SH / UH
EH / AH
EH / AH
Built for the heat.
High-coercivity grades for demanding traction systems and sustained high-load operation.
Target operating temperatureUp to 220°C
+ Advanced materials. Magnetic technologies.
Engineering
the force
within.
NdFeB permanent magnets.
Precision sintered magnets in custom shapes. For electric mobility, robotics, drones, aerospace and defence.
MAGNETIC DESIGN STUDIOASTROMANTLE / 01
The force behind motion.
Traction motor · curved rotor segments
Preparing your 3D assembly
NdFeBARC SEGMENTS
N S
Drag to orbit · Arrow keys to rotate
Motion · playing
180°C reference
Distance to typical family reference · not a safety margin or retained-strength measurement
Colour shows heat exposure, not measured strength. A higher-coercivity family can expand the design envelope; the complete magnetic circuit still needs qualification.
About temperature references
Typical family maximum-use references, not Astromantle guarantees. Actual limits depend on grade, geometry, opposing field, duty cycle and cooling. Magnetic strength changes even below these references; irreversible loss can occur well before melting. A higher grade number does not automatically mean better heat resistance.
Curved NdFeB segments follow the rotor’s circumference. Alternating poles create its permanent magnetic field.
What to specify for this application
Torque density · thermal duty · rotor fit
Discuss hot-state magnetic targets, coating and dimensional inspection.
Illustrative motor architecture and field paths. Not a product specification or magnetic simulation.
Building India’s next generation of high-performance rare earth permanent magnets.
Discover AstromantleELECTRIC MOBILITY+ROBOTICS & AUTOMATION+AEROSPACE+ADVANCED INDUSTRY
01 / OUR PURPOSE
Invisible force.
Visible impact.
The technologies moving our world forward depend on what’s at their core.
Astromantle Pvt Ltd — Advanced Materials & Magnetic Technologies — is developing that core. Based in Tamil Nadu, India, we are building a specialized facility for high-grade sintered neodymium-iron-boron (NdFeB) rare earth magnets using our proprietary technology.
From custom alloy development to precisely machined magnet shapes, our ambition is complete in-house manufacturing — strengthening India’s critical mineral supply chain and enabling a more self-reliant future.
Discover our approach02 / MAGNETIC MATERIALS
Small in scale.
Powerful by nature.
High-performance sintered NdFeB magnets,
developed around your application.
Our target product portfolio.
50M
52M / 54M
52M / 54M
More force. Less footprint.
High-energy grades for compact motors, robotic joints and weight-critical motion systems.
Target maximum energy product54 MGOe
Your design.
Our precision.
Our precision.
Shaped to your system.
Custom arcs, rings, blocks and skewed segments, with coatings selected for your environment.
Target machining tolerance±0.02 mm
Development targets, subject to grade, geometry, operating conditions and application qualification. Final specifications are agreed with each customer.
FORM FOLLOWS FUNCTION
A precise fit for your next idea.
From familiar forms to application-specific profiles. Explore a concept or brief our engineers.
01 / NdFeB
Arc segments
For rotary magnetic circuits
02 / NdFeBPrecision rings
For compact rotor assemblies
03 / NdFeBFlat blocks
For linear motion systems
04 / NdFeBSkewed segments
For precision servo drives
05 / DESIGN ENQUIRYCubes
Compact magnetic circuits · research fixtures
Discuss this geometry 06 / DESIGN ENQUIRYDiscs & cylinders
Compact actuators · sensing assemblies
Discuss this geometry 07 / DESIGN ENQUIRYSector segments
Axial-flux motor concepts · compact drives
Discuss this geometry 08 / DESIGN ENQUIRYStepped profiles
Space-constrained assemblies · precision fit
Discuss this geometryIllustrative design possibilities, not an off-the-shelf catalogue. New profiles require manufacturability review. Grade, dimensions, magnetization, coating and final specifications are agreed for each application.
YOUR DRAWING. OUR ENGINEERING CONVERSATION.
Beyond standard shapes.
Curved, tapered, chamfered or a profile unique to your assembly. Tell us what needs to fit — we’ll review the geometry, material and manufacturing route with you.
03 / THE SCIENCE WITHIN
Precision.
At every boundary.
Our planned manufacturing approach combines metallurgical control with Grain Boundary Diffusion (GBD) — concentrating heavy rare earths where they contribute most to coercivity.
The goal: high-temperature performance with more efficient use of dysprosium and terbium.
10 TPA
Planned initial capacity
Purpose-built for specialized production
From alloy to powder
Vacuum melting, strip casting and controlled jet milling establish the foundation for consistent magnetic performance.
Align. Sinter. Refine.
Magnetic field alignment, vacuum sintering and grain boundary diffusion develop the material’s magnetic and thermal properties.
Precision in every dimension
Wire EDM, diamond slicing and grinding shape each magnet to the exact requirements of your design.
Protect and verify
Application-specific coatings, dimensional inspection and magnetic characterization support repeatable quality.
04 / ENGINEERED FOR YOUR WORLD
The core of
what comes next.
Partnering with the engineers
turning ambitious designs
into the next generation of motion.
01Electric mobility
From passenger EVs to commercial vehicles and micro-mobility: custom magnets developed for high torque, thermal resilience and efficient power delivery.
TARGET GRADES42UH · 45UH · 48SH · 38EH · 40EH
02Robotics & automation
Compact, high-energy magnets for frameless robot joints, precision servo drives and linear motion systems where mass, torque ripple and response matter.
TARGET GRADES48SH · 50M · 52M · 54M
03Aerospace & advanced mobility
Weight-conscious custom arc geometries for electric aircraft and UAV propulsion, developed around demanding power-to-weight requirements.
TARGET GRADES52SH · 50UH
04Heavy industry & infrastructure
Robust magnet solutions for rail traction, heavy equipment, process pumps and high-speed compressors, with protection matched to harsh operating environments.
TARGET GRADES45UH · 48UH · 40UH · 42UH · 38EH
BUILT HERE. THINKING BEYOND.
A stronger magnetic core.
A more self-reliant India.
We’re building domestic capability in critical magnetic materials — connecting material science, precision manufacturing and the ambition to power tomorrow.
05 / LET’S BUILD WHAT’S NEXT
FROM CONCEPT TO COMPONENT
Give your design
its magnetic core.
Bring us the geometry, thermal environment and production need. Start a conversation about a magnet developed around your system.
- Define the fit. Drawing, dimensions and critical tolerances.
- Match the material. Temperature, magnetic circuit and coating.
- Agree the evidence. Sample evaluation, inspection and qualification needs.
Have a design, a challenge, or a new application?
Start a conversation with our engineering team.