Rated to 150°C (302°F), High Coercivity Neodymium Magnets
We offer Custom SH (Super High) Series Neodymium Magnets.
They can reliably work at temperatures up to 150°C.
Standard magnets (N-Grade) lose strength at 80°C.
Our SH-Grade comes with added Dysprosium to resist heat and demagnetization.
This makes it the industry standard choice for applications where heat generation is unavoidable.
For example, brushless DC (BLDC) Motors, industrial generators, and automotive motors.
Why SH Grade Neodymium?
If you are building a motor or a high-stress mechanical device, SH is often the safest choice.
1. The 150°C Safety Margin:
Many industrial motors are rated for “Class F” insulation (155°C).
The Risk:
Using an H-Grade (120°C) magnet in these motors is risky.
If the motor runs hot, the magnet will permanently lose power (demagnetize).
The Solution:
SH magnets match the thermal limit of most industrial motors.
They provide a critical safety buffer to ensure your motor keeps running efficiently even under heavy load.
2. Resistance to “Repelling” Forces:
The Science:
Heat isn’t the only enemy.
When a motor spins, coils create magnetic fields that try to push back against the magnet.
The Benefit:
SH stands for Super High Coercivity.
This means the magnet is “stubborn.”
It resists being demagnetized by both heat and strong opposing magnetic fields.
Available Grades (SH Series)
We can supply a wide range of magnetic strengths within the SH temperature class:
35SH: The most common grade for general-purpose motors. Good balance of strength and cost.
38SH / 40SH: Higher strength for compact, high-torque applications.
42SH / 45SH: Premium high-power grades for performance racing or aerospace.
48SH: The strongest available SH grade. Used when you need maximum power density.
Manufacturing Options
1. Best Coatings for Motors:
Phosphating (Passivation):
This is a gray chemical coating.
It is very thin and holds glue better than nickel.
Highly recommended if you are gluing magnets onto a steel rotor.
Nickel (Ni-Cu-Ni):
The standard shiny silver finish.
Good for general corrosion resistance.
Epoxy:
Recommended if the magnet is exposed to outdoor moisture or salt.
2. Custom Shapes:
We cut SH material to your exact design:
Arc / Segment Magnets: Curved tiles for electric motor rotors.
Bread Loaf: Rectangular with a rounded top (reduces motor cogging).
Blocks & Discs: Standard shapes for magnetic couplings and sensors.
Ideal Applications
Electric Motors: BLDC motors, Servo motors, and Stepper motors.
Wind Turbines: Generators requiring long-term stability.
Automotive: Power steering motors and pump actuators.
Magnetic Couplings: transferring torque through a barrier without contact.
Ordering Guide
To get a quick quote, please provide:
1). Dimensions: Length x Width x Thickness (or a drawing for Arc segments).
2). Grade: e.g., “35SH” or “42SH”.
3). Coating: “Will you be gluing this magnet?” (If yes, we suggest Phosphating or Zinc).
4). Magnetization Direction:
– Through Thickness (Standard).
– Diametric (For some sensor/motor designs).
