Precision Magnet Manufacturing Since 1994
Custom Magnetic Solutions
From Prototype to Production
At Mainrich International, we don't just engineer custom magnetic solutions to your every need. We also engineer supply chain safety.
500+
Projects Delivered
30+
Years Experience
45+
Countries Served
Trusted by Industry Leaders Worldwide
Precision Motor Magnets
The Critical Link in AI Robotics
Humanoid robots and AI-powered actuators demand magnets with sine-wave flux output and micron-level precision.
Our radial multipole rings deliver surface-focused flux concentration in a single piece—no assembly gaps, no flux leakage, just smooth torque. Engineered for the tolerances robotics OEMs actually need.
+20–30%
Surface Flux vs Tiles
<1% variance
Flux Consistency
Sinusoidal
Waveform Output
4 / 6 / 8+
Pole Configurations
The 3 Pillars
Engineered to Your Exact Specifications
We handle challenging projects that commodity suppliers can't.
Engineered to Your Exact Specifications
Custom Magnetic Solutions
From radial multipole rings to precision-toleranced assemblies. We handle challenging projects that commodity suppliers can't.
- Radial multipole & custom magnetization
- Tight tolerances: ±0.02mm
- Custom coatings: NiCuNi, Epoxy, Zinc
- FEM simulation & prototyping
Rotors, Stators, Couplings
Motor Magnets & Assemblies
High-performance permanent magnet assemblies for electric motors. Pre-glued, balanced, and ready for integration.
- Rotors: Arc segments, ring magnets
- Stators: Bonded & sintered options
- Pre-balanced & encased assemblies
- N35-N52, high-temp grades available
NdFeB, Ferrite, SmCo
Standard Magnet Materials
Quality sintered magnets in all grades. Available as stock shapes or precision-machined to your drawings.
- Neodymium: N35 to N52 grades
- Ferrite: Y25 to Y40 grades
- SmCo: High-temp applications
- Blocks, discs, arcs, rings, custom
How We Ensure Your Project's Success
Why Mainrich?
We solve the problems stopping projects right now — export controls, uncertain lead-times, and quality gaps.
Crisis-Ready Export Clearance
Eliminate export control fears. When you request a quote, we instantly start the export clearance process after a small fee confirmation. This ensures your magnets are ready to ship when you need them.
→ Fewer holds, fewer re-quotes, fewer surprises
Rapid Prototyping
We quote in 24h and deliver custom samples in under a week. Validate grade, coating, and geometry before committing to hard tooling.
→ Fast iteration, de-risked production
Custom-First Factory Production
Move straight into bulk manufacturing. Vertically integrated production means ISO9001 QA, custom grade/coating/magnetization specs, tight tolerances, and no distributor markups.
→ Built to spec, not off-the-shelf
Got an issue with your current supplier?
Talk to UsCase Studies
Success Stories
010 Days
Shipping Delay
European Automotive OEM
Zero Surprise Delays — Export Compliance
MOFCOM takes ~45 working days. We start filing on Day 1, so the license is ready when your magnets are
“Our previous supplier finished production then told us to wait 45 days. With Mainrich, we didn't even have to think about it.”
— Procurement Director, German Tier-1 Supplier
022 Years
Of Persistence
Johnson Electric
2 Years to Win Johnson Electric
Our CEO spent two years re-qualifying factories, renegotiating specs, and proving reliability — until one of the world's largest automotive motor manufacturers said yes
“They didn't offer anything we couldn't find elsewhere. What they did was refuse to give up — every time we raised the bar, they found a way to clear it.”
— Procurement, Johnson Electric
03DDP
Door-to-Door
ONAMAG AG · Switzerland
One Supplier, Zero Headaches
Plastoferrite advice, lower unit costs on single-use items, custom packaging, and door-to-door shipping to Switzerland
“We used to relay every question through a trading rep and wait days for answers. Now we talk directly to the people making our magnets — and changes happen in weeks, not months.”
— ONAMAG AG, Baar, Switzerland
045–10%
Cost Reduction
Motor OEM · Lawn Mower Applications
Heavy Rare Earth Cut from 3% to Under 0.6%
2 years of R&D on grain boundary diffusion to slash rare earth cost — unit price down 5–10%, powering 3M+ lawn mower motors in 2021
“Mainrich spent two years developing a diffusion process that gave us the same H-grade specs at 10% less cost — and with 80% less rare earth dependency.”
— Motor Division Engineer, Lawn Mower OEM
Case Studies
Success
Stories
0 Days
Shipping Delay
European Automotive OEM
Zero Surprise Delays — Export Compliance
MOFCOM takes ~45 working days. We start filing on Day 1, so the license is ready when your magnets are
“Our previous supplier finished production then told us to wait 45 days. With Mainrich, we didn't even have to think about it.”
— Procurement Director, German Tier-1 Supplier
2 Years
Of Persistence
Johnson Electric
2 Years to Win Johnson Electric
Our CEO spent two years re-qualifying factories, renegotiating specs, and proving reliability — until one of the world's largest automotive motor manufacturers said yes
“They didn't offer anything we couldn't find elsewhere. What they did was refuse to give up — every time we raised the bar, they found a way to clear it.”
— Procurement, Johnson Electric
DDP
Door-to-Door
ONAMAG AG · Switzerland
One Supplier, Zero Headaches
Plastoferrite advice, lower unit costs on single-use items, custom packaging, and door-to-door shipping to Switzerland
“We used to relay every question through a trading rep and wait days for answers. Now we talk directly to the people making our magnets — and changes happen in weeks, not months.”
— ONAMAG AG, Baar, Switzerland
5–10%
Cost Reduction
Motor OEM · Lawn Mower Applications
Heavy Rare Earth Cut from 3% to Under 0.6%
2 years of R&D on grain boundary diffusion to slash rare earth cost — unit price down 5–10%, powering 3M+ lawn mower motors in 2021
“Mainrich spent two years developing a diffusion process that gave us the same H-grade specs at 10% less cost — and with 80% less rare earth dependency.”
— Motor Division Engineer, Lawn Mower OEM
Start your
Success Story
Quality You Can Trust
Industry-Leading Certifications
Our facilities maintain the highest quality standards, certified by internationally recognized bodies.
Let's Work Together
Start Your Project Today
Schedule a consultation call or submit a request for quote. We respond within 24 hours.
Request a Quote
Schedule a Call
Book a 30-Minute Consultation
Discuss your project requirements directly with our engineering team. We'll review your specifications and provide tailored recommendations.
- Free consultation
- Technical feasibility review
- Preliminary quote discussion
Available Mon-Fri, 9AM-6PM GMT / HKT