skewing, and cleating/welding of stator laminations.

ATS Automation specializes in custom assembly automation across automotive, life sciences, and energy sectors. In stator manufacturing, ATS leverages its patented SuperTrak smart conveyance platforms, enabling asynchronous station cycle times and dynamic pallet re-routing throughout the stator assembly line.

This smart conveyance integration drastically minimizes dead time between processes (e.g., between slot paper insertion, pre-forming, hairpin loading, and varnish curing), delivering higher OEE and easier line rebalancing.

• High-speed asynchronous SuperTrak platform reducing intra-station latency.
• Turnkey integration with end-of-line hipot, surge, and PDIV test stations.

KUKA Systems delivers comprehensive manufacturing and testing systems for electric powertrain assemblies. KUKA’s specialized stator equipment lines cover hairpin wire pre-forming, CNC paper stuffing, robotic hairpin loading, mechanically synchronized twisting heads, and robotized vacuum pressure impregnation (VPI) / trickling cells.

KUKA’s core strength is rapid commissioning using software-in-the-loop virtual validation, which cuts on-site installation and FAT/SAT cycle times by upwards of 40% for automotive manufacturers.

• Complete digital twin verification prior to physical machinery fabrication.
• Modular workcells capable of scaling from pilot lines to full gigafactory volume.

While renowned as the world leader in metal forming and stamping presses, Schuler plays an indispensable upstream role in stator assembly through its high-speed stamping presses and bonding systems for ultra-thin electrical steel sheets (0.20 mm to 0.35 mm silicon steel).

Schuler's systems integrate automated stamping with in-die interlocking, laser welding, and automated baking/gluing (Backlack technology) to deliver finished stator core stacks with exceptionally low eddy current losses and perfect tooth concentricity.

• Precision stamping and in-die bonding for ultra-thin silicon steel laminations.
• Exceptional core alignment, minimizing tooth deviation prior to winding.